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3Com 3CRWEASYA73 Owner's Manual

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1. To enter Interface mode you must enter the interface ethernet or interface wireless a or interface wireless g command while in Global Configuration mode The system prompt will change to Outdoor 11a Building to Building if ethernet or Outdoor 11a Building to Building if wireless indicating that you have access privileges to the associated commands You can use the end command to return to the Exec mode Outdoor lla Building to Building config interface ethernet Outdoor lla Building to Building if ethernet Command Line Processing Commands are not case sensitive You can abbreviate commands and parameters as long as they contain enough letters to differentiate them from any other currently available commands or parameters You can use the Tab key to complete partial commands or enter a partial command followed by the character to display a list of possible matches You can also use the following editing keystrokes for command line processing 6 6 Using the Command Line Interface Table 8 Keystroke Commands Keystroke Function Ctrl A Shifts cursor to start of command line Ctrl B Shifts cursor to the left one character Ctrl C Terminates a task and displays the command prompt Ctrl E Shifts cursor to end of command line Ctrl F Shifts cursor to the right one character Ctrl K Deletes from cursor to the end of the command line Ctrl L Repeats current command line on a new li
2. Authentication WPA Encryption Enable WPA Configuration Supported Cipher Suite WEP 802 1x Required Set 802 1x key refresh and re authentication rates Enter 1 to 4 WEP keys Select a WEP transmit key Authentication WPA Encryption Enable WPA Configuration Supported Cipher Suite WEP 802 1x Supported Set 802 1x key refresh and re authentication rates Authentication WPA2 Encryption Enable WPA Configuration Required Cipher Suite AES CCMP 802 1x Required Set 802 1x key refresh and re authentication rates Authentication WPA2 PSK Encryption Enable WPA Configuration Required Cipher Suite AES CCMP 802 1x Disable WPA Pre shared Key Type Hexadecimal or Alphanumeric Enter a WPA Pre shared key 5 52 Local RADIUS or Disabled Local only Local only Local RADIUS or Disabled Local or Disabled Local or Disabled Local or Disabled Local or Disabled Yes No Yes Yes Yes Yes No Security Client Security Configuration Summary MAC RADIUS Combination Authentication Server 802 1x WPA WPA2 Authentication WPA WPA2 mixed Local or Disabled Yes Mixed Mode Encryption Enable WPA Configuration Required Cipher Suite TKIP 802 1x Required Set 802 1x key refresh and re authentication rates WPA WPA2 Mixed Authentication WPA WPA2 PSK mixed Local or Disabled No Mode Pre Shared Key Encryption Enable WPA Configuration Required Cipher Suite TKIP
3. Enmbie O Disable 80 Enable O Disable 443 CHAPTER 5 SYSTEM CONFIGURATION DHCP Client Enable Select this option to obtain the IP settings for the access point from a DHCP Dynamic Host Configuration Protocol server The IP address subnet mask default gateway and Domain Name Server DNS address are dynamically assigned to the access point by the network DHCP server Default Enabled DHCP Client Disable Select this option to manually configure a static address for the access point IP Address The IP address of the access point Valid IP addresses consist of four decimal numbers O to 255 separated by periods Subnet Mask The mask that identifies the host address bits used for routing to specific subnets Default Gateway The default gateway is the IP address of the router for the access point which is used if the requested destination address is not on the local subnet If you have management stations DNS RADIUS or other network servers located on another subnet type the IP address of the default gateway router in the text field provided Otherwise leave the address as all zeros 0 0 0 0 Primary and Secondary DNS Address The IP address of Domain Name Servers on the network A DNS maps numerical IP addresses to domain names and can be used to identify network hosts by familiar names instead of the IP addresses If you have one or more DNS servers located on the local network type the IP addresses
4. e The access point uses Outdoor 11a Building to Building OL Extensible Authentication Protocol Over LANs packets to pass dynamic unicast session and broadcast keys to wireless clients The 802 1x broadcast key refresh rate command specifies the interval after which the broadcast keys are changed The 802 1x session key refresh rate command specifies the interval after which unicast session keys are changed e Dynamic broadcast key rotation allows the access point to generate a random group key and periodically update all key management capable wireless clients Using the Command Line Interface Example Outdoor 1la Building to Building config 802 1X broadcast key refresh rate 5 Outdoor lla Building to Building config 802 1x session key refresh rate This command sets the interval at which unicast session keys are refreshed for associated stations using dynamic keying Syntax 802 1x session key refresh rate lt rate gt rate The interval at which the access point refreshes a session key Range O 1440 minutes Default Setting O Disabled Command Mode Global Configuration Command Usage Session keys are unique to each client and are used to authenticate a client connection and correlate traffic passing between a specific client and the access point Example Outdoor lla Building to Building config 802 1x session key refresh rate 5 Outdoor lla Building to Building config 802 1x session timeout This c
5. 802 1x Disable WPA Pre shared Key Type Hexadecimal or Alphanumeric Enter a WPA Pre shared key a The configuration summary does not include the set up for MAC authentication see page 5 10 or RADIUS server see page 5 8 b The configuration of RADIUS MAC authentication together with 802 1x WPA or WPA Pre shared Key is not supported c RADIUS server required only when RADIUS MAC authentication is configured NOTE If you choose to configure RADIUS MAC authentication together with 802 1X the RADIUS MAC address authentication occurs prior to 802 1X authentication Only when RADIUS MAC authentication succeeds is 802 1X authentication performed When RADIUS MAC authentication fails 802 1X authentication is not performed WIRED EQUIVALENT PRIVACY WEP WEP provides a basic level of security preventing unauthorized access to the network and encrypting data transmitted between wireless clients and the access point WEP uses static shared keys fixed length hexadecimal or alphanumeric strings that are manually distributed to all clients that want to use the network WEP is the security protocol initially specified in the IEEE 802 11 standard for wireless communications Unfortunately WEP has been found to be seriously flawed and cannot be recommended for a high level of network security For more robust wireless security the access point provides Wi Fi Protected Access WPA for improved data encryption and user authentication Se
6. Li 8 PIN DIN To RJ 45 CABLE WIRING To construct an extended Ethernet cable to connect from the power injector s RJ 45 Output port to the wireless bridge s 8 pin DIN connector follow the wiring diagram below Use Category 5 or better UTP or STP cable maximum length 100 m 328 ft and be sure to connect all four wire pairs NOTE To construct a reliable Ethernet cable always use the proper tools or ask a professional cable supplier to construct the cable White Orange Stripe Ye Orange N f White Green Stripe 8 Pin DIN 1 1 Female A E 2 Ss RJ 45 White Blue Stripe s 6 6 7 7 a 8 8 U Green P SS White Brown Stripe Ye Brown O s 6 5 8 Pin DIN Female Front View how N B 6 GLOSSARY 10BASE T IEEE 802 3 specification for 10 Mbps Ethernet over two pairs of Category 3 or better UTP cable 100BASE TX IEEE 802 3u specification for 100 Mbps Fast Ethernet over two pairs of Category 5 or better UTP cable Access Point An internetworking device that seamlessly connects wired and wireless networks Access points attached to a wired network support the creation of multiple radio cells that enable roaming throughout a facility Ad Hoc A group of computers connected as an independent wireless network without an access point Advanced Encryption Standard AES An encryption algorithm that implements symmetric k
7. Orange AW p White Green Stripe e End B 1 1 EndA Z2 2 we Blue E a 3 13 SS L 4 4 s5 White Blue Stripe a5 aaa T ee oe Green a6 7 7 5 ET 7 Brown B 3 CROSSOVER WIRING Because the 10 100 Mbps port on the power injector uses an MDI pin configuration you must use crossover cable for network connections to PCs servers or other end nodes that only have MDI ports However if the device to which you are connecting supports automatic MDI MDI X operation you can use either straight through or crossover cable EIA TIA 568B RJ 45 Wiring Standard 10 100BASE TX Crossover Cable White Orange Stripe White Green Stripe EndB Blue White Blue Stripe N Green PE N ONONAUNa ll B 4 8 PIN DIN CONNECTOR PINOUT The Ethernet cable from the power injector connects to an 8 pin DIN connector on the wireless bridge This connector is described in the following figure and table O oOo N 8 amp Pin DIN Ethemet Port Pinout Pin Signal Name 1 Transmit Data plus TD 2 Transmit Data minus TD 3 Receive Data plus RD 4 48 VDC power 5 48 VDC power 6 Receive Data minus RD 7 Return power 8 Return power Note The and signs represent the polarity of the wires that make up each wire pair B 5
8. 0 9 _ e f the file contains an error it cannot be set as the default file 6 61 CHAPTER 6 COMMAND LINE INTERFACE Example Outdoor lla Building to Building bootfile img bin Outdoor lla Building to Building copy This command copies a boot file code image or configuration file between the access point s flash memory and a FTP TFTP server When you save the configuration settings to a file on a FTP TFTP server that file can later be downloaded to the access point to restore system operation The success of the file transfer depends on the accessibility of the FTP TFTP server and the quality of the network connection Syntax copy lt ftp tftp gt file copy config lt ftp tftp gt e ftp Keyword that allows you to copy to from an FTP server e tftp Keyword that allows you to copy to from a TFTP server e file Keyword that allows you to copy to from a flash memory file e config Keyword that allows you to upload the configuration file from flash memory Default Setting None Command Mode Exec Command Usage e The system prompts for data required to complete the copy command e Only a configuration file can be uploaded to an FTP TFTP server but every type of file can be downloaded to the access point e The destination file name should not contain slashes or the leading letter of the file name should not be a period and the maximum length for file names on the FTP TFTP ser
9. An alias for the access point enabling the device to be uniquely identified on the network Default Enterprise Wireless AP Range 1 32 characters 5 4 TCP IP Settings TCP IP SETTINGS Configuring the access point with an IP address expands your ability to manage the access point A number of access point features depend on IP addressing to operate NOTE You can use the web browser interface to access IP addressing only if the access point already has an IP address that is reachable through your network By default the access point will be automatically configured with IP settings from a Dynamic Host Configuration Protocol DHCP server Use 3Com Wireless Infrastructure Device Manager to discover or set the initial IP address of the unit WIDMAN will allow you to launch a web browser on the Access Point s web management interface by selecting the Access Point and the configure button NOTE If there is no DHCP server on your network or DHCP fails the access point will automatically start up with a default IP address of 169 254 2 1 Figure 13 TCP IP Settings i Advanced Setup g a d 11bg Access Point eo N i TCP IP Settings DHCP Client Enable The Access Point will obtain the IP Address from the DHCP Server Disable The Access Point will use the following IP setup 19216811 255 255 255 0 192 168 1200 0000 0000 Web Servers e Security 802 11b Interface e Radio Settings Security
10. Outdoor lla Building to Building 6 98 Using the Command Line Interface Outdoor lla Building to Building show bridge link ethernet status Enabled state Forwarding priority 710 path cost ely message age Timer Inactive message age 4346 designated root priority 32768 MAC 00 30 F1 F0 9A 9C designated cost g designated bridge priority 32768 MAC 00 30 F1 F0 9A 9C designated port priority 0 port No 1 forward transitions 1 Outdoor lla Building to Building Spanning Tree Commands The commands described in this section are used to set the MAC address table aging time and spanning tree parameters for both the Ethernet and wireless interfaces Table 23 Bridge Commands Command Function Mode Page bridge stp enable Enables the Spanning Tree feature GC 6 99 bridge stp forwarding delay Configures the spanning tree bridge forward time GC 6 100 bridge stp hello time Configures the spanning tree bridge hello time GC 6 101 bridge stp max age Configures the spanning tree bridge maximum age GC 6 101 bridge stp priority Configures the spanning tree bridge priority GC 6 102 bridge link path cost Configures the spanning tree path cost of a port IC 6 103 bridge link port priority Configures the spanning tree priority of a port IC 6 104 show bridge stp Displays the global spanning tree settings Exec 6 104 show bridge link Displays current bridge settings for specified interfaces Exec 6 97 bridge s
11. Outdoor lla Building to Building reset board Reboot system now lt y n gt y CHAPTER 6 COMMAND LINE INTERFACE show history This command shows the contents of the command history buffer Default Setting None Command Mode Exec Command Usage e The history buffer size is fixed at 10 commands e Use the up or down arrow keys to scroll through the commands in the history buffer Example In this example the show history command lists the contents of the command history buffer Outdoor lla Building to Building show history config exit show history Outdoor lla Building to Building show line This command displays the console port s configuration settings Command Mode Exec Example The console port settings are fixed at the values shown below Outdoor lla Building to Building show line Console Line Information databits Erg parity none speed 9600 stop bits 1 Outdoor lla Building to Building Using the Command Line Interface System Management Commands These commands are used to configure the user name password system logs browser management options clock settings and a variety of other system information Table 11 System Management Commands Command Function Mode Page Country Setting country Sets the access point country code Exec 6 13 Device Designation prompt Customizes the command line prompt GC 6 15 system name Specifies the host name for the access point GC 6 16 snmp se
12. e value The key string For 64 bit keys use 5 alphanumeric characters or 10 hexadecimal digits For 128 bit keys use 13 alohanumeric characters or 26 hexadecimal digits For 152 bit keys use 16 alohanumeric characters or 32 hexadecimal digits Default Setting None Command Mode Interface Configuration Wireless Command Usage e To enable Wired Equivalent Privacy WEP use the auth shared key command to select the shared key authentication type use the key command to configure at least one key and use the transmit key command to assign a key to one of the VAP interfaces e If WEP option is enabled all wireless clients must be configured with the same shared keys to communicate with the access point e The encryption index length and type configured in the access point must match those configured in the clients 6 143 CHAPTER 6 COMMAND LINE INTERFACE Example Outdoor lla Building to Building if wireless g key 1 64 hex 1234512345 Outdoor lla Building to Building if wireless g key 2 128 ascii asdeipadjsipd Outdoor lla Building to Building if wireless g key 3 64 hex 12345123451234512345123456 Outdoor lla Building to Building if wireless g Related Commands key 6 143 encryption 6 142 transmit key 6 144 transmit key This command sets the index of the key to be used for encrypting data frames for broadcast or multicast traffic transmitted from the VAP to wireless clients Syntax transmit
13. export or import to another country Contents Introduction Product Features 1 1 Radio Characteristics 1 2 APPROVED CHANNELS 1 2 Package Checklist 1 3 Hardware Description 1 4 Integrated High Gain Antenna 1 4 External Antenna Options 1 4 Ethernet Port 1 5 Power Injector Module 1 5 Grounding Point 1 6 Water Tight Test Point 1 6 Wall and Pole Mounting Bracket Kit 1 7 System Configuration 1 7 Operating Modes 1 7 Point to Point Configuration 1 8 Point to Multipoint Configuration 1 8 Bridge Link Planning Data Rates 2 2 Radio Path Planning 2 3 Antenna Height 2 4 Antenna Position and Orientation 2 6 Radio Interference 2 7 Weather Conditions 2 7 Ethernet Cabling 2 8 Grounding 2 8 Hardware Installation Testing Basic Link Operation 3 2 Mount the Unit 3 2 iii Using the Pole Mounting Bracket 3 2 Using the Wall Mounting Bracket 3 4 Connect External Antennas 3 6 Connect Cables to the Unit 3 7 Connect the Power Injector 3 7 Check the LED Indicators 3 9 Align Antennas 3 10 Initial Configuration Networks with a DHCP Server 4 1 Networks without a DHCP Server 4 1 Using the 3Com Installation CD 4 2 Launch the 3COM Wireless Infrastructure Device Manager Widman utility 4 2 Launching the 3com Wireless Interface Device Manager 4 2 First Time Only 4 4 Using the Setup Wizard 4 4 System Configuration Advanced Setup 5 2 System Identification 5 4 TCP IP Settings 5 5 RADIUS 5 8 Authentication 5 10 Filter Control 5 15
14. it does not affect communications between wireless clients and the wired network Example Outdoor lla Building to Building config filter local bridge Outdoor lla Building to Building config 6 84 Using the Command Line Interface filter ap manage This command prevents wireless clients from accessing the management interface on the access point Use the no form to disable this filtering Syntax no filter ap manage Default Enabled Command Mode Global Configuration Example Outdoor lla Building to Building config filter AP manage Outdoor lla Building to Building config filter uplink enable This command enables filtering of MAC addresses from the Ethernet port Syntax no filter uplink enable Default Disabled Command Mode Global Configuration Example Outdoor lla Building to Building config filter uplink enable Outdoor lla Building to Building config filter uplink This command adds or deletes MAC addresses from the uplink filtering table Syntax filter uplink lt add delete gt MAC address MAC address Specifies a MAC address in the form xx Xx XX XX XX XX A maximum of eight addresses can be added to the filtering table CHAPTER 6 COMMAND LINE INTERFACE Default Disabled Command Mode Global Configuration Example Outdoor lla Building to Building config filter uplink add 00 12 34 56 78 9a Outdoor lla Building to Building config filter ethernet type enable This command
15. network reset Restarts the system Exec 6 11 show history Shows the command history buffer Exec 6 12 show line Shows the configuration settings for the console port Exec 6 12 configure This command activates Global Configuration mode You must enter this mode to modify most of the settings on the access point You must also enter Global Configuration mode prior to enabling the context modes for Interface Configuration See Using the Command Line Interface on page 1 6 8 Using the Command Line Interface Default Setting None Command Mode Exec Example Outdoor lla Building to Building configure Outdoor lla Building to Building config Related Commands end 6 9 end This command returns to the previous configuration mode Default Setting None Command Mode Global Configuration Interface Configuration Example This example shows how to return to the Configuration mode from the Interface Configuration mode Outdoor lla Building to Building if ethernet end Outdoor lla Building to Building config 6 9 CHAPTER 6 COMMAND LINE INTERFACE Ae command returns to the Exec mode or exits the configuration program Default Setting None Command Mode Any Example This example shows how to return to the Exec mode from the Interface Configuration mode and then quit the CLI session Outdoor lla Building to Building if ethernet exit Outdoor lla Building to Building exit CLI session with the Access Point
16. set the authentication type to shared key and define at least one static WEP key with the key command Encryption is automatically enabled by the command To use WEP encryption only no authentication set the authentication type to open system Then enable WEP with the encryption command and define at least one static WEP key with the key command When any WPA or WPA2 option is selected clients are authenticated using 802 1X via a RADIUS server Each client must be WPA enabled or support 802 1X client software The 802 1X settings see 802 1X Authentication on page 71 and RADIUS server details see RADIUS Client on page 65 must be configured on the access point A RADIUS server must also be configured and be available in the wired network If a WPA WPA2 mode that operates over 802 1X is selected WPA WPA2 WPA WPA2 mixed or WPA WPA2 PSK mixed the 802 1X settings see 802 1X Authentication on page 71 and RADIUS server details see RADIUS Client on page 65 must be configured Be sure you have also configured a RADIUS server on the network before enabling authentication Also note that each client has to be WPA enabled or support 802 1X client software A RADIUS server must also be configured and be available in the wired network If a WPA WPA2 Pre shared Key mode is selected WPA PSK WPA2 PSK or WPA WPA2 PSK mixed the key must first be generated and distributed to all wireless clients before they ca
17. 0 9 Firmware Upgrade Remote Downloads an operation code image file from a specified remote FTP or TFP server After filling in the following fields click Start Upgrade to proceed a New firmware file Specifies the name of the code file on the server The new firmware file name should not contain slashes or the leading letter of the file name should not be a period and the maximum length for file names on the FTP TFTP server is 255 characters or 32 characters for files on the access point Valid characters A Z a z 0 9 _ a P Address IP address or host name of FTP or TFTP server a Username The user ID used for login on an FTP server a Password The password used for login on an FTP server Configuration File Backup Restore Uploads the current access point configuration file to a specified remote TFTP server A configuration file can also be downloaded to the access point to restore a specific configuration a Config file Specifies the name of the configuration file which must always be syscfg A path on the server can be specified using in the name providing the path already exists for example myfolder syscfg Other than to indicate a path the file name must not contain any slashes or the leading letter cannot be a period and the maximum length for file names on the TFTP server is 255 characters Valid characters A Z a z 0 9 _ a P
18. 1la Building to Building if wireless g Related Commands encryption 6 142 key 6 143 encryption This command enables data encryption for wireless communications Use the no form to disable data encryption Syntax no encryption Default Setting disabled Command Mode Interface Configuration Wireless VAP Command Usage e Wired Equivalent Privacy WEP is implemented in this device to prevent unauthorized access to your wireless network For more secure data transmissions enable encryption with this command and set at least one Static WEP key with the key command e The WEP settings must be the same on each client in your wireless network e Note that WEP protects data transmitted between wireless nodes but does not protect any transmissions over your wired network or over the Internet e You must enable data encryption in order to enable all types of encryption WEP TKIP and AES CCMP in the access point 6 142 Using the Command Line Interface Example Outdoor lla Building to Building if wireless g VAP 0 encryption Outdoor 1la Building to Building if wireless g Related Commands key 6 143 key This command sets the keys used for WEP encryption Use the no form to delete a configured key Syntax key lt index gt lt size gt lt type gt lt value gt no key index e index Key index Range 1 4 size Key size Options 64 128 or 152 bits e type Input format Options ASCII HEX
19. 1x authentication and session based keys Roaming A wireless LAN mobile user moves around an ESS and maintains a continuous connection to the infrastructure network vii RTS Threshold Transmitters contending for the medium may not be aware of each other they are hidden nodes The RTS CTS mechanism can solve this problem If the packet size is smaller than the preset RTS Threshold size the RTS CTS mechanism will not be enabled VAP Virtual Access Point An access point radio capable of operating as four separate access points VLAN Virtual Local Area Network A LAN consisting of groups of hosts that are on physically different segments but that communicate as though they were on the same segment WEP Wired Equivalent Privacy is based on the use of security keys and the popular RC4 encryption algorithm Wireless devices without a valid WEP key will be excluded from network traffic WDS Wireless Distribution System WPA Wi Fi Protected Access viii 1 INTRODUCTION The 3Com Outdoor 11a Building to Building Bridge and 11bg Access Point system provides point to point or point to multipoint bridge links between remote Ethernet LANs and wireless access point services for clients in the local LAN area It includes an integrated high gain antenna for the 802 11a radio and can operate as a Slave or Master bridge in point to multipoint configurations or provide a high speed point to point wireless l
20. 21 Filtering Commands Command Function Mode Page filter local bridge Disables communication between wireless clients GC 6 83 filter ap manage Prevents wireless clients from accessing the GC 6 85 management interface filter uplink enable Ethernet port MAC address filtering GC 6 85 filter uplink Adds or deletes a MAC address from the filtering table GC 6 85 filter ethernet type enable Checks the Ethernet type for all incoming and outgoing GC 6 86 Ethernet packets against the protocol filtering table filter ethernet type Sets a filter for a specific Ethernet type GC 6 87 protocol show filters Shows the filter configuration Exec 6 87 filter local bridge This command disables communication between wireless clients Use the no form to disable this filtering Syntax filter local bridge lt all VAP intra VAP gt no filter local bridge all VAP When enabled clients cannot establish wireless communications with any other client either those associated to the same VAP interface or any other VAP interface intra VAP When enabled clients associated with a specific VAP interface cannot establish wireless communications with each other Clients can communicate with clients associated to other VAP interfaces 6 83 CHAPTER 6 COMMAND LINE INTERFACE Default Disabled Command Mode Global Configuration Command Usage This command can disable wireless to wireless communications between clients via the access point However
21. Address IP address or host name of the TFTP server CHAPTER 5 SYSTEM CONFIGURATION Restore Factory Settings Click the Restore button in the user interface to reset the configuration settings for the access point to the factory defaults and reboot the system Note that all user configured information will be lost You will have to re enter the default user name admin to re gain management access to this device Reboot Access Point Click the Reset button in the user interface to reboot the system NOTE If you have upgraded system software then you must reboot the access i point to implement the new operation code New software that is incompatible with the current configuration automatically restores the access point to default values when first activated after a reboot WDS AND SPANNING TREE SETTINGS Each access point radio interface can be configured to operate in a bridge or repeater mode which allows it to forward traffic directly to other access point units To set up bridge links between access point units you must configure the wireless Distribution System WDS forwarding table by specifying the wireless MAC address of all units to which you want to forward traffic Up to six WDS bridge or repeater links can be specified for each unit in the wireless bridge network The Spanning Tree Protocol STP can be used to detect and disable network loops and to provide backup links between bridges This allows a wireless b
22. Command Line Interface Syntax snmp server filter lt fi ter id gt lt include exclude gt lt subtree gt mask mask no snmp server filter lt fi ter id gt subtree e filter id A user defined name that identifies an SNMP v3 notification filter Maximum length 32 characters e include Defines a filter type that includes objects in the MIB subtree e exclude Defines a filter type that excludes objects in the MIB subtree e subtree The part of the MIB subtree that is to be filtered e mask An optional hexadecimal value bit mask to define objects in the MIB subtree Default Setting None Command Mode Global Configuration Command Usage e The access point allows up to 10 notification filters to be created Each filter can be defined by up to 20 MIB subtree ID entries e Use the command more than once with the same filter ID to build a filter that includes or excludes multiple MIB objects Note that the filter entries are applied in the sequence that they are defined e The MIB subtree must be defined in the form 1 3 6 1 and always start witha e The mask is a hexadecimal value with each bit masking the corresponding ID in the MIB subtree A 1 in the mask indicates an exact match and a 0 indicates a wild card For example a mask value of OxFFBF provides a bit mask 1111 1111 1011 1111 If applied to the subtree 1 3 6 1 2 1 2 2 1 1 23 the zero corresponds to the 10th subtree ID W
23. MAC address authentication Syntax mac authentication server local remote e local Authenticate the MAC address of wireless clients with the local authentication database during 802 11 association e remote Authenticate the MAC address of wireless clients with the RADIUS server during 802 1X authentication CHAPTER 6 COMMAND LINE INTERFACE Default Disabled Command Mode Global Configuration Example Outdoor lla Building to Building config mac authentication server remote Outdoor lla Building to Building config Related Commands address filter entry 6 79 radius server address 6 66 802 1x supplicant user 6 76 mac authentication session timeout This command sets the interval at which associated clients will be re authenticated with the RADIUS server authentication database Use the no form to disable reauthentication Syntax mac authentication session timeout lt minutes gt minutes Re authentication interval Range 0 1440 Default O disabled Command Mode Global Configuration Example Outdoor lla Building to Building config mac authentication session timeout 1 Outdoor lla Building to Building config Filtering Commands The commands described in this section are used to filter communications between wireless clients control access to the management interface from wireless clients and filter traffic using specific Ethernet protocol types Using the Command Line Interface Table
24. Mode Global Configuration Command Usage This command sets the local time zone relative to the Coordinated Universal Time UTC formerly Greenwich Mean Time or GMT based on the earth s prime meridian zero degrees longitude To display a time corresponding to your local time you must indicate the number of hours and minutes your time zone is east before or west after of UTC Example Outdoor lla Building to Building config sntp server timezone 8 Outdoor lla Building to Building config show sntp This command displays the current time and configuration settings for the SNTP client Command Mode Exec Example Outdoor lla Building to Building show sntp SNTP Information Service State SNTP server 1 IP SNTP server 2 IP Current Time Time Zone Daylight Saving Enabled 137 92 140 80 192 43 244 18 08 04 Jun 20th 2003 8 TAIPEI BEIJING Enabled from Jun 1st to Sep 1st Outdoor lla Building to Building 6 41 CHAPTER 6 COMMAND LINE INTERFACE DHCP Relay Commands Dynamic Host Configuration Protocol DHCP can dynamically allocate an IP address and other configuration information to network clients that broadcast a request To receive the broadcast request the DHCP server would normally have to be on the same subnet as the client However when the access point s DHCP relay agent is enabled received client requests can be forwarded directly by the access point to a known DHCP serv
25. OPERATING MODES The 3Com Outdoor 11a Building to Building Bridge and 11bg Access Point system provides access point or bridging services through either the 5 GHz or 2 4 GHz radio interfaces The unit supports both point to point and point to multipoint bridge modes Wireless bridge units can be used as regular 802 11a b g access points connected to a local wired LAN providing connectivity and roaming services for wireless clients in an outdoor area Units can also be used purely as bridges connecting remote LANs Alternatively you can employ both access point and bridging functions together offering a flexible and convenient wireless solution for many applications The wireless bridge modes connect two or more wired networks for example networks in different buildings with no wired connections You will need a 3Com Outdoor 11a Building to Building Bridge and 11bg Access Point unit on both sides of the connection The wireless bridge can connect up to six remote networks When using bridge mode on a radio band only wireless bridge units can associate to each other Wireless clients can only associate with the unit using a radio band set to access point mode POINT TO POINT CONFIGURATION Two bridges can form a wireless point to point link using their 5 GHz 802 11a integrated antennas A point to point configuration can provide a limited data rate 6 Mbps link over a long range up to 15 4 km or a high data rate 108 Mbps over a s
26. RSSI Type Privacy RSN 00 04 e2 2a 37 23 WLAN1AP 11 2462 MHz 17 ESS 0 0 00 04 e2 2a 37 3d ANY 7 2442 MHz 42 ESS 0 0 00 04 e2 2a 37 49 WLAN1AP 9 2452 MHz 42 ESS 0 0 00 90 d1 08 9d a7 WLAN1AP 1 2412 MHz 12 ESS 0 0 00 30 f1 fb 31 f4 WLAN 6 2437 MHz 16 ESS 0 0 Outdoor lla Building to Building Wireless Security Commands The commands described in this section configure parameters for wireless security on the 802 11a and 802 119 interfaces Table 27 Wireless Security Commands Command Function Mode Page auth Defines the 802 11 authentication type allowed by IC W VAP 6 143 the access point encryption Defines whether or not WEP encryption is used to IC W VAP 6 142 provide privacy for wireless communications key Sets the keys used for WEP encryption IC W 6 143 transmit key Sets the index of the key to be used for encrypting IC W VAP 6 144 data frames sent between the access point and wireless clients cipher suite Selects an encryption method for the global key used IC W VAP 6 145 for multicast and broadcast traffic mic_mode Specifies how to calculate the Message Integrity IC W 6 146 Check MIC Wpa pre shared key Defines a WPA preshared key value IC W VAP 6 147 6 139 CHAPTER 6 COMMAND LINE INTERFACE Command Function Mode Page pmksa lifetime Sets the lifetime PMK security associations IC W VAP 6 148 pre authentication Enables WPA2 pre authentication for fast roaming IC W VAP 6 149 auth This command configures auth
27. Use Category 5e or better UTP cable for 10 100BASE TX connections NOTE The RJ 45 port on the power injector is an MDI port If connecting directly to a computer for testing the link use a crossover cable lt lt AC power Ethernet cable from LAN Switch Input Power LED indicator Ethernet cable to wireless bridge 1 Insert the power cable plug directly into the standard AC receptacle on the power injector 2 Plug the other end of the power cable into a grounded 3 pin socket AC power source NOTE For International use you may need to change the AC line cord You must use a line cord set that has been approved for the receptacle type in your country 3 Check the LED on top of the power injector to be sure that power is being supplied to the wireless bridge through the Ethernet connection 3 8 CHECK THE LED INDICATORS The bridge s 11a and 11b g LEDs operate in two display modes which are configurable through the software The default AP mode indicates data traffic rates The RSSI mode indicates the received signal power and is for use when aligning antennas in a bridge link When the bridge is connected to power the LEDs indicate as follows LED Color Indicates Power Green The bridge is powered up and operating normally wg 9 9 per Power Off The bridge is not receiving power or map 9 aun there is a fault with the power supply Amber The system is under cold reset status Link Gr
28. a Maximum data rate up to 108 Mbps on the 802 11a 5 GHz radio a Outdoor weatherproof design a IEEE 802 11a and 802 11b g compliant a Local network connection via 10 100 Mbps Ethernet port a Powered through its Ethernet cable connection to the power injector module a Brackets for wall or pole mount options a Security through 64 128 152 bit Wired Equivalent Protection WEP or 128 bit Advanced Encryption Standard AES encryption a Scans all available channels and selects the best channel and data rate based on the signal to noise ratio a Manageable through an easy to use web browser interface command line or SNMP network management tools RADIO CHARACTERISTICS The IEEE 802 11a and 802 11g standards use a radio modulation technique known as Orthogonal Frequency Division Multiplexing OFDM and a shared collision domain CSMA CA The 802 11a standard operates in the 5 GHz Unlicensed National Information Infrastructure UNII band and the 802 11g standard in the 2 4 GHz band IEEE 802 11g includes backward compatibility with the IEEE 802 1 1b standard IEEE 802 11b also operates at 2 4 GHz but uses Direct Sequence Spread Spectrum DSSS and Complementary Code Keying CCK modulation technology to achieve a communication rate of up to 11 Mbps The wireless bridge provides a 54 Mbps half duplex connection for each active channel up to 108 Mbps in turbo mode on the 802 1 1a interface APPROVED CHANNELS Use of this product is o
29. a ch EGA certified for use with the access point are listed in the 50 ch 5 250 GHz drop down menu Selecting the correct antenna ID ensures that 58 ch 5 290 GHz the access point s radio transmissions are within regulatory ch a a li power limits for the country of operation Default 3Com Integrated Antenna NOTE The Antenna ID must be selected in conjunction with the Output Antenna to configure proper use of any of the antenna options Output Antenna Selects the use of both fixed antennas operating in diversity mode or a single antenna Default Diversity a Both The radio uses both antennas in a diversity system Select this method when the Antenna ID is set to 3Com Integrated Antenna to use the access point s integrated antennas a Right To activate the 5 GHz external antenna one must select the right antenna in the antenna selection UI a Left To activate the 2 4 GHz external antenna one must select the left antenna in the antenna selection Ul Transmit Power Adjusts the power of the radio signals transmitted from the access point The higher the transmission power the farther the transmission range Power selection is not just a trade off between coverage area and maximum supported clients You also have to ensure that high power signals do not interfere with the operation of other radio devices in the service area Options 100 50 25 12 minimum Default 100 CHAPTER 5 SYSTEM CONFIGURAT
30. a copy will be provided to you UNITED STATES GOVERNMENT LEGEND If you are a United States government agency then this documentation and the software described herein are provided to you subject to the following All technical data and computer software are commercial in nature and developed solely at private expense Software is delivered as Commercial Computer Software as defined in DFARS 252 227 7014 June 1995 or as a commercial item as defined in FAR 2 101 a and as such is provided with only such rights as are provided in 3Com s standard commercial license for the Software Technical data is provided with limited rights only as provided in DFAR 252 227 7015 November 1995 or FAR 52 227 14 June 1987 whichever is applicable You agree not to remove or deface any portion of any legend provided on any licensed program or documentation contained in or delivered to you in conjunction with this User Guide Unless otherwise indicated 3Com registered trademarks are registered in the United States and may or may not be registered in other countries 3Com the 3Com logo and SuperStack are registered trademarks of 3Com Corporation Wi Fi is a trademark of the Wireless Ethernet Compatibility Alliance All other company and product names may be trademarks of the respective companies with which they are associated EXPORT RESTRICTIONS This product contains Encryption and may require US and or Local Government authorization prior to
31. accounting 1813 Outdoor lla Building to Building config radius server timeout interim This command sets the interval between transmitting accounting updates to the RADIUS server Syntax radius server secondary timeout interim lt number_of_seconds gt e secondary Secondary server e number_of_seconds Number of seconds the access point waits between transmitting accounting updates Range 60 86400 Default Setting 3600 Command Mode Global Configuration Command Usage e The access point sends periodic accounting updates after every interim period until the user logs off and a stop message is sent Example Outdoor lla Building to Building config radius server timeout interim 500 Outdoor lla Building to Building config radius server radius mac format This command sets the format for specifying MAC addresses on the RADIUS server CHAPTER 6 COMMAND LINE INTERFACE Syntax radius server radius mac format lt multi colon multi dash no delimiter single dash gt e multi colon Enter MAC addresses in the form xx xx xX XX XXIXX e multi dash Enter MAC addresses in the form xx xx XX XX XX XX e no delimiter Enter MAC addresses in the form xxxxxxXxxxXxxx e single dash Enter MAC addresses in the form XXXXXX XXXXXX Default Setting No delimiter Command Mode Global Configuration Example Outdoor lla Building to Building config radius server radius mac format multi dash Outdoor lla Building t
32. also offers backward compatibility with WPA Therefore WPA2 includes the same 802 1X and PSK modes of operation and support for TKIP encryption The main differences and enhancements in WPA2 can be summarized as follows a Advanced Encryption Standard AES WPA2 uses AES Counter Mode encryption with Cipher Block Chaining Message Authentication Code CBC MAC for message integrity The AES Counter Mode CBCMAC Protocol AES CCMP provides extremely robust data confidentiality using a 128 bit key The AES CCMP encryption cipher is specified as a standard requirement 5 58 Security for WPA2 However the computational intensive operations of AES CCMP requires hardware support on client devices Therefore to implement WPAZ in the network wireless clients must be upgraded to WPA2 compliant hardware a WPA2 Mixed Mode WPA2 defines a transitional mode of operation for networks moving from WPA security to WPA2 WPA2 Mixed Mode allows both WPA and WPA2 clients to associate to a common SSID interface In mixed mode the unicast encryption cipher TKIP or AES CCMP is negotiated for each client The access point advertises its supported encryption ciphers in beacon frames and probe responses WPA and WPA2 clients select the cipher they support and return the choice in the association request to the access point For mixed mode operation the cipher used for broadcast frames is always TKIP WEP encryption is not allowed a Key Caching WPA2 provides
33. an access point VAP interface Default 3Com1 to 3Com4 for 802 11a 3Com5 to 3Com8 for 802 11b g Range 1 32 characters Default VLAN ID The VLAN ID assigned to wireless clients associated to the VAP interface that are not assigned to a specific VLAN by RADIUS server configuration Default 1 Radio Interface Closed System When enabled the VAP interface does not include its SSID in beacon messages Nor does it respond to probe requests from clients that do not include a fixed SSID Default Disable Maximum Associations This command configures the maximum number of clients that can be associated with the access point at the same time Authentication Timeout Interval The time within which the client should finish authentication before authentication times out Range 5 60 minutes Default 60 minutes Association Timeout Interval The idle time interval when no frames are sent after which a client is disassociated from the VAP interface Range 5 60 minutes Default 30 minutes CONFIGURING COMMON RADIO SETTINGS To configure common radio settings select the Radio Settings page and scroll down to below the VAP radio settings Figure 31 Radio Settings A and B G Country Code UNITED STATES Description Enterprise 602 110 Access Poirt Turbo Mode Disable O Enable Super Mode Disable Enable Auto Channel Select Disable Enable Radio Channel Antenna ID The original antenna pro
34. category Default Disabled Key Type See Wired Equivalent Privacy WEP CHAPTER 5 SYSTEM CONFIGURATION SECURITY The access point is configured by default as an open system which broadcasts a beacon signal including the configured SSID Wireless clients with an SSID setting of any can read the SSID from the beacon and automatically set their SSID to allow immediate connection to the nearest access point To improve wireless network security you have to implement two main functions a Authentication It must be verified that clients attempting to connect to the network are authorized users a Traffic Encryption Data passing between the access point and clients must be protected from interception and eavesdropping For a more secure network the access point can implement one or a combination of the following security mechanisms a Wired Equivalent Privacy WEP page 5 50 a IEEE 802 1x page 5 57 a Wireless MAC address filtering page 5 12 a Wi Fi Protected Access WPA or WPA2 page 5 57 Both WEP and WPA security settings are configurable separately for each virtual access point VAP interface MAC address filtering and RADIUS server settings are global and apply to all VAP interfaces The security mechanisms that may be employed depend on the level of security required the network and management resources available and the software support provided on wireless clients Asummary of wireless security con
35. checks the Ethernet type on all incoming and outgoing Ethernet packets against the protocol filtering table Use the no form to disable this feature Syntax no filter ethernet type enable Default Disabled Command Mode Global Configuration Command Usage This command is used in conjunction with the filter ethernet type protocol command to determine which Ethernet protocol types are to be filtered Example Outdoor lla Building to Building config filter ethernet type enable Outdoor lla Building to Building config Related Commands filter ethernet type protocol 6 87 Using the Command Line Interface filter ethernet type protocol This command sets a filter for a specific Ethernet type Use the no form to disable filtering for a specific Ethernet type Syntax filter ethernet type protocol lt protoco gt no filter ethernet type protocol lt protoco gt protocol An Ethernet protocol type Options ARP RARP Berkeley Trailer Negotiation LAN Test X25 Level 3 Banyan CDP DEC XNS DEC MOP Dump Load DEC MOP DEC LAT Ethertalk Appletalk ARP Novell IPX old Novell IPX new EAPOL Telxon TXP Aironet DDP Enet Config Test IP IPv6 NetBEUI PPPoE_Discovery PPPoE_PPP_Session Default None Command Mode Global Configuration Command Usage Use the filter ethernet type enable command to enable filtering for Ethernet types specified in the filtering table or the no filter ethernet type enable command to disa
36. configured on the RADIUS server Table 20 MAC Address Authentication Command Function Mode Page address filter default Sets filtering to allow or deny listed addresses GC 6 79 address filter entry Enters a MAC address in the filter table GC 6 79 address filter delete Removes a MAC address from the filter table GC 6 81 mac authentication server Sets address filtering to be performed with local or GC 6 81 remote options 6 78 Using the Command Line Interface Command Function Mode Page mac authentication Sets the interval at which associated clients will be GC 6 82 session timeout re authenticated with the RADIUS server authentication database show authentication Shows all 802 1X authentication settings as well as the Exec 6 76 address filter table address filter default This command sets filtering to allow or deny listed MAC addresses Syntax address filter default lt allowed denied gt e allowed Only MAC addresses entered as denied in the address filtering table are denied e denied Only MAC addresses entered as allowed in the address filtering table are allowed Default allowed Command Mode Global Configuration Example Outdoor lla Building to Building config address filter default denied Outdoor lla Building to Building config Related Commands address filter entry 6 79 802 1x supplicant user 6 76 address filter entry This command enters a MAC address in the filter table Synta
37. country This command configures the access point s country code which identifies the country of operation and sets the authorized radio channels 6 13 CHAPTER 6 COMMAND LINE INTERFACE Syntax country lt country_code gt country_code A two character code that identifies the country of operation See the following table for a full list of codes Table 12 Country Codes Country Code Country Code Country Code Country Code Albania AL Dominican DO Kuwait KW Romania RO Republic Algeria DZ Ecuador EC Latvia LV Russia RU Argentina AR Egypt EG Lebanon LB Saudi Arabia SA Armenia AM Estonia EE Liechtenstein LI Singapore SG Australia AU Finland FI Lithuania LT Slovak Republic SK Austria AT France FR Macao MO Spain ES Azerbaijan AZ Georgia GE Macedonia K Sweden SE Bahrain BH Germany DE Malaysia y Switzerland CH Belarus BY Greece GR Malta MT Syria SY Belgium BE Guatemala GT Mexico X Taiwan TW Honduras HN Monaco C Thailand TH Belize BZ Hong Kong HK Morocco A Trinidad amp TT Tobago Bolivia BO Hungary HU Netherlands NL Tunisia TN Brazil BR Iceland IS New Zealand NZ Turkey TR Brunei BN India IN Norway NO Ukraine UA Darussalam Bulgaria BG Indonesia ID Qatar QA United Arab AE Emirates Canada CA Iran IR Oman OM United Kingdom GB Chile CL Ireland IE Pakistan PK United States US China CN Israel IL Panama PA Uruguay UY Colombia co Italy IT Peru PE Uzbekistan UZ Costa Rica CR Japan JP Philippines PH Yemen YE Croatia HR Jorda
38. during alignment the radio signal from the remote antenna can be seen to have a strong central main lobe and smaller side lobes The object of the alignment process is to set the antenna so that it is receiving the strongest signal from the central main lobe AVertical Scan A Main Lobe lt lt Maximum RSSI Voltage RSSI Voltage Side Lobe 4 Maximum Maximum Signal Strength Position for Horizontal Alignment Maximum Signal 4 i gt 1 Strength Position for Vertical Alignment To align the antennas in the link monitor the signal strength LEDs or the RSSI value in the management interface Start with one antenna fixed and then perform the following procedure on the other antenna i NOTE The RSSI output can be configured through management interfaces to output a value for specific WDS ports See page 6 40 for more information big High 11a Signal gt DOL 1aCQ O l 11bl Medium 11a Signal gt j Si a O big Low 11a Signal p CULO 1aQ O OZO O 0 1 Pan the antenna horizontally back and forth while checking the LEDs If using the pole mounting bracket with the unit you must rotate the mounting bracket around the pole Other external antenna brackets may require a different horizontal adjustment 2 Find the point where the signal is strongest all LEDs on and secure the horizontal adjustment in that position NOTE Sometimes t
39. enable VAP interfaces 1 2 3 4 5 6 or 7 Example Outdoor lla Building to Building if wireless g VAP 0 shutdown Outdoor lla Building to Building if wireless g show interface wireless This command displays the status for the wireless interface Syntax show interface wireless lt a g gt vap id e a 802 11a radio interface e g 802 119 radio interface e vap id The number that identifies the VAP interface Options 0 3 6 129 CHAPTER 6 COMMAND LINE INTERFACE Command Mode Exec Example Outdoor lla Building to Building show interface wireless g 0 Wireless Interface Information Description SSID Channel Status MAC Address Radio Mode Protection Method Transmit Power Max Station Data Rate Multicast Data Rate Fragmentation Threshold RTS Threshold Beacon Interval Authentication Timeout Interval Association Timeout Interval DTIM Interval Preamble Length Maximum Association MIC Mode Super G VLAN ID 6 130 Enterprise 802 1llg Access Point VAP_G 0 1 AUTO ENABLED 00 03 7 fe 03 02 b amp g mixed mode CTS only FULL 16 dBm 54Mbps 5 5Mbps 2346 bytes 2347 bytes 100 TUs 60 Mins 30 Mins 1 beacon LONG 64 stations Software Disabled el aia aa ania a a aR a CR a Securty sri e n es Closed System Disabled Multicast cipher WEP Unicast cipher TKIP and AES WPA clients DISABLED WPA Key Mgmt Mode PRE SHARED KEY WPA PSK Key Type PASSPHRASE WPA PSK Key EMP
40. for all devices to transmit data from any type of application Although this is acceptable for most applications multimedia applications with audio and video are particularly sensitive to the delay and throughput variations that result from this equal opportunity wireless access method For multimedia applications to run well over a wireless network a Quality of Service QoS mechanism is required to prioritize traffic types and provide an enhanced opportunity wireless access method 5 45 CHAPTER 5 SYSTEM CONFIGURATION The access point implements QoS using the Wi Fi Multimedia WMM standard Using WMM the access point is able to prioritize traffic and optimize performance when multiple applications compete for wireless network bandwidth at the same time WMM employs techniques that are a subset of the developing IEEE 802 11e QoS standard and it enables the access point to inter operate with both WMMenabled clients and other devices that may lack any WMM functionality Access Categories WMM defines four access categories ACs voice video best effort and background These categories correspond to traffic priority levels and are mapped to IEEE 802 1D priority tags The direct mapping of the four ACs to 802 1D priorities is specifically intended to facilitate inter operability with other wired network QoS policies While the four ACs are specified for specific types of traffic WMM allows the priority levels to be configured to match an
41. half quarter eighth min Default Setting full Command Mode Interface Configuration Wireless Command Usage e The min keyword indicates minimum power e The longer the transmission distance the higher the transmission power required But to support the maximum number of users in an area you must keep the power as low as possible Power selection is not just a trade off between coverage area and maximum supported clients You also have to ensure that high strength signals do not interfere with the operation of other radio devices in your area Example Outdoor lla Building to Building if wireless g transmit power half Outdoor 1la Building to Building if wireless g radio mode This command forces the operating mode for the 802 11g wireless interface Syntax radio mode lt b g b g gt e b b only mode Both 802 11b and 802 11g clients can communicate with the access point but 802 11g clients can only transfer data at 802 11b standard rates up to 11 Mbps e g g only mode Only 802 1 1g clients can communicate with the access point up to 54 Mbps e b g b amp g mixed mode Both 802 11b and 802 11g clients can communicate with the access point up to 54 Mbps 6 117 CHAPTER 6 COMMAND LINE INTERFACE Default Setting b g mode Command Mode Interface Configuration Wireless 802 119 Command Usage e For Japan only 13 channels are available when set to g or b g modes When set to b mode 14 ch
42. no equivalent CLI commands for the RSSI controls RADIO INTERFACE The IEEE 802 11a and 802 11g interfaces include configuration options for radio signal characteristics and wireless security features The configuration options are nearly identical and are therefore both covered in this section of the manual The access point can operate in three modes IEEE 802 11a only 802 11b g only or a mixed 802 11a b g mode Also note that 802 11g is backward compatible with 802 1 1b These interfaces are configured independently under the following web pages a 802 11a Interface a 802 1 1b g Interface Each radio supports up to four virtual access point VAP interfaces numbered 1to 4 Each VAP functions as a separate access point and can be configured with its own Service Set Identification SSID and security settings However most radio signal parameters apply to all four VAP interfaces The VAPs function similar to a VLAN with each VAP mapped to its own VLAN ID Traffic to specific VAPs can be segregated based on user groups or application traffic allowed in the US Canada If you live in an area where additional channels are allowed go to the 3Com web site http www 3com com and download the latest software that will allow additional channels in your country fi NOTE The 8760 Access Point ships from the factory enabled only for channels CHAPTER 5 SYSTEM CONFIGURATION 802 11A INTERFACE The IEEE 802 11a interface operates with
43. of the V shaped part into the slots in the rectangular plate and tighten the nuts Fit the edges of the V shaped part into the slots 3 Attach the adjustable rectangular plate to the bridge with supplied screws x TE Attach the lt a adjustable ia rectangular plate to the bridge 3 3 4 Attach the bridge with bracket to the plate already fixed to the pole Attach the bridge to the plate on the pole 5 Use the included nuts to secure the wireless bridge to the pole bracket Note that the wireless bridge tilt angle may need to be adjusted during the antenna alignment process Be sure to take account of the antenna polarization direction all antennas in a link must be mounted with the same polarization USING THE WALL MOUNTING BRACKET Perform the following steps to mount the unit to a wall using the wall mounting bracket intrgrated antenna to be aligned It is intended for use with the unit using an CAUTION The wall mounting bracket does not allow the wireless bridge s external antenna 3 4 1 Always attach the bracket to a wall with flat side flush against the wall see following figure 2 Position the bracket in the intended location and mark the position of the four mounting screw holes 3 Drill four holes in the wall that match the screws and wall plugs included in the bracket kit then secure the bracket to the wall 4 Use the included nuts to tig
44. operate in one of the following four modes Default AP e AP Access Point Operates as an access point for wireless clients providing connectivity to a wired LAN Bridge Operates as a bridge to other access points The Parent link to the root bridge must be configured Up to five other Child links are available to other bridges Repeater Operates as a wireless repeater extending the range for remote wireless clients and connecting them to the root bridge The Parent link to the root bridge must be configured In this mode traffic is not forwarded to the Ethernet port from the radio interface CHAPTER 5 SYSTEM CONFIGURATION e Root Bridge Operates as the root bridge in the wireless bridge network Up to six Child links are available to other bridges in the network Master Slave Mode Selects between Master and Slave mode A single master enables up to five slave links whereas a slave will have only one link to the master Channel Auto Sync This command allows a child bridge to automatically find the operating channel of its parent bridge CAUTION Do not enable Channel Auto Sync on a master bridge if there is no root bridge acting as the master bridge s parent Bridge Parent The physical layer address of the root bridge unit or the bridge unit connected to the root bridge 12 hexadecimal digits in the form XX XX XX XX XX XX Bridge Child The physical layer address of other br
45. standard provides for data rates of 6 9 11 12 18 24 36 48 54 Mbps IEEE 802 11g is also backward compatible with IEEE 802 11b IEEE 802 1X Port Authentication controls access to the switch ports by requiring users to first enter a user ID and password for authentication Infrastructure An integrated wireless and wired LAN is called an infrastructure configuration Inter Access Point Protocol IAPP A protocol that specifies the wireless signaling required to ensure the successful handover of wireless clients roaming between different 802 11f compliant access points Local Area Network LAN A group of interconnected computer and support devices MAC Address The physical layer address used to uniquely identify network nodes Network Time Protocol NTP NTP provides the mechanisms to synchronize time across the network The time servers operate in a hierarchical master slave configuration in order to synchronize local clocks within the subnet and to national time standards via wire or radio Open System A security option which broadcasts a beacon signal including the access point s configured SSID Wireless clients can read the SSID from the beacon and automatically reset their SSID to allow immediate connection to the nearest access point Orthogonal Frequency Division Multiplexing ODFM OFDW allows multiple users to transmit in an allocated band by dividing the bandwidth into many narrow bandwidth carriers Po
46. the access point 6 63 CHAPTER 6 COMMAND LINE INTERFACE Example This example shows how to delete the test cfg configuration file from flash memory Outdoor lla Building to Building delete test cfg Are you sure you wish to delete this file lt y n gt Outdoor lla Building to Building Related Commands bootfile 6 61 dir 6 64 dir This command displays a list of files in flash memory Command Mode Exec Command Usage File information is shown below Column Heading Description File Name The name of the file Type 2 Operation Code and 5 Configuration file File Size The length of the file in bytes Example The following example shows how to display all file information Outdoor lla Building to Building dir File Name Type File Size dflt img bin 2 1044140 syscfg 5 16860 syscfg_bak 5 16860 zz img bin 2 1044140 1048576 byte s available Outdoor lla Building to Building 6 64 Using the Command Line Interface show boottfile This command displays the name of the current operation code file that booted the system Syntax show snmp filter assignments Command Mode Exec Example Outdoor lla Building to Building show bootfile Bootfile Information Outdoor lla Building to Building RADIUS Client Remote Authentication Dial in User Service RADIUS is a logon authentication protocol that uses software running on a central server to control access for RADIUS aware devices t
47. the no form to restore the default IP address Syntax ip address lt ip address gt lt netmask gt lt gateway gt no ip address e jo address IP address e netmask Network mask for the associated IP subnet This mask identifies the host address bits used for routing to specific subnets e gateway IP address of the default gateway Default Setting IP address 192 254 2 1 Netmask 255 255 255 0 Command Mode Interface Configuration Ethernet Command Usage e DHCP is enabled by default To manually configure a new IP address you must first disable the DHCP client with the no ip dhcp command e You must assign an IP address to this device to gain management access over the network or to connect the access point to existing IP subnets You can manually configure a specific IP address using this command or direct the device to obtain an address from a DHCP server using the ip dhcp command Valid IP addresses consist of four numbers 0 to 255 separated by periods Anything outside this format will not be accepted by the configuration program Example Outdoor lla Building to Building config interface ethernet Enter Ethernet configuration commands one per line Outdoor lla Building to Building if ethernet ip address 192 254 2 1 255255 2550 192 2542 253 Outdoor lla Building to Building if ethernet Related Commands ip dhcp 6 108 6 107 CHAPTER 6 COMMAND LINE INTERFACE ip dhcp This command enables th
48. to generate host encryption keys The SSH server is disabled while the keys are being generated The show system command displays the status of the SSH server Example Outdoor 11a Building to Building if ethernet ip ssh server enable Outdoor 11a Building to Building if ethernet ip ssh server port This command sets the Secure Shell server port Use the no form to disable the server Syntax ip ssh server port lt port number gt e port number The UDP port used by the SSH server Range 1 65535 Default Setting 22 Command Mode Interface Configuration Ethernet Example Outdoor 11a Building to Building if ethernet ip ssh server port 1124 Outdoor 11a Building to Building if ethernet ip telnet server enable This command enables the Telnet server Use the no form to disable the server Syntax ip telnet server enable no ip telnet server Default Setting Interface enabled Using the Command Line Interface Command Mode Interface Configuration Ethernet Example Outdoor 11a Building to Building if ethernet ip telnet server enable Outdoor 11a Building to Building if ethernet ip http port This command specifies the TCP port number used by the web browser interface Use the no form to use the default port Syntax ip http port lt port number gt no ip http port port number The TCP port to be used by the browser interface Range 1024 65535 Default Setting 80 Command Mode Global Config
49. v3 notification filters to targets GC 6 56 filter assignments show snmp groups Displays the pre defined SNMP v3 groups Exec 6 56 show snmp users Displays SNMP v3 user settings Exec 6 57 show snmp Displays the assignment of users to SNMP v3 groups Exec 6 57 group assignments show snmp target Displays the SNMP v3 notification targets Exec 6 58 6 44 Using the Command Line Interface Command Function Mode Page show snmp filter Displays the SNMP v3 notification filters Exec 6 58 show snmp Displays the SNMP v3 notification filter assignments Exec 6 59 filter assignments show snmp Displays the status of SNMP communications Exec 6 60 6 45 CHAPTER 6 COMMAND LINE INTERFACE snmp server community This command defines the community access string for the Simple Network Management Protocol Use the no form to remove the specified community string Syntax snmp server community string ro rw no snmp server community string e string Community string that acts like a password and permits access to the SNMP protocol Maximum length 23 characters case sensitive e ro Specifies read only access Authorized management stations are only able to retrieve MIB objects e rw Specifies read write access Authorized management stations are able to both retrieve and modify MIB objects Default Setting e public Read only access Authorized management stations are only able to retrieve MIB objects e private Read write acce
50. 0 14 00 January 1 1970 Command Mode Global Configuration Example This example sets the system clock to 17 37 June 19 2003 Outdoor lla Building to Building sntp server date time Enter Year lt 1970 2100 gt 2003 Enter Month lt 1 12 gt 6 Enter Day lt 1 31 gt 19 Enter Hour lt 0 23 gt 17 Enter Min lt 0 59 gt 37 Outdoor lla Building to Building CHAPTER 6 COMMAND LINE INTERFACE Related Commands sntp server enable 6 38 sntp server daylight saving This command sets the start and end dates for daylight savings time Use the no form to disable daylight savings time Syntax no sntp server daylight saving Default Setting Disabled Command Mode Global Configuration Command Usage The command sets the system clock back one hour during the specified period Example This sets daylight savings time to be used from July 1st to September 1st Outdoor lla Building to Building config sntp server daylight saving Enter Daylight saving from which month lt 1 12 gt 6 and which day lt 1 31 gt 1 Enter Daylight saving end to which month lt 1 12 gt 9 and which day lt 1 31 gt 1 Outdoor lla Building to Building config sntp server timezone This command sets the time zone for the access point s internal clock Syntax sntp server timezone lt hours gt hours Number of hours before after UTC Range 12 to 12 hours Default Setting 5 BOGOTA EASTERN INDIANA Using the Command Line Interface Command
51. 11b g 1 2 5 5 6 9 11 12 18 24 36 48 54 Mbps Default Setting 54 Mbps Command Mode Interface Configuration Wireless Command Usage e The maximum transmission distance is affected by the data rate The lower the data rate the longer the transmission distance Please refer to the table for maximum distances on page 6 e When turbo mode is enabled page 126 for 802 11a the effective maximum speed specified by this command is double the entered value 6 113 CHAPTER 6 COMMAND LINE INTERFACE e g setting the speed to 54 Mbps limits the effective maximum speed to 108 Mbps Example Outdoor lla Building to Building if wireless g speed 6 Outdoor 1la Building to Building if wireless g turbo This command sets the access point to an enhanced proprietary modulation mode not regulated in IEEE 802 11a that provides a higher data rate of up to 108 Mbps Syntax turbo lt static dynamic gt no turbo static Always uses turbo mode dynamic Will use turbo mode when no other nearby access points are detected or active Default Setting Disabled Command Mode Interface Configuration Wireless 802 11a Command Usage e The normal 802 11a wireless operation mode provides connections up to 54 Mbps Turbo Mode is an enhanced mode not regulated in IEEE 802 11a that provides a higher data rate of up to 108 Mbps Enabling Turbo Mode allows the access point to provide connections up to 108 Mbps e In norma
52. 2 Temporal Key Integrity Protocol See TKIP time zone 5 35 6 40 TKIP 5 58 transmit power configuring 5 41 6 117 trap destination 5 20 6 48 trap manager 5 20 6 48 U upgrading software 5 25 6 62 user name manager 5 24 6 16 user password 5 24 6 16 6 17 V VLAN configuration 5 38 6 156 native ID 5 38 W WEP 5 53 configuring 5 53 shared key 5 57 6 143 Wi Fi Multimedia See WMM Wi Fi Protected Access See WPA Wired Equivalent Protection See WEP WPA 5 57 pre shared key 6 147 Index 9 WPA pre shared key See PSK
53. 2 management interface from wireless clients and filters traffic using specific Ethernet protocol types 6 7 CHAPTER 6 COMMAND LINE INTERFACE Command Group Description Page WDS Bridge Configures WDS forwarding table settings 6 88 Spanning Tree Configures spanning tree parameters 6 99 Ethernet Interface Configures connection parameters for the Ethernet interface 6 105 Wireless Interface Configures radio interface settings 6 111 Wireless Security Configures radio interface security and encryption settings 6 133 Rogue AP Detection Configures settings for the detection of rogue access points in the 6 133 network Link Integrity Configures a link check to a host device on the wired network 6 150 IAPP Enables roaming between multi vendor access points 6 153 VLANs Configures VLAN membership 6 154 WMM Configures WMM quality of service parameters 6 158 The access mode shown in the following tables is indicated by these abbreviations Exec Executive Mode GC Global Configuration IC E Interface Ethernet Configuration IC W Interface Wireless Configuration and IC W VAP Interface Wireless VAP Configuration General Commands Table 10 General Commands Command Function Mode Page configure Activates global configuration mode Exec 6 8 end Returns to previous configuration mode GC IC 6 9 exit Returns to the previous configuration mode or exits the CLI any 6 10 ping Sends ICMP echo request packets to another node on the Exec 6 10
54. 2 1x Setup Disable 802 1x authentications not allowed Supported Clients may or may not use 802 1x O Required Client must use 802 1x if 802 1x supported or required is selected then RADIUS setup must be completed Broadcast Key Refresh Rate 0 minutes 0 Disabled Session Key Refresh Rate 0 minutes 0 Disabled 802 1x Reauthentication Refresh Rate 0 minutes 0 Disabled 802 1x Supplicant Setup O Enable Supplicant authentications allowed Local MAC Authentication System Default O Deny Allow Deny Allow Delete NA 3 2e MAC Authentication You can configure a list of the MAC addresses for wireless clients that are authorized to access the network This provides a basic level of authentication for wireless clients attempting to gain access to the network A database of authorized MAC addresses can be stored locally on the access point or remotely on a central RADIUS server Default Disabled a Disabled No checks are performed on an associating station s MAC address a Local MAC The MAC address of the associating station is compared against the local database stored on the access point Use the Local MAC 5 12 Authentication Authentication section of this web page to set up the local database and configure all access points in the wireless network service area with the same MAC address database a Radius MAC The MAC address of the associating station is sent to a confi
55. 2 alphanumeric characters e password The MD5 password used for access point authentication Range 1 32 alphanumeric characters Default None Command Mode Global Configuration Command Usage The access point currently only supports EAP MD5 CHAP for 802 1X supplicant authentication Example Outdoor lla Building to Building config 802 1x supplicant user AP8760 dotlxpass Outdoor lla Building to Building config show authentication This command shows all 802 1X authentication settings as well as the address filter table CHAPTER 6 COMMAND LINE INTERFACE Command Mode Exec Example Outdoor lla Building to Building show authentication Authentication Information MAC Authentication Server DISABLED MAC Auth Session Timeout Value 0 min 802 1x supplicant DISABLED 802 1x supplicant user EMPTY 802 1x supplicant password EMPTY Address Filtering ALLOWED System Default ALLOW addresses not found in filter table Filter Table MAC Address Status 00 70 50 cc 99 1a DENIED 00 70 50 cc 99 1b ALLOWED Outdoor lla Building to Building config MAC Address Authentication Use these commands to define MAC authentication on the access point For local MAC authentication first define the default filtering policy using the address filter default command Then enter the MAC addresses to be filtered indicating if they are allowed or denied For RADIUS MAC authentication the MAC addresses and filtering policy must be
56. 3COM User Guide 3Com Outdoor 11a Building to Building Bridge and 11bg Access Point 3CRWEASYA73 WL 575 www 3Com com Part Number 10015232 Rev AA Published August 2006 3Com Corporation 350 Campus Drive Marlborough MA 01752 3064 Copyright 2006 3Com Corporation All rights reserved No part of this documentation may be reproduced in any form or by any means or used to make any derivative work such as translation transformation or adaptation without written permission from 3Com Corporation 3Com Corporation reserves the right to revise this documentation and to make changes in content from time to time without obligation on the part of 3Com Corporation to provide notification of such revision or change 3Com Corporation provides this documentation without warranty term or condition of any kind either implied or expressed including but not limited to the implied warranties terms or conditions of merchantability satisfactory quality and fitness for a particular purpose 3Com may make improvements or changes in the product s and or the program s described in this documentation at any time If there is any software on removable media described in this documentation it is furnished under a license agreement included with the product as a separate document in the hard copy documentation or on the removable media in a directory file named LICENSE TXT or LICENSE TXT If you are unable to locate a copy please contact 3Com and
57. 8 38 12 Outdoor lla Building to Building show hardware This command displays the hardware version of the system Command Mode Exec Example Outdoor lla Building to Building show hardware Hardware Version Information Outdoor lla Building to Building System Logging Commands These commands are used to configure system logging on the access point Table 13 System Loggign Commands Command Function Mode Page logging on Controls logging of error messages GC 6 33 logging host Adds a syslog server host IP address that will receive GC 6 33 logging messages logging console Initiates logging of error messages to the console GC 6 34 logging level Defines the minimum severity level for event logging GC 6 34 logging facility type Sets the facility type for remote logging of syslog GC 6 35 messages logging clear Clears all log entries in access point memory GC 6 36 show logging Displays the state of logging Exec 6 36 show event log Displays all log entries in access point memory Exec 6 37 6 32 Using the Command Line Interface logging on This command controls logging of error messages i e sending debug or error messages to memory The no form disables the logging process Syntax no logging on Default Setting Disabled Command Mode Global Configuration Command Usage The logging process controls error messages saved to memory You can use the logging level command to control the type of error messages th
58. AC Address The physical layer address for the Ethernet port System Name Name assigned to this system System Country Code The country for which the device has been set for use a System Contact Administrator responsible for the system a P Address IP address of the management interface for this device a P Default Gateway IP address of the gateway router between this device and management stations that exist on other network segments 5 60 Security a HTTP Server Shows if management access via HTTP is enabled a HTTP Server Port Shows the TCP port used by the HTTP interface a Version Shows the software version number a 802 1X Shows if IEEE 802 1X access control for wireless clients is enabled AP Wireless Configuration The AP Wireless Configuration tables display the radio and VAP interface settings listed below Note that Interface Wireless A refers to the 802 11a radio and Interface Wireless G refers the 802 11b g radio a VAP Displays the VAP number a Radio Status Displays if the radio is enabled or disabled for this VAP a SSID The service set identifier for the VAP interface a Radio Channel The radio channel through which the access point communicates with wireless clients a Radio Encryption The key size used for data encryption a Radio Auth Type Shows the type of authentication used a Output Antenna Displays which antenna e are in use by the VAP a MAC The physical layer address of the ra
59. C address authentication for a small network with a limited number of users MAC addresses can be manually configured on the access point itself without the need to set up a RADIUS server but managing a large number of MAC addresses across many access points is very cumbersome A RADIUS server can be used to centrally manage a larger database of user MAC addresses a Use IEEE 802 1X authentication for networks with a larger number of users and where security is the most important issue When using 802 1X authentication a RADIUS server is required in the wired network to centrally manage the credentials of the wireless clients It also provides a mechanism for enhanced network security using dynamic encryption key rotation or W Fi Protected Access WPA NOTE If you configure RADIUS MAC authentication together with 802 1X RADIUS MAC address authentication is performed prior to 802 1X authentication If RADIUS MAC authentication succeeds then 802 1X authentication is performed If RADIUS MAC authentication fails 802 1X authentication is not performed CHAPTER 5 SYSTEM CONFIGURATION SYSTEM e identification e TCPHP Settings RADIUS Authentication Filter Control SNMP Administration e WOSISTP Settings e Syslog Set up e RSSI Status 802 11a Interface e Radio Settings e Security 802 11b Interface Radio Settings Security Figure 16 Authentication 8 Authentication MAC Authentication Disoble 80
60. DIO S ENABLED Outdoor lla Building to Building config show link integrity This command displays the current link integrity configuration Command Mode Exec Example Outdoor lla Building to Building show link integrity Link Integrity Information Ethernet Detect Enabled Ping Detect Enabled Target IP Name 192 254 0 140 Ping Fail Retry 6 Ping Interval 3 3 0 Outdoor lla Building to Building IAPP Commands The command described in this section enables the protocol signaling required to ensure the successful handover of wireless clients roaming between different 802 11f compliant access points In other words the 802 11f protocol can ensure successful roaming between access points in a multi vendor environment 6 153 CHAPTER 6 COMMAND LINE INTERFACE iapp This command enables the protocol signaling required to hand over wireless clients roaming between different 802 11f compliant access points Use the no form to disable 802 11f signaling Syntax no iapp Default Enabled Command Mode Global Configuration Command Usage The current 802 11 standard does not specify the signaling required between access points in order to support clients roaming from one access point to another In particular this can create a problem for clients roaming between access points from different vendors This command is used to enable or disable 802 11f handover signaling between different access points especially in
61. Default Gateway VLAN State Management VLAN ID AP IAPP State DHCP Client HTTP Server HTTP Server Port HTTPS Server HTTPS Server Port Slot Status Boot Rom Version Software Version SSH Server SSH Server Port Telnet Server WEB Redirect DHCP Relay Proxy ARP A123456789 0 days Enterprise Wireless AP 4 hours 33 minutes 29 seconds US UNITED STATES 00 30 F1 F0 9A 9C 192 254 2 1 2004200425060 0 0 0 0 DISABLED 1 ENABLED ENABLED ENABLED 80 ENABLED 443 Dual band a g WBa QES v4 3 1 9 ENABLED 22 ENABLED DISABLED DISABLED DISABLED Outdoor lla Building to Building 6 26 Using the Command Line Interface show version This command displays the software version for the system Command Mode Exec Example Outdoor lla Building to Building show version Version Information Version v4 3 2 2 Date Dec 20 2005 18 38 12 Outdoor lla Building to Building show config This command displays detailed configuration information for the system Command Mode Exec Example Outdoor lla Building to Building show config Authentication Information MAC Authentication Server DISABLED MAC Auth Session Timeout Value 0 min 802 1x supplicant DISABLED 802 1x supplicant user EMPTY 802 1x supplicant password EMPTY Address Filtering ALLOWED System Default ALLOW addresses not found in filter table Filter Table No Filter Entries Bootfile Information 6 27 CHAPTE
62. Default Setting 19 Command Mode Interface Configuration Command Usage e This command is used by the Spanning Tree Protocol to determine the best path between devices Therefore lower values should be assigned to ports attached to faster media and higher values assigned to ports with slower media e Path cost takes precedence over port priority 6 103 CHAPTER 6 COMMAND LINE INTERFACE Example Outdoor lla Building to Building if wireless a bridge link path cost 1 50 Outdoor lla Building to Building if wireless a bridge link port priority Use this command to configure the priority for the specified port Syntax bridge link port priority lt index gt lt priority gt e index Specifies the bridge link number on the wireless bridge Range 1 6 required on wireless interface only e priority The priority for a port Range 1 255 Default Setting 128 Command Mode Interface Configuration Command Usage e This command defines the priority for the use of a port in the Spanning Tree Protocol If the path cost for all ports on a wireless bridge are the same the port with the highest priority that is lowest value will be configured as an active link in the spanning tree e Where more than one port is assigned the highest priority the port with lowest numeric identifier will be enabled Example Outdoor lla Building to Building if wireless a bridge link port priority 1 64 Outdoor lla Building to Building if wirele
63. Fail Enabled dotlxAuthFail Enabled dot1lxAuthNotInitiated Enabled dotixAuthSuccess Enabled dot1lxMacAddrAuthFail Enabled dot1ixMacAddrAuthSuccess Enabled iappContextDataSent Enabled iappStationRoamedFrom Enabled iappStationRoamedTo Enabled localMacAddrAuthFail Enabled localMacAddrAuthSuccess Enabled pppLogonFail Enabled sntpServerFail Enabled configFileVersionChanged Enabled radiusServerChanged Enabled systemDown Enabled systemUp Enabled Outdoor lla Building to Building 6 60 Using the Command Line Interface Flash File Commands These commands are used to manage the system code or configuration files Table 17 Flash File Commands Command Function Mode Page bootfile Specifies the file or image used to start up the system GC 6 61 copy Copies a code image or configuration between flash Exec 6 62 memory and a FTP TFTP server delete Deletes a file or code image Exec 6 63 dir Displays a list of files in flash memory Exec 6 64 show bootfile Displays the name of the current operation code file Exec 6 65 that booted the system bootfile This command specifies the image used to start up the system Syntax bootfile lt filename gt filename Name of the image file Default Setting None Command Mode Exec Command Usage e The file name should not contain slashes or the leading letter of the file name should not be a period and the maximum length for file names is 32 characters Valid characters A Z a z
64. H You must consider the known maximum wind velocity and direction at the site and be sure that any supporting structure such as a pole mast or tower is built to withstand this force Lightning The wireless bridge includes its own built in lightning protection However you should make sure that the unit any supporting structure and cables are all properly grounded Additional protection using lightning rods lightning arrestors or surge suppressors may also be employed Rain The wireless bridge is weatherproofed against rain Also prolonged heavy rain has no significant effect on the radio signal However it is recommended to apply weatherproof sealing tape around the Ethernet port and antenna connectors for extra protection If moisture enters a connector it may cause a degradation in performance or even a complete failure of the link 2 7 e Snow and Ice Falling snow like rain has no significant effect on the radio signal However a build up of snow or ice on antennas may cause the link to fail In this case the snow or ice has to be cleared from the antennas to restore operation of the link ETHERNET CABLING When a suitable antenna location has been determined you must plan a cable route form the wireless bridge outdoors to the power injector module indoors Consider these points e The Ethernet cable length should never be longer than 100 m 328 ft e Determine a building entry point for the cable e Determine
65. IN ANTENNA The WL 575 bridge includes an integrated high gain 17 dBi flat panel antenna for 5 GHz operation With this antenna in a direct line of sight link using a point to point deployment the range can be as long as 15 km 9 3 miles with a 6 Mbps data rate EXTERNAL ANTENNA OPTIONS The WL 575 bridge also provides various external antenna options for both 5 GHz and 2 4 GHz operation In a point to multipoint configuration an external high gain omnidirectional sector or high gain panel antenna can be attached to communicate with bridges spread over a wide area The bridge requires a 2 4 GHz external antenna for 802 11b g operation The following table summarizes the external antenna options Item Antenna Type Gain dBi Horizontal Vertical HPBW HPBW 2 4GHz 5 0GHz Degrees Degrees 3CWE591 3Com 6 8 dBi Dual Band Omni 6 8 360 5GHz 20 2 4GHz 30 3CWE596 3Com 18 20 dBi Dual Band Panel 18 20 18 19 3CWE598 3Com 8 10 dBi Dual Band Panel 8 10 60 60 Half power beam width External antennas connect to the N type RF connectors on the wireless bridge using the optional RF coaxial cables Using the external antennas in a point to multipoint deployment the maximum range for bridge links are a 802 11b g 2 2 km a 802 11a 3 km ETHERNET PORT The wireless bridge has one 10BASE T 100BASE TX 8 pin DIN port that connects to the power injector module using the included Ethernet cable The Ethernet port connection provides
66. ION il NOTE When operating the access point using 5 GHz channels in a European Community country the end user and installer are obligated to operate the device in accordance with European regulatory requirements for Transmit Power Control TPC Maximum Transmit Data Rate The maximum data rate at which the access point transmits unicast packets on the wireless interface The maximum transmission distance is affected by the data rate The lower the data rate the longer the transmission distance Options 54 48 36 24 Mbps Default 54 Mbps Maximum Multicast Data Rate The maximum data rate at which the access point transmits multicast and broadcast packets on the wireless interface Options 24 12 6 Mbps Default 6 Mbps Beacon Interval The rate at which beacon signals are transmitted from the access point The beacon signals allow wireless clients to maintain contact with the access point They may also carry power management information Range 20 1000 TUs Default 100 TUs Delivery Traffic Indication Message DTIM The rate at which stations in sleep mode must wake up to receive broadcast multicast transmissions The DTIM interval indicates how often the MAC layer forwards broadcast multicast traffic which is necessary to wake up stations that are using Power Save mode The default value of 1 indicates that the access point will save all broadcast multicast frames for the Basic Service Set BSS and forward t
67. IP Address 192 168 1 2 255 255 255 0 00 14 7C 88 0220 Yes CHAPTER 4 INITIAL CONFIGURATION Directly connect to the device through its Ethernet port or console port Follow the instructions below to login into the AP Configuration screen 1 Load a web browser and enter lt http 169 254 2 1 gt 2 The Logon screen appears To log on to the Web interface 1 Username type admin case sensitive 2 Password type password 3 Click Log On FIRST TIME ONLY When you log in for the first time you may be asked to select your country Choose your country from the drop down list and then click Apply Click on the Setup Wizard for initial configuration For a new access point installation the default WLAN Service Area ESSID is 3Com and no security is set Unless it detects a DHCP server on the network the access point uses Auto IP to assign an IP address of the form 169 254 2 1 Use the 3Com Wireless Infrastructure Device Manager to locate 3Com Wireless LAN devices and launch their configurations When installing the device manager make sure the computer is connected to the same network as the device to be configured After installing and launching the device manager select the device to be configured from network tree and click Configure to launch the configuration Web interface USING THE SETUP WIZARD There are only a few basic steps you need to complete to connect the access point to your corporate network and provi
68. NS downloading software 5 25 6 62 DTIM 5 42 6 122 Dynamic Host Configuration Protocol See DHCP E EAP 5 57 encryption 5 50 5 53 5 57 Ethernet port 1 5 event logs 5 62 6 36 Extensible Authentication Protocol See EAP F factory defaults restoring 6 11 filter 5 15 6 79 address 5 10 6 79 between wireless clients 6 83 local bridge 6 83 local or remote 5 10 6 81 management access 5 16 6 85 protocol types 5 16 6 86 VLANs 5 38 6 154 firmware displaying version 5 27 6 27 upgrading 5 25 5 27 6 62 fragmentation 6 123 G gateway address 5 6 6 2 6 107 H hardware version displaying 6 27 HTTP secure server 6 21 HTTPS 6 21 l IAPP 6 153 IEEE 802 11a 1 2 5 37 6 112 configuring interface 5 38 6 112 maximum data rate 6 115 radio channel 6 116 IEEE 802 11b 5 37 IEEE 802 11f 6 153 IEEE 802 11g 5 37 configuring interface 5 43 6 112 maximum data rate 6 115 radio channel 5 45 6 116 IEEE 802 1x 5 57 6 71 6 78 configuring 5 10 6 71 initial setup 4 1 IP address BOOTP DHCP 6 107 6 108 configuring 4 8 5 5 6 107 6 108 P package checklist 1 3 password configuring 5 23 5 27 6 17 management 5 23 5 27 6 17 PoE 3 8 port priority STA 6 104 Power over Ethernet See PoE PSK 5 58 L log messages 5 34 5 62 6 33 server 5 33 6 33 login CLI 6 1 web 4 5 logon authentication RADIUS client 5 14 6 65 M MAC address authentication 5 12 6 79 maximum associated cl
69. Outdoor lla Building to Building logging clear config logging facility 19 config This command clears all log messages stored in the access point s memory Syntax logging clear Command Mode Global Configuration Example Outdoor lla Building to Building Outdoor lla Building to Building config logging clear config show logging This command displays the logging configuration Syntax show logging Command Mode Exec Example Outdoor lla Building Logging Information to Building show logging Syslog State Enabled Logging Console State Enabled Logging Level Alert Logging Facility Type 16 Servers 1 192 254 2 19 UDP Port 514 State Enabled 2 0 0 0 0 UDP Port 514 State Disabled 3 0 0 0 0 UDP Port 514 State Disabled 4 0 0 0 0 UDP Port 514 State Disabled to Building Outdoor lla Building 6 36 Using the Command Line Interface show event log This command displays log messages stored in the access point s memory Syntax show event log Command Mode Exec Example Outdoor lla Building to Building show event log Mar 09 137405 nformation 802 11g 11g Radio Interface Enabled Mar 09 Bao M eoas to nformation 802 11g Radio channel updated to 8 Mar 09 2 57 34 nformation 802 11g llg Radio Interface Enabled Mar 09 2h 18 nformation 802 11lg llg Radio Interface Enabled Mar 09 2 56 35 nformation 802 lla lla Radio Interface Enabled Mar 09 rood nformati
70. PAP Settings MOMP VEAR DAI e RADIUS VLAN Disable O Enable Authentication Filter Control SNMP Inter Client STAs Communication Filter Disable Administration A WDSISTP Settings Prevent intra VAP client communication Sotul e ie Prevent inter and intra VAP client communication e Status AP Management Filter Disable Enable Prevent AP management via wireless client 802 11a Interface e Radio Settings Uplink Port MAC Address Filtering e Security Disabi 802 11b q Interface e Radio Settings O Enable Edit Port MAC a Security Ethernet Type Filter Disable Enable Ox872d Oo OON Da3 oF OON 00806 OF OON Oxdlbad Gor OON 01000 ort Oo Inter Client STAs Communication Filter Sets the global mode for wireless to wireless communications between clients associated to Virtual AP VAP interfaces on the access point Default Prevent Inter and Intra VAP client Communication a Disabled All clients can communicate with each other through the access point CHAPTER 5 SYSTEM CONFIGURATION a Prevent Intra VAP client communication When enabled clients associated with a specific VAP interface cannot establish wireless communications with each other Clients can communicate with clients associated to other VAP interfaces a Prevent Inter and Intra VAP client communication When enabled clients cannot establish wireless communications with any other client either those associated to the same
71. R 6 COMMAND LINE INTERFACE Protocol Filter Information Local Bridge DISABLED AP Management ENABLED Ethernet Type Filter DISABLED Enabled Protocol Filters IP Address 3s 1924 254202051 Subnet Mask 21200 290 290 90 Default Gateway 192 254 0 1 Primary DNS 210 200 211 225 Secondary DNS t 210 200 277 193 Speed duplex 100Base TX Full Duplex Admin status Up Operational status Up Description 802 1la Access Point SSID AO Channel 0 AUTO Status Disable a al a 802 11 Parameters Transmit Power 100 5 dBm Data Rate 5S4Mbps Fragmentation Threshold 2346 bytes RTS Threshold 2347 bytes Beacon Interval 100 TUS DTIM Interval 1 beacon Maximum Association 64 stations Native VLAN ID EL 6 28 Using the Command Line Interface Sie Sa a a Security 5 555 555 5555 Closed System DISABLED Multicast cipher WEP Unicast cipher TKIP and AES WPA clients REQUIRED WPA Key Mgmt Mode PRE SHARED KEY WPA PSK Key Type ALPHANUMERIC Encryption DISABLED Default Transmit Key L Static Keys Key 1 EMPTY Key 2 EMPTY Key 3 EMPTY Key 4 EMPTY Key Length Key 1 ZERO Key 2 ZERO Key 3 ZERO Key 4 ZERO Authentication Type OPEN Rogue AP Detection Disabled Rogue AP Scan Interval 720 minutes Rogue AP Scan Duration 350 milliseconds Console Line Information databits 8 parity none speed 9600 stop bits E Logging Information Syslog State Dis
72. Requires WPA enabled system and network card driver native e support provided in Windows XP keys disabled Requires configured RADIUS server 802 1X EAP type may require management of digital certificates for clients and server Provides good security in small networks Requires manual management of pre shared key Provides the strongest security in WPA2 only mode Provides robust security in mixed mode for WPA and WPA2 clients Offers fast roaming for time sensitive client applications Requires configured RADIUS server 802 1X EAP type may require management of digital certificates for clients and server Clients may require hardware upgrade to be WPA2 compliant Provides robust security in small networks Requires manual management of pre shared key e Clients may require hardware upgrade to be WPA2 compliant NOTE You must enable data encryption through the web in order to enable all types of encryption WEP TKIP or AES in the access point The access point can simultaneously support clients using various different security mechanisms The configuration for these security combinations are outlined in the following table Note that MAC address authentication can be configured independently to work with all security mechanisms and is indicated separately in the table Required RADIUS server support is also listed Table 5 Security Considerations Client Security Configuration Summary MAC RADIUS Combination A
73. SSI controls allow the receive signal for each WDS port to be displayed CHAPTER 5 SYSTEM CONFIGURATION SYSTEM identification TCPHP Settings e RADIUS e Authentication e Filter Control SNMP Administration e WODS STP Settings e Sysiog Set up RSSI e Status 802 112 interface e Radio Settings e Security 802 1 1b g Interface Radio Settings e Security RSSI Figure 29 RSSI EEA 02 0 Erne Ambient Noise Floor 0dBm 0 dBm 802 11a Interface E E booo l 7 La i Distance 802 112 Interface a Noma Turbo bo kM 802 11g Interface pou Norma O Turbo 100 KM 802 11a Interface AP Traffic O Bridge RSSI 10203040506 802 119 Interface AP Traffic O Bridge RSSI 10203040506 a Auto Refresh Enables or disables the refreshing of RSSI information a RSSI Value The displayed RSSI value for a selected port a Port Number Selects a specific WDS port for which to display the RSSI output value Ports 1 6 are available for a Master unit only port 1 for a Slave unit Default 1 Distance a Mode Indicates if the radio interface is operating in normal or Turbo mode a Distance The approximate distance between antennas in a bridge link Radio Interface LED Status a Mode Selects AP mode or Bridge mode a Bridge Port Allows the user to select the bridge port for the LED display Default 1 Range 1 6 There are currently
74. STP information provided in the last configuration message becomes the designated port for the attached LAN If it is a root port a new root port is selected from among the device ports attached to the network Example Outdoor lla Building to Building config bridge stp max age 40 Outdoor lla Building to Building config bridge stp priority Use this command to configure the spanning tree priority globally for the wireless bridge Use the no form to restore the default Syntax bridge stp priority lt priority gt no bridge stp priority priority Priority of the bridge Range 0 65535 6 102 Using the Command Line Interface Default Setting 32768 Command Mode Global Configuration Command Usage Bridge priority is used in selecting the root device root port and designated port The device with the highest priority becomes the STP root device However if all devices have the same priority the device with the lowest MAC address will then become the root device Example Outdoor lla Building to Building config bridge stp bridge priority 40000 Outdoor lla Building to Building config bridge link path cost Use this command to configure the spanning tree path cost for the specified port Syntax bridge link path cost lt index gt lt cost gt e index Specifies the bridge link number on the wireless bridge Range 1 6 required on wireless interface only e cost The path cost for the port Range 1 65535
75. Syntax snmp server user lt user name gt user name A user defined string for the SNMP user 32 characters maximum Default Setting None Command Mode Global Configuration Command Usage e Up to 10 SNMPv3 users can be configured on the access point e The SNMP engine ID is used to compute the authentication privacy digests from the pass phrase You should therefore configure the engine ID with the snmp server engine id command before using this configuration command e The access point enables SNMP v3 users to be assigned to three pre defined groups Other groups cannot be defined The available groups are RO A read only group using no authentication and no data encryption Users in this group use no security either authentication or encryption in SNMP messages they send to the agent This is the same as SNMP v1 or SNMP v2c RWAuth A read write group using authentication but no data encryption Users in this group send SNMP messages that use an MD5 key password for authentication but not a DES key password for encryption RWPriv A read write group using authentication and data encryption Users in this group send SNMP messages that use an MD5 key password for authentication and a DES key password for encryption Both the MD5 and DES key passwords must be defined Using the Command Line Interface e The command prompts for the following information to configure an SNMP v3 user user name A user defined stri
76. TER 6 COMMAND LINE INTERFACE Table 19 802 1X Authentication Command Function Mode Page 802 1x Configures 802 1X as disabled supported or required IC W VAP 6 72 802 1x broadcast key Sets the interval at which the primary broadcast keys C W VAP 6 74 refresh rate are refreshed for stations using 802 1X dynamic keying 802 1x session key Sets the interval at which unicast session keys are C W VAP 6 75 refresh rate refreshed for associated stations using dynamic keying 802 1x session timeout Sets the timeout after which a connected client must be IC W VAP 6 75 re authenticated 802 1x supplicant enable Enables the access point to operate as a 802 1X GC 6 76 supplicant 802 1x supplicant user Sets the supplicant user name and password for the GC 6 76 access point show authentication Shows all 802 1X authentication settings as wellas the Exec 6 76 address filter table 802 1x This command configures 802 1X as optionally supported or as required for wireless clients Use the no form to disable 802 1X support Syntax 802 1x lt supported required gt no 802 1x e supported Authenticates clients that initiate the 802 1X authentication process Uses standard 802 11 authentication for all others e required Requires 802 1X authentication for all clients Default Setting Disabled Command Mode Global Configuration Command Usage e When 802 1X is disabled the access point does not support 802 1X authentication for any s
77. TY PMKSA Lifetime 720 minutes Encryption ENABLED Default Transmit Key 1 Common Static Keys Key EMPTY Key 2 EMPTY Key 3 EMPTY Key 4 EMPTY Pre Authentication DISABLED Authentication Type SHARED oes Sa es SE es i BD ig cL iE Ott eet 802 1x DISABLED Broadcast Key Refresh Rate 30 min Session Key Refresh Rate 30 min 802 1x Session Timeout Value O min bra aa a alas a aan a ANCOR ese Sa Antenna Control method Diversity Antenna ID 0x0000 Default Antenna Antenna Location Indoor SRS tSSe see sses Quality of Service WMM Mode SUPPORTED WMM Acknowledge Policy ACO Best Effort Acknowledge AC1 Background Acknowledge AC2 Video Acknowledge AC3 Voice Acknowledge WMM BSS Parameters ACO Best Effort logCwMin 4 logCwMax 10 AIFSN Admission Control No TXOP Limit 0 000 ms AC1 Background logCwMin 4 logCwMax 10 AIFSN Admission Control No TXOP Limit 0 000 ms AC2 Video logCwMin 3 logCwMax 4 AIFSN Admission Control No TXOP Limit 3 008 ms AC3 Voice logCwMin 2 logCwMax 3 AIFSN 6 131 Using the Command Line Interface Admission Control No TXOP Limit 1 504 ms CHAPTER 6 COMMAND LINE INTERFACE WMM AP Parameters ACO Best Effort logCwMin 4 logCwMax 6 AIFSN 3 Admission Control No TXOP Limit 0 000 ms AC1 Background logCwMin 4 logCwMax 10 AIFSN 7 Admission Control No TXOP Limit 0 000 ms AC2 Video logCwMin 3 logCwMax 4 AIFSN 1 Adm
78. VAP interface or any other VAP interface AP Management Filter Controls management access to the access point from wireless clients Management interfaces include the web Telnet or SNMP Default Disabled a Disabled Allows management access from wireless clients a Enabled Blocks management access from wireless clients Uplink Port MAC Address Filtering Status Prevents traffic with specified source MAC addresses from being forwarded to wireless clients through the access point You can add a maximum of eight MAC addresses to the filter table Default Disabled a MAC Address Specifies a MAC address to filter in the form XX XX XX XX XX XX a Permission Adds or deletes a MAC address from the filtering table Ethernet Type Filter Controls checks on the Ethernet type of all incoming and outgoing Ethernet packets against the protocol filtering table Default Disabled a Disabled Access point does not filter Ethernet protocol types a Enabled Access point filters Ethernet protocol types based on the configuration of protocol types in the filter table If the status of a protocol is set to ON the protocol is filtered from the access point NOTE Ethernet protocol types not listed in the filtering table are always forwarded by the access point Filter Control VLAN The access point can employ VLAN tagging support to control access to network resources and increase security VLANs separate traffic passing be
79. VLAN 5 17 SNMP 5 19 Configuring SNMP and Trap Message Parameters 5 19 Configuring SNMPv3 Users 5 22 Administration 5 23 Changing the Password 5 23 Telnet and SSH Settings 5 24 Upgrading Firmware 5 25 WDS and Spanning Tree Settings 5 28 System Log 5 33 Enabling System Logging 5 33 Configuring SNTP_ 5 34 RSSI 5 35 Radio Interface 5 37 802 11a Interface 5 38 Configuring Radio Settings 5 38 Configuring Common Radio Settings 5 39 802 11b g Interface 5 43 Configuring Wi Fi Multimedia 5 45 Security 5 50 Wired Equivalent Privacy WEP 5 53 Wi Fi Protected Access WPA 5 57 Command Line Interface Using the Command Line Interface 6 1 Accessing the CLI 6 1 Console Connection 6 1 Telnet Connection 6 2 Entering Commands 6 3 Keywords and Arguments 6 3 Minimum Abbreviation 6 3 Command Completion 6 3 Getting Help on Commands 6 3 Showing Commands 6 4 Partial Keyword Lookup 6 4 Negating the Effect of Commands 6 5 Using Command History 6 5 Understanding Command Modes 6 5 Exec Commands 6 5 Configuration Commands 6 6 Command Line Processing 6 6 Command Groups 6 7 Troubleshooting Cables and Pinouts Twisted Pair Cable Assignments B 1 10 100BASE TX Pin Assignments B 2 Straight Through Wiring B 3 Crossover Wiring B 4 8 Pin DIN Connector Pinout B 5 8 Pin DIN to RJ 45 Cable Wiring B 6 Glossary Index vi TERMINOLOGY Access Point An internet working device that seamlessly connects wired and wireless network
80. a backup in case the primary server fails The access point uses the secondary server if the primary server fails or becomes inaccessible Once the access point switches over to the secondary server it periodically attempts to establish communication again with primary server If communication with the primary server is re established the secondary server reverts to a backup role VLAN ID Format A VLAN ID a number between 1 and 4094 can be assigned to each client after successful authentication using IEEE 802 1X and a central RADIUS server The user VLAN IDs must be configured on the RADIUS server for each user authorized to access the network VLAN IDs can be entered as hexadecimal numbers or as ASCII strings AUTHENTICATION Wireless clients can be authenticated for network access by checking their MAC address against the local database configured on the access point or by using a database configured on a central RADIUS server Alternatively authentication can be implemented using the IEEE 802 1X network access control protocol A client s MAC address provides relatively weak user authentication since MAC addresses can be easily captured and used by another station to break into the network Using 802 1X provides more robust user authentication using user names and passwords or digital certificates You can configure the access point to use both MAC address and 802 1X authentication with client station MAC authentication occurring prio
81. a multi vendor environment Example Outdoor lla Building to Building config iapp Outdoor lla Building to Building config VLAN Commands The access point can enable the support of VLAN tagged traffic passing between wireless clients and the wired network Up to 64 VLAN IDs can be mapped to specific wireless clients allowing users to remain within the same VLAN as they move around a campus site When VLAN is enabled on the access point a VLAN ID a number between 1 and 4094 can be assigned to each client after successful authentication using IEEE 802 1X and a central RADIUS server The user VLAN IDs must be configured on the RADIUS server for each user authorized to access the network If a user does not have a configured VLAN ID the access point assigns the user to its own configured native VLAN ID 6 154 Using the Command Line Interface NOTE When VLANs are enabled the access point s Ethernet port drops all received traffic that does not include a VLAN tag To maintain network connectivity to the access point and wireless clients be sure that the access point is connected to a device port on a wired network that supports IEEE 802 1Q VLAN tags The VLAN commands supported by the access point are listed below Table 29 VLAN Commands Command Function Mode Page vlan Enables a single VLAN for all traffic GC 6 156 management Configures the management VLAN for the access point GC 6 156 vianid vlan id Configures the defa
82. able server This command enables SNMP management access and also enables this device to send SNMP traps i e notifications Use the no form to disable SNMP service and trap messages Syntax snmp server enable server no snmp server enable server Default Setting Enabled Command Mode Global Configuration Command Usage e This command enables both authentication failure notifications and link up down notifications e The snmp server host command specifies the host device that will receive SNMP notifications Example Outdoor lla Building to Building config snmp server enable server Outdoor lla Building to Building config Related Commands snmp server host 6 48 snmp server host This command specifies the recipient of an SNMP notification Use the no form to remove the specified host Syntax snmp server host lt 1 2 3 4 gt lt host_ip_address host_name gt lt community string gt no snmp server host e 1 First SNMP host e 2 Second SNMP host e 3 Third SNMP host e 4 Fourth SNMP host e host_ip_address IP of the host the targeted recipient 6 48 Using the Command Line Interface e host_name Name of the host Range 1 63 characters community string Password like community string sent with the notification operation Although you can set this string using the snmp server host command by itself we recommend that you define this string using the snmp server community command
83. abled Logging Console State Disabled Logging Level Informational Logging Facility Type 16 Servers MEER S EA S OS UDP Port 514 State Disabled 2 0 0 0 0 UDP Port 514 State Disabled 3 0 020 0 UDP Port 514 State Disabled 4 0 0 0 0 UDP Port 514 State Disabled Radius Server Information IP 0 0 0 0 Port 1812 Key Kk KKK Retransmit 3 Timeout 5 Radius MAC format no delimiter Radius VLAN format HEX 6 29 CHAPTER 6 COMMAND LINE INTERFACE Radius Secondary Server Information IP 0 50 0 20 Port 1812 Key Kk KKK Retransmit 3 Timeout 5 Radius MAC format no delimiter Radius VLAN format HEX SNMP Information Service State Disable Community ro KEREN Community rw K kk k k k k k Location Contact Contact EngineId 180200107165 80 00 00429 f6 00 00 00 0G EngineBoots 2 Trap Destinations ds 0 0 0 0 Community State Disabled 22 0 0 0 0 Community State Disabled 33 0 0 0 0 Community State Disabled 4 0 0 0 0 Community State Disabled dotlliInterfaceAGFail Enabled dotlliInterfaceBFail Enabled dot1ll1iStationAssociation Enabled dot11StationAuthentication Ena dot11StationReAssociation Enabled dot11StationRequestFail Ena dotixAuthFail Enabled dotixAuthNotInitiated Ena dotixAuthSuccess Enabled dot1lxMacAddrAuthFail Ena dotixMacAddrAuthSuccess Enabled iappContextDataSent Ena iappStationRoamedFrom Enabled iappStationRoamedTo Ena localMacAddrAuthFail Enabled localMacAddrAuthSuccess Ena pppL
84. access point with an IP address you can open a Telnet session by performing these steps 1 From the remote host enter the Telnet command and the IP address of the device you want to access 2 Atthe prompt enter the user name and system password The CLI will display the Outdoor 11a Building to Building prompt to show that you are using executive access mode i e Exec 3 Enter the necessary commands to complete your desired tasks 4 When finished exit the session with the quit or exit command After entering the Telnet command the login screen displays Username admin Password Outdoor lla Building to Building i NOTE You can open up to four sessions to the device via Telnet 6 2 Using the Command Line Interface ENTERING COMMANDS This section describes how to enter CLI commands Keywords and Arguments A CLI command is a series of keywords and arguments Keywords identify a command and arguments specify configuration parameters For example in the command show interfaces ethernet show and interfaces are keywords and ethernet is an argument that specifies the interface type You can enter commands as follows e To enter a simple command enter the command keyword e To enter commands that require parameters enter the required parameters after the command keyword For example to set a password for the administrator enter Outdoor lla Building to Building config username s
85. acters for 152 bit keys 802 11a radio only a Key Selects the key number to use for encryption for each VAP interface If the clients have all four keys configured to the same values you can change the encryption key to any of the four settings without having to update the client keys Default Key 1 Figure 37 WEP Keys Client Types C WEP amp WPA clients both WEP and TKIP are supported C WPA clients only all clients must support TKIP cipher WEP clients only all clients must use WEP cipher WEP Configuration The WEP Key settings below will apply to all virtual AP 1 4 Key Size 64 Bit C 128 Bit 152 Bit Key Type Hexadecimal Enter 10 26 or 32 hex digits C Alphanumeric Enter 5 13 or 16 characters Renmei rewnee c eee c al Cc a Client Types Specifies the type of client to encrypt a WEP and WPA clients Both WEP and TKIP encryption are supported a WPA clients only All clients must support TKIP a WEP clients only All clients must support WEP WEP Configuration Under open authentication it is still possible to configure WEP keys a Key Size 64 Bit 128 Bit or 152 Bit key length Note that the same size of encryption key must be supported on all wireless clients Default None 5 56 Security a Key Type Select the preferred method of entering WEP encryption keys on the access point and enter up to four keys e Hexadecimal Enter keys as 10 hexadecimal di
86. address gt e index The link index number of the child node Range 1 6 e mac address The wireless MAC address of a child bridge unit 12 hexadecimal digits in the form XX XX XX XX XX XXx CHAPTER 6 COMMAND LINE INTERFACE Default Setting None Command Mode Interface Configuration Wireless Command Usage e In root bridge mode up to six child bridge links can be specified using link index numbers 1 to 6 e In bridge mode up to five child links can be specified using link index numbers 2 to 6 Index number 1 is reserved for the parent link which must be set using the bridge parent command Example Outdoor lla Building to 00 08 3e 84 bc 6da Outdoor lla Building to 00 08 3e 85 13 f 2 Outdoor lla Building to 00 08 3e 84 79 31 Outdoor lla Building to Building if wireless Building if wireless Building if wireless Building if wireless bridge dynamic entry age time This command sets the time for aging out dynamic entries in the WDS forwarding table Syntax a bridge link child 2 a bridge link child 3 a bridge link child 4 a bridge dynamic entry age time lt seconds gt seconds The time to age out an address entry Range 10 10000 seconds 6 92 Using the Command Line Interface Default Setting 300 seconds Command Mode Global Configuration Command Usage If the MAC address of an entry in the address table is not seen on the associated interface for l
87. alse unexpected return Notice Normal but significant condition such as cold start Informational Informational messages only Debug Debugging messages NOTE The access point error log can be viewed using the Event Logs window in the Status section page 5 62 The Event Logs window displays the last 128 messages logged in chronological order from the newest to the oldest Log messages saved in the access point s memory are erased when the device is rebooted CONFIGURING SNTP Simple Network Time Protocol SNTP allows the access point to set its internal clock based on periodic updates from a time server SNTP or NTP Maintaining an accurate time on the access point enables the system log to record meaningful dates and times for event entries If the clock is not set the access point will only record the time from the factory default set at the last bootup 5 34 RSSI RSSI The access point acts as an SNTP client periodically sending time synchronization requests to specific time servers You can configure up to two time server IP addresses The access point will attempt to poll each server in the configured sequence SNTP Server Configures the access point to operate as an SNTP client When enabled at least one time server IP address must be specified a Primary Server The IP address of an SNTP or NTP time server that the access point attempts to poll for a time update Secondary Server The IP address of a seconda
88. ange of IP addresses allowed management access Default Setting All addresses Command Mode Global Configuration Command Usage If anyone tries to access a management interface on the access point from an invalid address the unit will reject the connection enter an event message in the system log and send a trap message to the trap manager IP address can be configured for SNMP web and Telnet access respectively Each of these groups can include up to five different sets of addresses either individual addresses or address ranges When entering addresses for the same group i e SNMP web or Telnet the access point will not accept overlapping address ranges When entering addresses for different groups the access point will accept overlapping address ranges You cannot delete an individual address from a specified range You must delete the entire range and reenter the addresses You can delete an address range just by specifying the start address or by specifying both the start address and end address CHAPTER 6 COMMAND LINE INTERFACE Example This example restricts management access to the indicated addresses Outdoor lla Building to Building config apmgmtip multiple 192 254 1 50 255 255 255 0 Outdoor lla Building to Building config APmgmtUI This command enables and disables management access to the access point through SNMP Telnet and web interfaces NOTE Secure Web HTTPS connections are not affected by th
89. annels are available e Both the 802 11g and 802 11b standards operate within the 2 4 GHz band If you are operating in g mode any 802 11b devices in the service area will contribute to the radio frequency noise and affect network performance Example Outdoor lla Building to Building if wireless g radio mode g Outdoor lla Building to Building if wireless g preamble This command sets the length of the signal preamble that is used at the start of a 802 11b g data transmission Syntax preamble long short or long e long Sets the preamble to long 192 microseconds e short or long Sets the preamble to short if no 802 11b clients are detected 96 microseconds Default Setting Short or Long Command Mode Interface Configuration Wireless 802 11b g Command Usage e Using a short preamble instead of a long preamble can increase data throughput on the access point but requires that all clients can support a short preamble e Set the preamble to long to ensure the access point can support all 802 11b and 802 1 1g clients 6 118 Using the Command Line Interface Example Outdoor lla Building to Building if wireless g preamble short Outdoor lla Building to Building if wireless g antenna control This command selects the use of two diversity antennas or a single antenna for the radio interface Syntax antenna control lt diversity left right gt e diversity The radio uses both antennas in a diver
90. at are stored in memory Example Outdoor lla Building to Building config logging on Outdoor lla Building to Building config logging host This command specifies syslog servers host that will receive logging messages Use the no form to remove syslog server host Syntax logging host lt 1 2 3 4 gt lt host_name host_ip_address gt udp_port no logging host lt 1 2 3 4 gt e 1 First syslog server e 2 Second syslog server e 3 Third syslog server e 4 Fourth syslog server e host_name The name of a syslog server Range 1 20 characters e host_ijp_address The IP address of a syslog server e udp_port The UDP port used by the syslog server CHAPTER 6 COMMAND LINE INTERFACE Default Setting None Command Mode Global Configuration Example Outdoor lla Building to Building config logging host 1 10 1 0 3 Outdoor lla Building to Building config logging console This command initiates logging of error messages to the console Use the no form to disable logging to the console Syntax no logging console Default Setting Disabled Command Mode Global Configuration Example Outdoor lla Building to Building config logging console Outdoor lla Building to Building config logging level This command sets the minimum severity level for event logging Syntax logging level lt Emergency Alert Critical Error Warning Notice Informational Debug gt Default Sett
91. autonegotiate speed and duplex mode e 10MH Forces 10 Mbps half duplex operation e 10MF Forces 10 Mbps full duplex operation e 100MH Forces 100 Mbps half duplex operation 100MF Forces 100 Mbps full duplex operation Default Setting Auto negotiation is enabled by default Command Mode Interface Configuration Ethernet Command Usage If autonegotiation is disabled the speed and duplex mode must be configured to match the setting of the attached device Example The following example configures the Ethernet port to 100 Mbps full duplex operation Outdoor lla Building to Building if ethernet speed duplex 100mf Outdoor lla Building to Building if ethernet shutdown This command disables the Ethernet interface To restart a disabled interface use the no form Syntax no shutdown Default Setting Interface enabled Command Mode Interface Configuration Ethernet 6 109 CHAPTER 6 COMMAND LINE INTERFACE Command Usage This command allows you to disable the Ethernet port due to abnormal behavior e g excessive collisions and reenable it after the problem has been resolved You may also want to disable the Ethernet port for security reasons Example The following example disables the Ethernet port Outdoor lla Building to Building if ethernet shutdown Outdoor lla Building to Building if ethernet show interface ethernet This command displays the status for the Ethernet interface Syn
92. aximum throughput ranges between 40 to 60 Mbps for connections to Atheros compatible clients 6 124 Using the Command Line Interface Example Outdoor lla Building to Building if wireless a super a Outdoor lla Building to Building if wireless a super g This command enables Atheros proprietary Super G performance enhancements Use the no form to disable this function Syntax no super g Default Setting Disabled Command Mode Interface Configuration Wireless 802 119 Command Usage These enhancements include bursting compression fast frames and dynamic turbo Maximum throughput ranges between 40 to 60 Mbps for connections to Atheros compatible clients Example Outdoor lla Building to Building if wireless a super g Outdoor lla Building to Building if wireless a description This command adds a description to a the wireless interface Use the no form to remove the description Syntax description lt string gt no description string Comment or a description for this interface Range 1 80 characters Default Setting None Command Mode Interface Configuration Wireless VAP 6 125 CHAPTER 6 COMMAND LINE INTERFACE Example Outdoor lla Building to Building if wireless g VAP 0 description RD AP 3 Outdoor lla Building to Building if wireless g VAP 0 ssid This command configures the service set identifier SSID Syntax ssid lt string gt string The name of a basic service se
93. ays the transmission of broadcast multicast frames Example Outdoor lla Building to Building if wireless g dtim period 100 Outdoor lla Building to Building if wireless g 6 122 Using the Command Line Interface fragmentation length This command configures the minimum packet size that can be fragmented when passing through the access point Syntax fragmentation length lt ength gt length Minimum packet size for which fragmentation is allowed Range 256 2346 bytes Default Setting 2346 Command Mode Interface Configuration Wireless Command Usage e f the packet size is smaller than the preset Fragment size the packet will not be segmented e Fragmentation of the PDUs Package Data Unit can increase the reliability of transmissions because it increases the probability of a successful transmission due to smaller frame size If there is significant interference present or collisions due to high network utilization try setting the fragment size to send smaller fragments This will soeed up the retransmission of smaller frames However it is more efficient to set the fragment size larger if very little or no interference is present because it requires overhead to send multiple frames Example Outdoor lla Building to Building if wireless g fragmentation length 512 Outdoor 1la Building to Building if wireless g rts threshold This command sets the packet size threshold at which a Request to Send RTS sig
94. basic system and the ess interface Shows the wireless clients currently associated with the access poin Shows log messages stored in memory Con Con fore igures the IEEE 802 11a interface igures common radio signal parameters and other settings ach VAP interface Enables each virtual access point VAP interface sets the Service Set Identifier SSID and configures wireless security Configures the IEEE 802 11g interface Configures common radio signal parameters and other settings fore ach VAP interface Enables each VAP interface sets the SSID and configures wireless secu rity 5 3 Page 5 19 5 23 5 28 5 33 5 35 5 60 5 60 5 61 5 62 5 37 5 38 5 50 5 37 5 43 5 50 CHAPTER 5 SYSTEM CONFIGURATION SYSTEM IDENTIFICATION The system name for the access point can be left at its default setting However modifying this parameter can help you to more easily distinguish different devices in your network Figure 12 System Identification Identification System Name Enterprise WirelessAP TCPAP Settin e TCPA gs name is designed for the user to uniquely identify this device The changes to the system RADI The e WS name will not be shown on the title bar until you close your browser and log back into the AP Authentication Filter Control e SNMP Administration 802 1 1b g interface ZZ Ma aA Radio Settings A j e Security System Name
95. ble all filtering based on the filtering table Example Outdoor lla Building to Building config filter ethernet type protocol ARP Outdoor lla Building to Building config Related Commands filter ethernet type enable 6 86 show filters This command shows the filter options and protocol entries in the filter table Command Mode Exec CHAPTER 6 COMMAND LINE INTERFACE Example Outdoor lla Building to Building show filters Protocol Filter Information Local Bridge AP Management 00 12 34 56 78 9a Ethernet Type Filter UPlink Access Table Traffic among all client STAs blocked ENABLED DISABLED UPlink access control Enabled UPlink MAC access control list Outdoor lla Building to Building WDS Bridge Commands The commands described in this section are used to set the operation mode for each access point interface and configure Wlreless Distribution System WDS forwarding table settings Table 22 WDS Bridge Commands Command Function Mode Page bridge mode Selects Master or Slave mode IC W 6 89 bridge role Selects the bridge operation mode for a radio interface IC W 6 89 bridge channel auto sync Automatically finds the parent bridge operating IC W 6 90 channe A bridge link parent bridge link child bridge dynamic entry age time show bridge aging time show bridge filter entry show bridge link CAUTION Do not enable Channel Auto Sync on a master bridge if there is no root b
96. both WEP and TKIP are supported O WPA Clients only ell clients must support TKIP cipher WEP clients ony al cients must use WEP cipher Authentication Sets the access point to communicate as an open system that accepts network access attempts from any client or with clients using pre configured static shared keys Default Open System Open System If you don t set up any other security mechanism on the access point the network has no protection and is open to all users This is the default setting a Shared Key Sets the access point to use WEP shared keys If this option is selected you must configure at least one key on the access point and all clients NOTE To use 802 1X on wireless clients requires a network card driver and 802 1X client software that supports the EAP authentication type that you want to use Windows 2000 SP3 or later and Windows XP provide 802 1X client support Windows XP also provides native WPA support Other systems require additional client software to support 802 1X and WPA 5 54 Security Encryption Enable or disable the access point to use data encryption WEP TKIP or AES If this option is selected when using static WEP keys you must configure at least one key on the access point and all clients Default Disabled NOTE You must enable data encryption through the web or CLI in order to enable all types of encryption WEP TKIP or AES in the access point Cipher Modes Se
97. both antennas must be set to the same polarization direction Ideally the antennas should be pointing upwards mounted on the top part of a pole Pieeueeturetaeeeg p a 2 6 RADIO INTERFERENCE The avoidance of radio interference is an important part of wireless link planning Interference is caused by other radio transmissions using the same or an adjacent channel frequency You should first scan your proposed site using a spectrum analyzer to determine if there are any strong radio signals using the 802 11a channel frequencies Always use a channel frequency that is furthest away from another signal If radio interference is still a problem with your wireless bridge link changing the antenna polarization direction may improve the situation NOTE For US operation of 5 GHz WDS links avoid possible radio link disruption from radar by selecting the following recommended RF channels Normal mode 49 153 157 161 165 Turbo mode 42 152 160 WEATHER CONDITIONS When planning wireless bridge links you must take into account any extreme weather conditions that are known to affect your location Consider these factors e Temperature The wireless bridge is tested for normal operation in temperatures from 40 C to 60 C Operating in temperatures outside of this range may cause the unit to fail Wind Velocity The wireless bridge can operate in winds up to 100 MPH and survive higher wind speeds up to 150 MP
98. cation Working together these protocols provide mutual authentication between a client the access point and a RADIUS server that prevents users from accidentally joining a rogue network Only when a RADIUS server has authenticated a user s credentials will encryption keys be sent to the access point and client NOTE To implement WPA on wireless clients requires a WPA enabled network card driver and 802 1X client software that supports the EAP authentication type that you want to use Windows XP provides native WPA support other systems require additional software CHAPTER 5 SYSTEM CONFIGURATION Temporal Key Integrity Protocol TKIP WPA specifies TKIP as the data encryption method to replace WEP TKIP avoids the problems of WEP static keys by dynamically changing data encryption keys Basically TKIP starts with a master temporal key for each user session and then mathematically generates other keys to encrypt each data packet TKIP provides further data encryption enhancements by including a message integrity check for each packet and a re keying mechanism which periodically changes the master key WPA Pre Shared Key Mode WPA PSK WPA2 PSK For enterprise deployment WPA requires a RADIUS authentication server to be configured on the wired network However for small office networks that may not have the resources to configure and maintain a RADIUS server WPA provides a simple operating mode that uses just a pre shared passwor
99. ce IC E 6 109 show interface ethernet Shows the status for the Ethernet interface Exec 6 110 6 105 CHAPTER 6 COMMAND LINE INTERFACE interface ethernet This command enters Ethernet interface configuration mode Default Setting None Command Mode Global Configuration Example To specify the 10 100Base TX network interface enter the following command Outdoor lla Building to Building config interface ethernet Outdoor lla Building to Building if ethernet dns server This command specifies the address for the primary or secondary domain name server to be used for name to address resolution Syntax dns primary server lt server address gt dns secondary server lt server address gt e primary server Primary server used for name resolution e secondary server Secondary server used for name resolution e server adadress IP address of domain name server Default Setting None Command Mode Global Configuration Command Usage The primary and secondary name servers are queried in sequence Example This example specifies two domain name servers Outdoor lla Building to Building if ethernet dns primary server 192 254 2 55 Outdoor lla Building to Building if ethernet dns secondary server 1021 10 55 Outdoor lla Building to Building if ethernet 6 106 Using the Command Line Interface Related Commands show interface ethernet 6 110 ip address This command sets the IP address for the access point Use
100. ch scans occur Frequent scanning will more readily detect other access points but will cause more disruption to client access Example Outdoor lla Building to Building if wireless g rogue ap interval 120 Outdoor 1la Building to Building if wireless g Related Commands rogue ap duration 6 136 rogue ap scan This command starts an immediate scan for access points on the radio interface 6 137 CHAPTER 6 COMMAND LINE INTERFACE Default Setting Disabled Command Mode Interface Configuration Wireless Command Usage While the access point scans a channel for rogue APs wireless clients will not be able to connect to the access point Therefore avoid frequent scanning or scans of a long duration unless there is a reason to believe that more intensive scanning is required to find a rogue AP Example Outdoor lla Building to Building if wireless g rogue ap scan Outdoor lla Building to Building if wireless g rogueApDetect Completed Radio G 9 APs detected rogueAPDetect Radio G refreshing ap database now Outdoor 1la Building to Building if wireless g 6 138 Using the Command Line Interface show rogue ap This command displays the current rogue AP database Command Mode Exec Example Outdoor lla Building to Building show rogue ap 802 1la Channel Rogue AP Status AP Address BSSID SSID Channel MHz RSSI Type Privacy RSN 802 11g Channel Rogue AP Status AP Address BSSID SSID Channel MHz
101. ciation and keys are deleted from the cache If the client returns to the access point it requires full reauthentication e The access point can store up to 256 entries in the PMKSA cache 6 148 Using the Command Line Interface Example Outdoor lla Building to Building if wireless g VAP 0 wpa pre shared key ASCII agoodsecret Outdoor lla Building to Building if wireless g VAP 0 pre authentication This command enables WPA2 pre authentication for fast secure roaming Syntax pre authentication lt enable disable gt e enable Enables pre authentication for the VAP interface e disable Disables pre authentication for the VAP interface Default Setting Disabled Command Mode Interface Configuration Wireless VAP Command Usage e Each time a client roams to another access point it has to be fully re authenticated This authentication process is time consuming and can disrupt applications running over the network WPA2 includes a mechanism known as pre authentication that allows clients to roam to a new access point and be quickly associated The first time a client is authenticated to a wireless network it has to be fully authenticated When the client is about to roam to another access point in the network the access point sends pre authentication messages to the new access point that include the client s security association information Then when the client sends an association request to the new access point th
102. configured to periodically scan all radio channels and find other access points within range A database of nearby access points is maintained where any rogue APs can be identified Table 26 Rogue AP Commands Command Function Mode Page rogue ap enable Enables the periodic detection of other nearby access GC 6 134 points rogue ap authenticate Enables identification of all access points GC 6 135 rogue ap duration Sets the duration that all channels are scanned GC 6 136 rogue ap interval Sets the time between each scan GC 6 136 rogue ap scan Forces an immediate scan of all radio channels GC 6 137 show rogue ap Shows the current database of detected access points Exec 6 139 rogue ap enable This command enables the periodic detection of nearby access points Use the no form to disable periodic detection Syntax no rogue ap enable Default Setting Disabled Command Mode Interface Configuration Wireless Command Usage e While the access point scans a channel for rogue APs wireless clients will not be able to connect to the access point Therefore avoid frequent scanning or scans of a long duration unless there is a reason to believe that more intensive scanning is required to find a rogue AP e A rogue AP is either an access point that is not authorized to participate in the wireless network or an access point that does not have the correct security configuration Rogue access points can be identified by unknown BSSID MAC addres
103. connection Be sure you have set the terminal emulator program to VT100 compatible 8 data bits 1 stop bit no parity and 9600 bps Check that the serial cable conforms to the pin out connections provided on page B 3 If you forgot or lost the password a Contact your local Technical Support for help If all other recovery measure fail and the bridge is still not functioning properly take any of these steps A 2 a Reset the bridge s hardware using the console interface web interface or through a power reset A 3 TWISTED PAIR CABLE ASSIGNMENTS For 10 100BASE TX connections a twisted pair cable must have two pairs of wires Each wire pair is identified by two different colors For example one wire might be green and the other green with white stripes Also an RJ 45 connector must be attached to both ends of the cable CAUTION Each wire pair must be attached to the RJ 45 connectors in a specific orientation Use only twisted pair cables with RJ 45 connectors that conform with FCC CAUTION DO NOT plug a phone jack connector into a power injector RJ 45 port standards The following figure illustrates how the pins on the RJ 45 connector are numbered Be sure to hold the connectors in the same orientation when attaching the wires to the pins B 1 10 100BASE TX PIN ASSIGNMENTS Use unshielded twisted pair UTP or shielded twisted pair STP cable for RJ 45 connections 100 ohm Category 3 or bette
104. cription Page System Configures basic administrative and client access 5 4 Identification Specifies the host name 5 4 TCP IP Settings Configures the IP address subnet mask gateway and domain 5 5 name servers RADIUS Configures the RADIUS server for wireless client authentication 5 8 and accounting Authentication Configures 802 1X client authentication with an option for MAC 5 10 address authentication Filter Control Filters communications between wireless clients access to the 5 15 management interface from wireless clients and traffic matching specific Ethernet protocol types 5 2 Menu SNMP Administration WDS STP Settings Syslog Set up RSSI Status AP Status Station Status Event Logs 802 1 1a Interface Radio Settings Security 802 1 1b g Interface Radio Settings Security Advanced Setup Description Con Con upgr confi poin Con Con igures SNMP settings igures user name and password for management access ades software from local file FTP or TFTP server resets guration settings to factory defaults and resets the access igures WDS bridging and Spanning Tree Protocol features rols logging of error messages sets the system clock via SNTP server or manual configuration Con mod Disp Disp wire igures RSSI value display bridge link distance and LED display e ays information about the access point and wireless clients ays configuration settings for the
105. cryption Enabled Authentication Setup WPA PSK WPA2 PSK or Authentication Setup WPA WPA2 WPA WPA2 mixed WPA WPA2 mixed Cipher Suite WEP TKIP AES CCMP Cipher Suite WEP TKIP AES CCMP WPA Pre shared Key Type Hex ASCIl requires RADIUS server to be specified 1 You must enable data encryption in order to enable all types of encryption in the access point 2 Select TKIP when any WPA clients do not support AES Select AES only if all clients support AES CHAPTER 5 SYSTEM CONFIGURATION Status Information The Status page includes information on the following items Access Point Status The AP Status window displays basic system configuration settings as well as the settings for the wireless interface Figure 38 AP Status h AP Status E AP Status Stations Status EventLogs Advanced Setup AP System Configuration 0 days 23 hours 20 minutes 19 seconds 00 03 7F FE 03 01 Enterprise Wireless AP UNITED STATES Contact 192 168 1 1 192 168 1 254 1 80 v2 04 AP Wireless Configuration Radio Interface 1 802 11a 1 DISABLED 3Com1 36 DISABLED OPEN BOTH 0 937ffe 2 DISABLED 3Com2 36 DISABLED OPEN BOTH 03 7ife 3 DISABLED 3Com3 36 DISABLED OPEN BOTH 03 7ife 4 DISABLED 3Com4 36 DISABLED OPEN BOTH 0 937ffe AP System Configuration The AP System Configuration table displays the basic system configuration settings a System Up Time Length of time the management agent has been up a M
106. d for network access The Pre Shared Key mode uses a common password for user authentication that is manually entered on the access point and all wireless clients The PSK mode uses the same TKIP packet encryption and key management as WPA in the enterprise providing a robust and manageable alternative for small networks Mixed WPA and WEP Client Support WPA enables the access point to indicate its supported encryption and authentication mechanisms to clients using its beacon signal WPA compatible clients can likewise respond to indicate their WPA support This enables the access point to determine which clients are using WPA security and which are using legacy WEP The access point uses TKIP unicast data encryption keys for WPA clients and WEP unicast keys for WEP clients The global encryption key for multicast and broadcast traffic must be the same for all clients therefore it restricts encryption to a WEP key When access is opened to both WPA and WEP clients no authentication is provided for the WEP clients through shared keys To support authentication for WEP clients in this mixed mode configuration you can use either MAC authentication or 802 1X authentication WPA2 WPA was introduced as an interim solution for the vulnerability of WEP pending the ratification of the IEEE 802 11i wireless security standard In effect the WPA security features are a subset of the 802 111 standard WPA2 includes the now ratified 802 111 standard but
107. dary 0 0 0 0 Command Mode Global Configuration Example Outdoor lla Building to Building config dhcp relay primary 192 254 2 10 Outdoor lla Building to Building config show dhcp relay This command displays the current DHCP relay configuration 6 43 CHAPTER 6 COMMAND LINE INTERFACE Command Mode Exec Example Outdoor lla Building to Building show dhcp relay DHCP Relay ENABLED Primary DHCP Server gt 192 254 2 10 Secondary DHCP Server 0 0 0 0 Outdoor lla Building to Building SNMP Commands Controls access to this access point from management stations using the Simple Network Management Protocol SNMP as well as the hosts that will receive trap messages Table 16 SNMP Commands Command Function Mode Page snmp server community Sets up the community access string to permit access GC 6 46 to SNMP commands snmp server contact Sets the system contact string GC 6 46 snmp server location Sets the system location string GC 6 47 snmp server enable server Enables SNMP service and traps GC 6 48 snmp server host Specifies the recipient of an SNMP notification GC 6 48 operation snmp server trap Enables specific SNMP notifications GC 6 49 snmp server engine id Sets the engine ID for SNMP v3 GC 6 51 snmp server user Sets the name of the SNMP v3 user GC 6 52 snmp server targets Configures SNMP v3 notification targets GC 6 53 snmp server filter Configures SNMP v3 notification filters GC 6 54 snmp server Assigns SNMP
108. de network access to wireless clients The Setup Wizard takes you through configuration procedures for the wireless Service Set Identifier the radio channel selection IP configuration and basic authentication for wireless clients The access point can be managed by any computer using a web browser such as Internet Explorer 5 0 or above Enter the default IP address http 169 254 2 1 4 4 Using the Setup Wizard NOTE If you changed the default IP address via the command line interface above use that address instead of the one shown here Logging In Enter the username admin and password password then click LOGIN For information on configuring a user name and password see page 23 Figure 3 Login Page CA CA Username Password The default usemame is admin with password password Copyright 2006 3Com Corporation All rights reserved 4 5 CHAPTER 4 INITIAL CONFIGURATION The home page displays the Main Menu Figure 4 Home Page Can 3com Advanced Setup Setup Wizard Launching the Setup Wizard To perform initial configuration click Setup Wizard on the home page select the VAP you wish to configure then click on the Next button to start the process Figure 5 Setup Wizard Start Setup Wizard yned for you to quickly configure this device Please follow the access points to form different Virtual Access Point VAP urity parameters You can configure u
109. did not initiate 802 1X authentication dot1xAuthSuccess A 802 1X client station has been successfully authenticated by the RADIUS server dot1xMacAddrAuthFail A client station has failed MAC address authentication with the RADIUS server dot1xMacAddrAuthSuccess A client station has successfully authenticated its MAC address with the RADIUS server iappContextDataSent A client station s Context Data has been sent to another access point with which the station has associated iappStationRoamedFrom A client station has roamed from another access point identified by its IP address iappStationRoamedTo A client station has roamed to another access point identified by its IP address localMacAddrAuthFail A client station has failed authentication with the local MAC address database on the access point localMacAddrAuthSuccess A client station has successfully authenticated its MAC address with the local database on the access point pppLogonFail The access point has failed to log onto the PPPoE server using the configured user name and password sntpServerFail The access point has failed to set the time from the configured SNTP server sysConfigFileVersionChanged The access point s configuration file has been changed sysRadiusServerChanged The access point has changed from the primary RADIUS server to the secondary or from the secondary to the primary sysSystemDown The access point is about to shutdown and
110. dio interface Station Status The Station Status window shows the wireless clients currently associated with the access point Figure 39 Station Status h Fome K AP Status ti Station Status a Station Configuration Event Logs Advanced Setup i 802 11a 802 11g The Station Configuration page displays basic connection information for all associated stations as described below Note that this page is automatically refreshed every five seconds a Station Address The MAC address of the wireless client a Authenticated Shows if the station has been authenticated The two basic methods of authentication supported for 802 11 wireless networks are open 5 61 CHAPTER 5 SYSTEM CONFIGURATION system and shared key Open system authentication accepts any client attempting to connect to the access point without verifying its identity The shared key approach uses Wired Equivalent Privacy WEP to verify client identity by distributing a shared key to stations before attempting authentication a Associated Shows if the station has been successfully associated with the access point Once authentication is completed stations can associate with the current access point or reassociate with a new access point The association procedure allows the wireless system to track the location of each mobile client and ensure that frames destined for each client are forwarded to the appropriate access point a Forwarding Allow
111. disabled the access point does not tag traffic passed to the wired network and ignores the VLAN tags on any received frames NOTE Before enabling VLAN tagging on the access point be sure to configure the attached network switch port to support tagged VLAN frames from the access point s management VLAN ID default VLAN IDs and other client VLAN IDs Otherwise connectivity to the access point will be lost when you enable the VLAN feature Using IEEE 802 1X and a central RADIUS server up to 64 VLAN IDs can be mapped to specific wireless clients allowing users to remain within the same VLAN as they move around a campus site This feature can also be used to control access to network resources from clients thereby improving security CHAPTER 5 SYSTEM CONFIGURATION A VLAN ID 1 4094 can be assigned to a client after successful IEEE 802 1X authentication The client VLAN IDs must be configured on the RADIUS server for each user authorized to access the network If a client does not have a configured VLAN ID on the RADIUS server the access point assigns the client to the configured default VLAN ID for the VAP interface NOTE When using IEEE 802 1X to dynamically assign VLAN IDs the access point i must have 802 1X authentication enabled and a RADIUS server configured Wireless clients must also support 802 1X client software When setting up VLAN IDs for each user on the RADIUS server be sure to use the RADIUS attributes and values a
112. door lla Building to Building config management vlanid 3 Outdoor lla Building to Building config Related Commands vlan 6 156 vlan id This command configures the default VLAN ID for the VAP interface Syntax vlan id lt vian id gt vlan id Native VLAN ID Range 1 4094 Default Setting 1 Command Mode Interface Configuration Wireless VAP Command Usage e To implement the default VLAN ID setting for VAP interface the access point must enable VLAN support using the vlan command e When VLANs are enabled the access point tags frames received from wireless clients with the default VLAN ID for the VAP interface If IEEE 802 1X is being used to authenticate wireless clients specific VLAN IDs can be configured on the RADIUS server to be assigned to each client Using IEEE 802 1X and a central RADIUS server up to 64 VLAN IDs can be mapped to specific wireless clients 6 157 CHAPTER 6 COMMAND LINE INTERFACE e f the VLAN ID has not been configured for a client on the RADIUS server then the frames are tagged with the default VLAN ID of the VAP interface Example Outdoor lla Building to Building if wireless g VAP 0 vlan id 3 Outdoor lla Building to Building if wireless g VAP 0 WMM Commands The access point implements QoS using the Wi Fi Multimedia WMM standard Using WMM the access point is able to prioritize traffic and optimize performance when multiple applications compete for wireless network bandwi
113. dress Specifies the recipient of SNMP notifications Enter the IP address or the host name Host Name 1 to 63 characters case sensitive SNMP a Trap Destination Community Name The community string sent with the notification operation Maximum length 23 characters case sensitive Default public Engine ID Sets the engine identifier for the SNMPv3 agent that resides on the access point This engine protects against message replay delay and redirection The engine ID is also used in combination with user passwords to generate the security keys for authenticating and encrypting SNMPv3 packets A default engine ID is automatically generated that is unique to the access point Range 10 to 64 hexadecimal characters NOTE If the local engine ID is deleted or changed all SNMP users will be cleared All existing users will need to be re configured If you want to change the default engine ID change it first before configuring other SNMP v3 parameters Figure 20 Trap Configuration Trap Configuration sysSystemUp Mi dotixMacAddrAuthF ail MsysSystemDown MdotixAuthNotinitiated MisysRadiusServerChanged MdotixAuthSuccess doti1StationAssociation MlocalMacAddrAuthSuccess 7 dott 1StationReAssociation MlocalMacAddrAuthFail Y dott 1StationAuthentication dotixAuthF ail dott 1StationRequestFail MdotixMacAddrAuthSuccess doti linterfaceAF ail Mi dott TinterfaceGFail sntpServerF all q a Trap Configuration Allow
114. ds refer to the following sections a Configuring Radio Settings on page 38 a Configuring Rogue AP Detection on page 73 a Configuring Common Radio Settings on page 39 a Configuring Wi Fi Multimedia on page 80 Only the radio settings specific to the 802 11g interface are included in this section To configure the 802 11g radio settings select the Radio Settings page CHAPTER 5 SYSTEM CONFIGURATION Figure 32 Radio Settings B G r Country Code UNITED STATES Description Enterprise 802 119 Access Point Client Access Mode btg 802 1ig only 802 11b only Turbo Mode Disable O Enable Super Mode Disable Enable Auto Channel Select O Disable Enable Radio Channel Antenna ID The original antenna provided with product Output Antenna Both O Left O Right Transmission Power 100 Maximum Transmit Data Rate 54 Mbps Maximum Multicast Data Rate 55 Mbps Beacon Interval 20 1000 100 Milliseconds Delivery Traffic Indication Message DTIM 1 255 1 Beacons Fragment Length 256 2346 2345 _ Bytes RTS Threshold 0 2347 2347 _ Bytes Preamble Length Short or Long Long Client Access Mode Selects the operating mode for the 802 11g wireless interface Default 802 11b g a 802 11b g Both 802 11b and 802 11g clients can communicate with the access point up to 54 Mbps a 802 11b only Both 802 11b and 802 11g clients can communicate with the access poi
115. dth at the same time WMM employs techniques that are a subset of the developing IEEE 802 11e QoS standard and it enables the access point to inter operate with both WMM enabled clients and other devices that may lack any WMM functionality The WMM commands supported by the access point are listed below Table 30 WMM Commands Command Function Mode Page wmm Sets the WMM operational mode on the access point IC W 6 158 wmm acknowledge Allows the acknowledgement wait time to be enabled IC W 6 159 policy or disabled for each Access Category AC wmmparam Configures detailed WMM parameters that apply to the IC W 6 160 access point AP or the wireless clients BSS wmm This command sets the WMM operational mode on the access point Use the no form to disable WMM Syntax no wmm lt supported required gt e supported WMM will be used for any associated device that supports this feature Devices that do not support this feature may still associate with the access point e required WMM must be supported on any device trying to associated with the access point Devices that do not support this feature will not be allowed to associate with the access point 6 158 Using the Command Line Interface Default supported Command Mode Interface Configuration Wireless Example Outdoor lla Building to Building if wireless a wmm required Outdoor lla Building to Building if wireless a wmm acknowledge policy This comma
116. e UI Management or IP Management settings Syntax APmgmtuUI lt SNMP Telnet Web enable disable gt e SNMP Specifies SNMP management access e Telnet Specifies Telnet management access e Web Specifies web based management access enable disable Enables or disables the selected management access method Default Setting All enabled Command Mode Global Configuration Example This example restricts management access to the indicated addresses Outdoor lla Building to Building config apmgmtui SNMP enable Outdoor lla Building to Building config Using the Command Line Interface show apmanagement This command shows the AP management configuration including the IP addresses of management stations allowed to access the access point as well as the interface protocols which are open to management access Command Mode Exec Example Outdoor lla Building to Building show apmanagement Management AP Information AP Management IP Mode Any IP Telnet UI Enable WEB UI Enable SNMP UI Enable Outdoor lla Building to Building 6 25 CHAPTER 6 COMMAND LINE INTERFACE show system This command displays basic system configuration settings Default Setting None Command Mode Exec Example Outdoor lla Building to Building show system System Information Serial Number System Up time System Name System Location System Contact System Country Code MAC Address IP Address Subnet Mask
117. e access point to obtain an IP address from a DHCP server Use the no form to restore the default IP address Syntax no ip dhcp Default Setting Enabled Command Mode Interface Configuration Ethernet Command Usage e You must assign an IP address to this device to gain management access over the network or to connect the access point to existing IP subnets You can manually configure a specific IP address using the ip address command or direct the device to obtain an address from a DHCP server using this command When you use this command the access point will begin broadcasting DHCP client requests The current IP address i e default or manually configured address will continue to be effective until a DHCP reply is received Requests will be broadcast periodically by this device in an effort to learn its IP address DHCP values can include the IP address subnet mask and default gateway Example Outdoor lla Building to Building config interface ethernet Enter Ethernet configuration commands one per line Outdoor lla Building to Building if ethernet ip dhcp Outdoor lla Building to Building if ethernet Related Commands ip address 6 107 6 108 Using the Command Line Interface speed duplex This command configures the speed and duplex mode of a given interface when autonegotiation is disabled Use the no form to restore the default Syntax speed duplex lt auto 10MH 10MF 100MF 100MH gt e auto
118. e client is known to be already authenticated so it proceeds directly to key exchange and association To support pre authentication both clients and access points in the network must be WPA2 enabled Pre authentication requires all access points in the network to be on the same IP subnet Example Outdoor lla Building to Building if wireless g VAP 0 wpa pre shared key ASCII agoodsecret Outdoor lla Building to Building if wireless g VAP 0 6 149 CHAPTER 6 COMMAND LINE INTERFACE Link Integrity Commands The access point provides a link integrity feature that can be used to ensure that wireless clients are connected to resources on the wired network The access point does this by periodically sending Ping messages to a host device in the wired Ethernet network If the access point detects that the connection to the host has failed it disables the radio interfaces forcing clients to find and associate with another access point When the connection to the host is restored the access point re enables the radio interfaces Table 28 Link Integrity Commands Command Function Mode Page ink integrity ping detect Enables link integrity detection GC 6 150 ink integrity ping host Specifies the IP address of a host device in the GC 6 151 wired network ink integrity ping interval Specifies the time between each Ping sent to the GC 6 151 link host ink integrity ping fail retry Specifies the number of consecutive
119. e for 802 11a 36 40 44 48 52 56 60 64 149 153 157 161 165 for normal mode and 42 50 58 152 160 for turbo mode Range for 802 11b g 1 to 14 e auto Automatically selects an unoccupied channel if available Otherwise the lowest channel is selected Default Setting Automatic channel selection Command Mode Interface Configuration Wireless Command Usage e The available channel settings are limited by local regulations which determine the number of channels that are available e When multiple access points are deployed in the same area be sure to choose a channel separated by at least two channels for 802 11a to avoid having the channels interfere with each other and at least five channels for 802 11b g You can deploy up to four access points in the same area for 802 11a e g channels 36 56 149 165 and three access points for 802 11b g e g channels 1 6 11 e For most wireless adapters the channel for wireless clients is automatically set to the same as that used by the access point to which it is linked Example Outdoor lla Building to Building if wireless g channel 1 Outdoor lla Building to Building if wireless g 6 116 Using the Command Line Interface transmit power This command adjusts the power of the radio signals transmitted from the access point Syntax transmit power lt signal strength gt signal strength Signal strength transmitted from the access point Options full
120. e is allowed Super Mode The Atheros proprietary Super A performance enhancements are supported by the access point These enhancements include bursting compression and fast frames Maximum throughput ranges between 40 to 60 Mbps for connections to Atheros compatible clients Default Disabled Auto Channel Select Enables the access point to automatically select an unoccupied radio channel Default Enabled i NOTE Check your country s regulations to see if Auto Channel can be disabled Radio Interface Radio Channel The radio channel that the access point uses to Normal Mode communicate with wireless clients When multiple access points 60 ch 5 300 GHz gt are deployed in the same area set the channel on neighboring 44ch 5 220GHz 48 ch 5 240 GHz access points at least four channels apart to avoid interference E i ch 5 260 GHz with each other For example in the United States you can 56 ch 5 280 GHz deploy up to four access points in the same area e g channels ERS MERE 36 56 149 165 Also note that the channel for wireless clients is automatically set to the same as that used by the access point to which it is linked Default Channel 60 for normal mode and channel 42 for Turbo mode Antenna ID Selects the antenna to be used by the access Turbo Mode point either the included diversity antennas or an optional 42ch 5210GH2 F external antenna The optional external antennas that are
121. e sure the client s address is included in the local filtering database or on the RADIUS server database f the wireless clients are roaming between bridges make sure that all the bridges and wireless devices in the Extended Service Set ESS are configured to the same SSID and authentication method If the bridge cannot be configured using the Telnet a web browser or SNMP software a Be sure to have configured the bridge with a valid IP address subnet mask and default gateway If VLANs are enabled on the bridge the management station should be configured to send tagged frames with a VLAN ID that matches the bridge s management VLAN default VLAN 1 page 15 However to manage the bridge from a wireless client the AP Management Filter should be disabled page 15 a Check that you have a valid network connection to the bridge and that the Ethernet port or the wireless interface that you are using has not been disabled If you are connecting to the bridge through the wired Ethernet interface check the network cabling between the management station and the bridge If you are connecting to bridge from a wireless client ensure that you have a valid connection to the bridge If you cannot connect using Telnet you may have exceeded the maximum number of concurrent Telnet sessions permitted i e four sessions Try connecting again at a later time If you cannot access the on board configuration program via a serial port
122. ed Shows if the station has passed 802 1X authentication and is now allowed to forward traffic to the access point a Key Type Displays one of the following e WEP Disabled The client is not using Wired Equivalent Privacy WEP encryption keys e Dynamic The client is using Wi Fi Protected Access 802 1X or pre shared key mode or using 802 1X authentication with dynamic keying e Static The client is using static WEP keys for encryption Event Logs The Event Logs window shows the log messages generated by the access point and stored in memory Figure 40 Event Logs Home AP i Event Logs k 4 Jan 01 00 00 00 Information Get time from SNTP Server Fail 2 Jan 01 00 00 00 Information Get time from SNTP Server Fail IS Jan 01 00 00 00 Noti ystem Up A Jan 01 00 00 00 Information Disable Telnet The Event Logs table displays the following information a Log Time The time the log message was generated a Event Level The logging level associated with this message For a description of the various levels see logging level on page 5 33 a Event Message The content of the log message Error Messages An example of a logged error message is Station Failed to authenticate unsupported algorithm This message may be caused by any of the following conditions 5 62 Security Access point was set to Open Authentication but a client sent an authentication request frame wi
123. een The bridge has a 10 100 Mbps Fast Ethernet connection but there is no activity a Flashing Indicates that the bridge is transmitting or receiving data on a 10 100 Mbps Ethernet LAN Flashing rate is proportional to network activity Off No link is present or the Ethernet LAN port is disabled 11a Green The 802 11a 5 3 GHz radio is enabled Three and RSSI Mode LEDs Flashing One fully lit LED indicates a low RSSI output level two LEDs a medium level and three LEDs the maximum level A flashing LED indicates an intermediate RSSI output level AP Mode o One fully lit LED indicates a low traffic rate two LEDs a medium rate and three LEDs the maximum rate A flashing LED indicates an intermediate traffic rate level Off No link is present or the 802 114 radio is disabled 3 9 LED Color Indicates 11g Amber The 802 119 2 4 GHz radio is enabled Three and RSSI Mode LEDs Flashing One fully lit LED indicates a low RSSI output level two LEDs a medium level and three LEDs the maximum level A flashing LED indicates an intermediate RSSI output level AP Mode o One fully lit LED indicates a low traffic rate two LEDs a medium rate and three LEDs the maximum rate eA flashing LED indicates an intermediate traffic rate level Off No link is present or the 802 11g radio is disabled ALIGN ANTENNAS After wireless bridge units have been mounted connected and their radio
124. efined in a Management Information Base MIB that provides a standard presentation of the information controlled by the agent SNMP defines both the format of the MIB specifications and the protocol used to access this information over the network The access point includes an onboard agent that supports SNMP versions 1 2c and 3 clients This agent continuously monitors the status of the access point as well as the traffic passing to and from wireless clients A network management station can access this information using SNMP management software that is compliant with MIB Il To implement SNMP management the access point must first have an IP address and subnet mask configured either manually or dynamically Access to the onboard agent using SNMP v1 and v2c is controlled by community strings To communicate with the access point the management station must first submit a valid community string for authentication Access to the access point using SNMP v3 provides additional security features that cover message integrity authentication and encryption as well as controlling notifications that are sent to specified user targets CONFIGURING SNMP AND TRAP MESSAGE PARAMETERS The access point SNMP agent must be enabled to function for versions 1 2c and 3 clients Management access using SNMP v1 and v2c also requires community strings to be configured for authentication Trap notifications can be enabled and sent to up to four management sta
125. egrity ping host 192 254 2 10 Outdoor lla Building to Building config link integrity ping interval This command configures the time between each Ping sent to the link host Syntax link integrity ping interval lt nterval gt interval The time between Pings Range 5 60 seconds Default Setting 30 seconds Command Mode Global Configuration 6 151 CHAPTER 6 COMMAND LINE INTERFACE Example Outdoor lla Building to Building config link integrity ping interval 20 Outdoor lla Building to Building config link integrity ping fail retry This command configures the number of consecutive failed Ping counts before the link is determined as lost Syntax link integrity ping fail retry lt counts gt counts The number of failed Ping counts before the link is determined as lost Range 1 10 Default Setting 6 Command Mode Global Configuration Example Outdoor lla Building to Building config link integrity ping fail retry 10 Outdoor lla Building to Building config link integrity ethernet detect This command enables an integrity check to determine whether or not the access point is connected to the wired Ethernet 6 152 Using the Command Line Interface Syntax no link integrity ethernet detect Default Setting Disabled Command Mode Global Configuration Example Outdoor lla Building to Building config link integrity ethernet detect Notification Ethernet Link Detect SUCCESS RA
126. eight Building B is only three stories high or 9 m 30 ft but is located at an elevation that is 12 m 39 ft higher than building A To mount an antenna at the required height on building B a mast or pole of only 1 3 m 4 3 ft is needed WARNING Never construct a radio mast pole or tower near overhead power lines NOTE Local regulations may limit or prevent construction of a high radio mast or tower If your wireless bridge link requires a high radio mast or tower consult a professional contractor for advice 2 5 ANTENNA POSITION AND ORIENTATION Once the required antenna height has been determined other factors affecting the precise position of the wireless bridge must be considered e Be sure there are no other radio antennas within 2 m 6 ft of the wireless bridge e Place the wireless bridge away from power and telephone lines e Avoid placing the wireless bridge too close to any metallic reflective surfaces such as roof installed air conditioning equipment tinted windows wire fences or water pipes e The wireless bridge antennas at both ends of the link must be positioned with the same polarization direction either horizontal or vertical Antenna Polarization The wireless bridge s integrated antenna sends a radio signal that is polarized in a particular direction The antenna s receive sensitivity is also higher for radio signals that have the same polarization To maximize the performance of the wireless link
127. eless Command Usage The beacon signals allow wireless clients to maintain contact with the access point They may also carry power management information Example Outdoor lla Building to Building if wireless g beacon interval 150 Outdoor lla Building to Building if wireless g 6 121 CHAPTER 6 COMMAND LINE INTERFACE dtim period This command configures the rate at which stations in sleep mode must wake up to receive broadcast multicast transmissions Syntax dtim period lt interva gt interval Interval between the beacon frames that transmit broadcast or multicast traffic Range 1 255 beacon frames Default Setting 1 Command Mode Interface Configuration Wireless Command Usage e The Delivery Traffic Indication Map DTIM packet interval value indicates how often the MAC layer forwards broadcast multicast traffic This parameter is necessary to wake up stations that are using Power Save mode e The DTIM is the interval between two synchronous frames with broadcast multicast information The default value of 2 indicates that the access point will save all broadcast multicast frames for the Basic Service Set BSS and forward them after every second beacon e Using smaller DTIM intervals delivers broadcast multicast frames in a more timely manner causing stations in Power Save mode to wake up more often and drain power faster Using higher DTIM values reduces the power used by stations in Power Save mode but del
128. eless client s MAC address The MAC list can be configured to allow or deny network access to specific clients System Default Specifies a default action for all unknown MAC addresses that is those not listed in the local MAC database e Deny Blocks access for all MAC addresses except those listed in the local database as Allow e Allow Permits access for all MAC addresses except those listed in the local database as Deny MAC Authentication Settings Enters specified MAC addresses and permissions into the local MAC database e MAC Address Physical address of a client Enter six pairs of hexadecimal digits separated by hyphens for example 00 90 D1 12 AB 89 e Permission Select Allow to permit access or Deny to block access If Delete is selected the specified MAC address entry is removed from the database e Update Enters the specified MAC address and permission setting into the local database MAC Authentication Table Displays current entries in the local MAC database Filter Control FILTER CONTROL The access point can employ network traffic frame filtering to control access to network resources and increase security You can prevent communications between wireless clients and prevent access point management from wireless clients Also you can block specific Ethernet traffic from being forwarded by the access point Figure 17 Filter Control SYSTEM E Fitter Control e identification f VLAN en a TC
129. em Log Setup Enables the logging of error messages Default Disable Logging Level Sets the minimum severity level for event logging Default Informational CHAPTER 5 SYSTEM CONFIGURATION Logging Host Enables the sending of log messages to a Syslog server host Up to four Syslog servers are supported on the access point Default Disable Server Name IP Specifies a Syslog server name or IP address Default 0 0 0 0 SNTP Server Enables the sending of log messages to a Syslog server host Default Disable Primary Server The IP address the primary Syslog server Default 0 0 0 0 Secondary Server The IP address the secondary Syslog server Default 0 0 0 0 Enter Time Zone Sets the desired time zone or GMT Enable Daylight Saving Adjusts the clock for summertime and wintertime The system allows you to limit the messages that are logged by specifying a minimum severity level The following table lists the error message levels from the most severe Emergency to least severe Debug The message levels that are logged include the specified minimum level up to the Emergency level Table 2 Logging Levels Error Level Description Emergency System unusable Alerts Immediate action needed Critical Critical conditions e g memory allocation or free memory error resource exhausted Error Error conditions e g invalid input default used Warning Warning conditions e g return f
130. entication for the VAP interface Syntax auth lt open system shared key wpa wpa psk wpa2 wpa2 psk Wpa wpa2 mixed wpa wpa2 psk mixed gt lt required supported gt open system Accepts the client without verifying its identity using a shared key Open authentication means either there is no encryption if encryption is disabled or WEP only encryption is used if encryption is enabled shared key Authentication is based on a shared key that has been distributed to all stations e wpa Clients using WPA are accepted for authentication wpa psk Clients using WPA with a Pre shared Key are accepted for authentication wpa2 Clients using WPA2 are accepted for authentication wpa2 psk Clients using WPA2 with a Pre shared Key are accepted for authentication wpa wpa2 mixed Clients using WPA or WPA2 are accepted for authentication wpa wpa2 psk mixed Clients using WPA or WPA2 with a Pre shared Key are accepted for authentication required Clients are required to use WPA or WPA2 supported Clients may use WPA or WPA2 if supported Default Setting open system Command Mode Interface Configuration Wireless VAP Command Usage e The auth command automatically configures settings for each authentication type including encryption 802 1X and cipher suite The command auth open system disables encryption and 802 1X 6 140 Using the Command Line Interface To use WEP shared key authentication
131. er name admin and the password password then press LOGIN For a new access point installation the default WLAN Service Area ESSID is 3Com and no security is set Unless it detects a DHCP server on the network the access point uses Auto IP to assign an IP address of the form 169 254 2 1 Use the 3Com Wireless Infrastructure Device Manager to locate 3Com Wireless LAN devices and launch their configurations When installing the device manager make sure the computer is connected to the same network as the device to be configured After installing and launching the device manager select the device to be configured from network tree and click Configure to launch the configuration Web interface When the home page displays click on Advanced Setup The following page will display 5 1 CHAPTER 5 SYSTEM CONFIGURATION Figure 11 Advanced Setup Advanced Setup Advanced setup is designed for advanced users After modification click Apply to save the changes 802 1 1b q Interface acl a e Radio Settings EET 4 e Security The information in this chapter is organized to reflect the structure of the web screens for easy reference However it is recommended that you configure a user name and password as the first step under Administration to control management access to this device page 5 23 ADVANCED SETUP The Advanced Setup pages include the following options Table 1 Advanced Setup Menu Des
132. er on another subnet Responses from the DHCP server are returned to the access point which then broadcasts them back to clients Table 15 DHCP Relay Commands Command Function Mode Page dhcp relay enable Enables the DHCP relay agent GC 6 42 dhcp relay Sets the primary and secondary DHCP server GC 6 43 address show dhcp relay Shows current DHCP relay configuration Exec 6 43 settings dhcp relay enable This command enables the access point s DHCP relay agent Use the no form to disable the agent Syntax no dhcp relay enable Default Setting Disabled Command Mode Global Configuration Command Usage e For the DHCP relay agent to function the primary DHCP server must be configured using the dhcp relay primary command A secondary DHCP server does not need to be configured but it is recommended e If there is no response from the primary DHCP server and a secondary server has been configured the agent will then attempt to send DHCP requests to the secondary server Using the Command Line Interface Example Outdoor lla Building to Building config dhcp relay enable Outdoor lla Building to Building config dhcp relay This command configures the primary and secondary DHCP server addresses Syntax dhcp relay lt primary secondary gt lt p_address gt e primary The primary DHCP server e secondary The secondary DHCP server e jp_address IP address of the server Default Setting Primary and secon
133. erver e jp IP address of an time server NTP or SNTP Default Setting 137 92 140 80 192 43 244 18 Command Mode Global Configuration Command Usage When SNTP client mode is enabled using the sntp server enable command the sntp server ip command specifies the time servers from which the access point polls for time updates The access point will poll the time servers in the order specified until a response is received Example Outdoor lla Building to Building config sntp server ip 10 1 0 19 Outdoor lla Building to Building Related Commands sntp server enable 6 38 show sntp 6 41 sntp server enable This command enables SNTP client requests for time synchronization with NTP or SNTP time servers specified by the sntp server ip command Use the no form to disable SNTP client requests Syntax no sntp server enable Using the Command Line Interface Default Setting Enabled Command Mode Global Configuration Command Usage The time acquired from time servers is used to record accurate dates and times for log events Without SNTP the access point only records the time starting from the factory default set at the last bootup i e 00 14 00 January 1 1970 Example Outdoor lla Building to Building config sntp server enable Outdoor lla Building to Building config Related Commands sntp server ip 6 38 show sntp 6 41 sntp server date time This command sets the system clock Default Setting 0
134. et suite of protocols which offers network management services Simple Network Time Protocol SNTP SNTP allows a device to set its internal clock based on periodic updates from a Network Time Protocol NTP server Updates can be requested from a specific NTP server or can be received via broadcasts sent by NTP servers Temporal Key Integrity Protocol TKIP A data encryption method designed as a replacement for WEP TKIP avoids the problems of WEP static keys by dynamically changing data encryption keys Trivial File Transfer Protocol TFTP A TCP IP protocol commonly used for software downloads Virtual Access Point VAP Virtual AP technology multiplies the number of Access Points present within the RF footprint of a single physical access device With Virtual AP technology WLAN users within the device s footprint can associate with what appears to be different access points and their associated Glossary 4 network services All the services are delivered using a single radio channel enabling Virtual AP technology to optimize the use of limited WLAN radio spectrum Virtual LAN VLAN A Virtual LAN is a collection of network nodes that share the same collision domain regardless of their physical location or connection point in the network A VLAN serves as a logical workgroup with no physical barriers and allows users to share information and resources as though located on the same LAN Wi Fi Protected Access WPA emplo
135. etting 3 Command Mode Global Configuration Example Outdoor lla Building to Building config radius server retransmit 5 Outdoor lla Building to Building config radius server timeout This command sets the interval between transmitting authentication requests to the RADIUS server Syntax radius server secondary timeout number_of_seconds e secondary Secondary server e number_of_seconds Number of seconds the access point waits for a reply before resending a request Range 1 60 Default Setting 5 Command Mode Global Configuration Example Outdoor lla Building to Building config radius server timeout 10 Outdoor lla Building to Building config radius server port accounting This command sets the RADIUS Accounting server network port Syntax radius server secondary port accounting lt port_number gt e secondary Secondary server If secondary is not specified then the access point assumes you are configuring the primary RADIUS server e port_number RADIUS Accounting server UDP port used for accounting messages Range 0 or 1024 65535 Using the Command Line Interface Default Setting O disabled Command Mode Global Configuration Command Usage e When the RADIUS Accounting server UDP port is specified a RADIUS accounting session is automatically started for each user that is successfully authenticated to the access point Example Outdoor lla Building to Building config radius server port
136. ey cryptography AES provides very strong encryption using a completely different ciphering algorithm to TKIP and WEP Authentication The process to verify the identity of a client requesting network access IEEE 802 11 specifies two forms of authentication open system and shared key Backbone The core infrastructure of a network The portion of the network that transports information from one central location to another central location where it is unloaded onto a local system Basic Service Set BSS A set of 802 11 compliant stations and an access point that operate as a fully connected wireless network Beacon A signal periodically transmitted from the access point that is used to identify the service set and to maintain contact with wireless clients Glossary 1 Broadcast Key Broadcast keys are sent to stations using 802 1X dynamic keying Dynamic broadcast key rotation is often used to allow the access point to generate a random group key and periodically update all key management capable wireless clients CSMA CA Carrier Sense Multiple Access with Collision Avoidance Dynamic Host Configuration Protocol DHCP Provides a framework for passing configuration information to hosts on a TCP IP network DHCP is based on the Bootstrap Protocol BOOTP adding the capability of automatic allocation of reusable network addresses and additional configuration options Encryption Data passing between the access point and c
137. failed Ping GC 6 152 counts before the link is determined as lost ink integrity ethernet detect Enables integrity check for Ethernet link GC 6 152 show link integrity Displays the current link integrity configuration Exec 6 153 link integrity ping detect This command enables link integrity detection Use the no form to disable link integrity detection Syntax no link integrity ping detect Default Setting Disabled Command Mode Global Configuration Command Usage e When link integrity is enabled the IP address of a host device in the wired network must be specified e The access point periodically sends an ICMP echo request Ping packet to the link host IP address When the number of failed responses either the 6 150 Using the Command Line Interface host does not respond or is unreachable exceeds the limit set by the link integrity ping fail retry command the link is determined as lost Example Outdoor lla Building to Building config link integrity ping detect Outdoor lla Building to Building config link integrity ping host This command configures the link host name or IP address Use the no form to remove the host setting Syntax link integrity ping host lt host_name ip_address gt no link integrity ping host e host_name Alias of the host e jp_address IP address of the host Default Setting None Command Mode Global Configuration Example Outdoor lla Building to Building config link int
138. fast roaming for authenticated clients by retaining keys and other security information in a cache so that if a client roams away from an access point and then returns re authentication is not required When a WPA2 client is first authenticated it receives a Pairwise Master Key PMK that is used to generate other keys for unicast data encryption This key and other client information form a Security Association that the access point names and holds in a cache a Preauthentication Each time a client roams to another access point it has to be fully re authenticated This authentication process is time consuming and can disrupt applications running over the network WPA2 includes a mechanism known as pre authentication that allows clients to roam to a new access point and be quickly associated The first time a client is authenticated to a wireless network it has to be fully authenticated When the client is about to roam to another access point in the network the access point sends pre authentication messages to the new access point that include the client s security association information Then when the client sends an association request to the new access point the client is known to be already authenticated so it proceeds directly to key exchange and association The configuration settings for WPA are summarized below Table 6 WPA Configuration Settings WPA and WPA2 pre shared key only WPA and WPA2 over 802 1X Encryption Enabled En
139. forwarding a packet from that LAN to the root device All ports connected to designated bridging devices are assigned as designated ports After determining the lowest cost spanning tree it enables all root ports and designated ports and disables all other ports Network packets are therefore only forwarded between root ports and designated ports eliminating any possible network loops Once a stable network topology has been established all bridges listen for Hello BPDUs Bridge Protocol Data Units transmitted from the root bridge If a bridge does not get a Hello BPDU after a predefined interval Maximum Age the bridge assumes that the link to the root bridge is down This bridge will then initiate negotiations with other bridges to reconfigure the network to reestablish a valid network topology a Bridge Enables disables STP on the wireless bridge or repeater Default Disabled a Bridge Priority Used in selecting the root device root port and designated port The device with the highest priority becomes the STP root device However if all devices have the same priority the device with the lowest MAC address will then become the root device Note that lower numeric values indicate higher priority CHAPTER 5 SYSTEM CONFIGURATION e Range 0 65535 e Default 32768 a Bridge Max Age The maximum time in seconds a device can wait without receiving a configuration message before attempting to reconfigure All device p
140. g config bridge stp hello time Use this command to configure the spanning tree bridge hello time globally for the wireless bridge Use the no form to restore the default Syntax bridge stp hello time lt time gt no bridge stp hello time time Time in seconds Range 1 10 seconds The maximum value is the lower of 10 or max age 2 1 Default Setting 2 seconds Command Mode Global Configuration Command Usage This command sets the time interval in seconds at which the root device transmits a configuration message Example Outdoor lla Building to Building config bridge stp hello time 5 Outdoor lla Building to Building config bridge stp max age Use this command to configure the spanning tree bridge maximum age globally for the wireless bridge Use the no form to restore the default 6 101 CHAPTER 6 COMMAND LINE INTERFACE Syntax bridge stp max age lt seconds gt no bridge stp max age seconds Time in seconds Range 6 40 seconds The minimum value is the higher of 6 or 2 x hello time 1 The maximum value is the lower of 40 or 2 x forward time 1 Default Setting 20 seconds Command Mode Global Configuration Command Usage This command sets the maximum time in seconds a device can wait without receiving a configuration message before attempting to reconfigure All device ports except for designated ports should receive configuration messages at regular intervals Any port that ages out
141. g new software verify that the access point is connected to the network and has been configured with a compatible IP address and subnet mask If you need to download from an FIP or TFIP server take the following additional steps a Obtain the IP address of the FTP or TFTP server where the access point software is stored 5 26 Administration a f upgrading from an FTP server be sure that you have an account configured on the server with a user name and password a If VLANs are configured on the access point determine the VLAN ID with which the FTP or TFTP server is associated and then configure the management station or the network port to which it is attached with the same VLAN ID If you are managing the access point from a wireless client the VLAN ID for the wireless client must be configured on a RADIUS server Current version Version number of runtime code Firmware Upgrade Local Downloads an operation code image file from the web management station to the access point using HTTP Use the Browse button to locate the image file locally on the management station and click Start Upgrade to proceed a New firmware file Specifies the name of the code file on the server The new firmware file name should not contain slashes or the leading letter of the file name should not be a period and the maximum length for file names is non 32 characters for files on the access point Valid characters A Z a z
142. gits 0 9 and A F for 64 bit keys 26 hexadecimal digits for 128 bit keys or 32 hexadecimal digits for 152 bit keys 802 11a radio only This is the default setting e Alphanumeric Enter keys as 5 alphanumeric characters for 64 bit keys 13 alphanumeric characters for 128 bit keys or 16 alphanumeric characters for 152 bit keys 802 11a radio only Key Selects the key number to use for encryption for each VAP interface If the clients have all four keys configured to the same values you can change the encryption key to any of the four settings without having to update the client keys Default Key 1 i NOTE Key index and type must match that configured on the clients Lil NOTE In a mixed mode environment with clients using static WEP keys and WPA select WEP transmit key index 2 3 or 4 The access point uses transmit key index 1 for the generation of dynamic keys Wi Fi Protected Access WPA WPA employs a combination of several technologies to provide an enhanced security solution for 802 11 wireless networks The access point supports the following WPA components and features IEEE 802 1X and the Extensible Authentication Protocol EAP WPA employs 802 1X as its basic framework for user authentication and dynamic key management The 802 1X client and RADIUS server should use an appropriate EAP type such as EAP TLS Transport Layer Security EAP TTLS Tunneled TLS or PEAP Protected EAP for strongest authenti
143. gured RADIUS server for authentication When using a RADIUS authentication server for MAC address authentication the server must first be configured in the Radius window see RADIUS on page 8 The database of MAC addresses and filtering policy must be defined in the RADIUS server NOTE MAC addresses on the RADIUS server can be entered in four different formats see RADIUS on page 8 You can enable 802 1X as optionally supported or as required to enhance the security of the wireless network Default Disable a Disable The access point does not support 802 1X authentication for any wireless client After successful wireless association with the access point each client is allowed to access the network Supported The access point supports 802 1X authentication only for clients initiating the 802 1X authentication process i e the access point does not initiate 802 1X authentication For clients initiating 802 1X only those successfully authenticated are allowed to access the network For those clients not initiating 802 1X access to the network is allowed after successful wireless association with the access point The 802 1X supported mode allows access for clients not using WPA or WPA2 security a Required The access point enforces 802 1X authentication for all associated wireless clients If 802 1X authentication is not initiated by a client the access point will initiate authentication Only those clients successfu
144. gures the time interval after which clients must IC W VAP 6 128 be re authenticated shutdown Disables the wireless interface IC W VAP 6 128 show interface wireless Shows the status for the wireless interface Exec 6 129 show station Shows the wireless clients associated with the access Exec 6 133 interface wireless point This command enters wireless interface configuration mode Syntax interface wireless lt a g gt e a 802 114 radio interface e g 802 119 radio interface Default Setting None Command Mode Global Configuration Example To specify the 802 11a interface enter the following command Outdoor lla Building to Building config interface wireless a Outdoor 1la Building to Building if wireless a 6 112 Using the Command Line Interface vap This command provides access to the VAP Virtual Access Point interface configuration mode Syntax vap lt vap id gt vap id The number that identifies the VAP interface Options 0 3 Default Setting None Command Mode Interface Configuration Wireless Example Outdoor lla Building to Building if wireless g vap 0 Outdoor lla Building to Building if wireless g VAP 0 speed This command configures the maximum data rate at which the access point transmits unicast packets Syntax speed lt speed gt speed Maximum access speed allowed for wireless clients Options for 802 11a 6 9 12 18 24 36 48 54 Mbps Options for 802
145. he antenna control method to use for the IC W 6 119 radio antenna id Selects the antenna ID to use for the radio IC W 6 120 antenna location Selects the location of the antenna IC W 6 120 beacon interval Configures the rate at which beacon signals are IC W 6 121 transmitted from the access point dtim period Configures the rate at which stations in sleep mode IC W 6 122 must wake up to receive broadcast multicast transmissions fragmentation length Configures the minimum packet size that can be IC W 6 123 fragmented rts threshold Sets the packet size threshold at which an RTS must IC W 6 123 be sent to the receiving station prior to the sending station starting communications super a Enables Atheros proprietary Super A performance IC W a 6 124 enhancements super g Enables Atheros proprietary Super G performance IC W b g 6 125 enhancements description Adds a description to the wireless interface IC W VAP 6 125 6 111 CHAPTER 6 COMMAND LINE INTERFACE Command Function Mode Page ssid Configures the service set identifier IC W VAP 6 126 closed system Opens access to clients without a pre configured IC W VAP 6 126 SSID max association Configures the maximum number of clients that can IC W VAP 6 127 be associated with the access point at the same time assoc timeout interval Configures the idle time interval when no frames are IC W VAP 6 127 sent after which a client is disassociated from the VAP interface auth timeout value Confi
146. he wireless clients WMM AP Parameters These parameters apply to the access point logCWMin Minimum Contention Window The initial upper limit of the random backoff wait time before wireless medium access can be attempted The 5 48 Radio Interface initial wait time is a random value between zero and the CWMin value Specify the CWMin value in the range 0 15 microseconds Note that the CWMin value must be equal or less than the CWMax value logCWMax Maximum Contention Window The maximum upper limit of the random backoff wait time before wireless medium access can be attempted The contention window is doubled after each detected collision up to the CWMax value Specify the CWMax value in the range 0 15 microseconds Note that the CWMax value must be greater or equal to the CWMin value AIFS Arbitration Inter Frame Space The minimum amount of wait time before the next data transmission attempt Specify the AIFS value in the range 0 15 microseconds TXOP Limit Transmit Opportunity Limit The maximum time an AC transmit queue has access to the wireless medium When an AC queue is granted a transmit opportunity it can transmit data for a time up to the TxOpLimit This data bursting greatly improves the efficiency for high data rate traffic Specify a value in the range 0 65535 microseconds Admission Control The admission control mode for the access category When enabled clients are blocked from using the access
147. hem after every beacon Using smaller DTIM intervals delivers broadcast multicast frames in a more timely manner causing stations in Power Save mode to wake up more often and drain power faster Using higher DTIM values reduces the power used by stations in Power Save mode but delays the transmission of broadcast multicast frames Range 1 255 beacons Default 1 beacon Fragment Length 256 2346 Configures the minimum packet size that can be fragmented when passing through the access point Fragmentation of the PDUs Package Data Unit can increase the reliability of transmissions because it increases the probability of a successful transmission due to smaller frame size If there is significant interference present or collisions due to high network utilization try setting the fragment size to send smaller fragments This will speed up the retransmission of smaller frames However it is more efficient to set the fragment size larger if very little or no interference is present because it requires overhead to send multiple frames Range 256 2346 bytes Default 2346 bytes RTS Threshold Sets the packet size threshold at which a Request to Send RTS signal must be sent to a receiving station prior to the sending station starting communications The access point sends RTS frames to a receiving station to 5 42 Radio Interface negotiate the sending of a data frame After receiving an RTS frame the station sends a CTS clear to se
148. hen there are more subtree IDs than bits in the mask the mask is padded with ones CHAPTER 6 COMMAND LINE INTERFACE Example Outdoor lla Building to Building config snmp server filter trapfilter include 1 Outdoor lla Building to Building config snmp server filter trapfilter exclude 21 3 6 20 Te2020 Pet 323 snmp server filter assignments This command assigns SNMP v3 notification filters to targets Use the no form to remove an SNMP v3 filter assignment Syntax snmp server filter assignments lt target id gt lt filter id gt no snmp server filter assignments lt target id gt e target id A user defined name that identifies a receiver of SNMP notifications Maximum length 32 characters e filter id A user defined name that identifies an SNMP v3 notification filter Maximum length 32 characters Default Setting None Command Mode Global Configuration Example Outdoor lla Building to Building config snmp server filter assignments mytraps trapfilter Outdoor lla Building to Building config exit Outdoor lla Building to Building show snmp target Host ID mytraps User chris IP Address 192 294 5233 UDP Port i 62 Outdoor lla Building to Building show snmp filter assignments HostID FilterID mytraps trapfilter Outdoor lla Building to Building config show snmp groups This command displays the SNMP v3 pre defined groups 6 56 Using the Command Line Interface Syntax show snmp groups Co
149. here may not be a central lobe peak in the voltage because vertical alignment is too far off only two similar peaks for the side lobes are detected In this case fix the antenna so that it is halfway between the two peaks 3 Loosen the vertical adjustment on the mounting bracket and tilt the antenna slowly up and down while checking the LEDs 4 Find the point where the signal is strongest and secure the vertical adjustment in that position INITIAL CONFIGURATION The 3Com Outdoor 11a Building to Building Bridge and 11bg Access Point offers a variety of management options including a web based interface The initial configuration steps can be made through the web browser interface The access point requests an IP address via DHCP by default If no response is received from the DHCP server then the access point uses the default address 169 254 2 1 If the default AP configuration does not meet your network requirements or if you want to customize the settings for your own network you can use these tools to change the configuration 1 Launch the 3Com Wireless Infrastructure Device Manager Widman utility 2 Directly connect to the device through it s Ethernet port or console port NETWORKS WITH A DHCP SERVER If your network has a DHCP server an IP address is automatically assigned to the AP It takes between one and two minutes for the Access Point to determine if there is a DHCP server on the network Use the 3Com Wireless Infras
150. hese steps 1 Mount the unit on a wall pole mast or tower using the mounting bracket 2 Mount external antennas on the same supporting structure as the bridge and connect them to the bridge unit 3 Connect the Ethernet cable and a grounding wire to the unit 4 Connect the power injector to the Ethernet cable a local LAN switch and an AC power source 5 Align antennas at both ends of the link 3 1 TESTING BASIC LINK OPERATION Set up the units over a very short range 15 to 25 feet either outdoors or indoors Connect the units as indicated in this chapter and be sure to perform all the basic configuration tasks outlined in Chapter 4 Initial Configuration When you are satisfied that the links are operating correctly proceed to mount the units in their intended locations MOUNT THE UNIT The bridge can be mounted on the following types of surfaces Pole a Wall A CAUTION The bridge is intended for outdoor use only Do not install the bridge indoors USING THE POLE MOUNTING BRACKET Perform the following steps to mount the unit to a 1 5 to 2 inch diameter steel pole or tube using the mounting bracket 1 Place the V shaped part of the bracket around the pole and tighten the securing nuts just enough to hold the bracket to the pole The bracket may need to be rotated around the pole during the antenna alignment process Attach V shaped parts to pole with provided nuts and bolts 3 2 2 Fit the edges
151. hort range 1 3 km POINT TO MULTIPOINT CONFIGURATION A wireless bridge set to Master mode can use an omnidirectional antenna to connect to as many as six bridges in a point to multipoint configuration There can only be one Master unit in the wireless bridge network all other bridges must be set as Slave units The following figure shows a point to multipoint star configuration with one bridge set to Master and using an omnidirectional antenna The following figure shows a point to multipoint in line configuration with one bridge set to Master and using a directional panel antenna ion 9 Beam ae es Angle N y i T A aT y BRIDGE LINK PLANNING The 3Com Outdoor 11a Building to Building Bridge and 11bg Access Point supports fixed point to point or point to multipoint wireless links A single link between two points can be used to connect a remote site to larger core network Multiple bridge links can provide a way to connect widespread Ethernet LANs For each link in a wireless bridge network to be reliable and provide optimum performance some careful site planning is required This chapter provides guidance and infor
152. htly secure the wireless bridge to the bracket p ON vW 8 amp t m 3 5 CONNECT EXTERNAL ANTENNAS The bridge s primary antenna is it s built in internal antenna For some applications when deploying an WL 575 unit for a bridge link or access point operation you may need to mount external antennas and connect them to the bridge Typically a bridge link requires a 5 0 GHz antenna and access point operation a 2 4 GHz antenna WL 575 units acting as managed APs also require an external antenna for 2 4 GHz operation Perform these steps 1 Mount the external antenna to the same supporting structure as the bridge within 3 m 10 ft distance using the bracket supplied in the antenna package 2 Connect the antenna to the bridge s N type connector using the RF coaxial cable provided in the antenna package 3 Apply weatherproofing tape to the antenna connectors to help prevent water entering the connectors 2 4 GHz 5 GHz 2 4 GHz N type Connector N type Connector N type Connector 5 GHz External High gain Panel Antenna F ay O O O J A dg 2 4 GHz External Omnidirectional Antenna al y RF Coaxial Cable 3 6 CONNECT CABLES TO THE UNIT WARNING Do not connect or disconnect cables or otherwise work with the bridge during periods of lightning activity 1 Attach the Ethernet cable to the Etherne
153. idge units for which this unit serves as the bridge parent or the root bridge 12 hexadecimal digits in the form XX XX XX XX XX XX Figure 26 Spanning Tree Protocol A H Spanning Tree Protocol Setting Bridge Enable ODisabie Dynamic Entry Age ime 300 1 10000 sec Bridge Priority 32768 1 65535 Bridge Max Age 20 6 40 sec Bridge Hello Time z 1 10 sec 7 Bridge Forwarding Delay 15 4 30 sec E Radio Interface 1 802 11a Index Link Path Cost 1 65535 Link Port Pnonty 0 255 ParentNode 19 128 ChildNode2 19 128 Child Node3 19 128 Chit Node4 1g 128 Child NodeS 19 128 Child Node 119 128 WDS and Spanning Tree Settings Figure 27 Spanning Tree Protocol E Radio interface 2 802 11g Index Link Path Cost 1 65535 Link Port Prority 0 255 ParentNode 19 128 Chili Node 19 128 Chiki Node3 19 128 Child Nodes 19 128 Chid NodeS 19 128 Child Node 19 128 Ethemeat intertace Link Path Cost 1 65535 Link Port Priontyw 0 255 19 128 D0 Spanning Tree Protocol STP uses a distributed algorithm to select a bridging device STP compliant switch bridge or router that serves as the root of the spanning tree network It selects a root port on each bridging device except for the root device which incurs the lowest path cost when forwarding a packet from that device to the root device Then it selects a designated bridging device from each LAN which incurs the lowest path cost when
154. ients 5 42 maximum data rate 6 115 802 11a interface 6 115 802 119 interface 6 115 MDI RJ 45 pin configuration 1 5 O OFDM 1 2 open system 4 9 5 50 6 126 R radio channel 802 11a interface 6 116 802 11g interface 5 45 6 116 configuring 4 7 RADIUS 5 8 5 57 6 65 RADIUS logon authentication 5 14 6 65 Remote Authentication Dial in User Service See RADIUS Request to Send See RTS reset 6 11 resetting the access point 6 11 restarting the system 5 28 6 11 RJ 45 port configuring duplex mode 6 109 configuring speed 6 109 RTS threshold 5 42 5 43 6 123 S Secure Socket Layer See SSL security options 5 50 session key 5 10 5 14 6 75 shared key 4 9 5 57 6 143 Simple Network Time Protocol See SNTP SNMP 5 19 6 44 community name 6 46 community string 6 46 enabling traps 5 20 6 48 trap destination 5 20 6 48 trap manager 5 20 6 48 SNTP 5 34 5 35 6 38 enabling client 5 35 6 38 server 5 35 6 38 software displaying version 5 25 5 60 6 27 downloading 5 27 6 62 SSID 6 126 configuring 4 6 SSL 6 21 STA interface settings 6 103 to path cost 6 103 port priority 6 104 startup files setting 6 61 station status 5 61 6 133 status displaying device status 5 60 6 26 displaying station status 5 61 6 133 straight through cable B 3 system clock setting 5 35 6 39 system log enabling 5 33 6 33 server 5 33 6 33 system software downloading from server 5 25 6 62 T Telnet for managenet access 6
155. if conduits bracing or other structures are required for safety or protection of the cable e For lightning protection at the power injector end of the cable use a lightning arrestor immediately before the Ethernet cable enters the building GROUNDING It is important that the wireless bridge cables and any supporting structures are properly grounded The wireless bridge unit includes a grounding screw for attaching a ground wire Be sure that grounding is available and that it meets local and national electrical codes 2 8 3 HARDWARE INSTALLATION Before mounting antennas to set up your wireless bridge links be sure you have selected appropriate locations for each antenna Follow the guidance and information in Chapter 2 Wireless Link Planning Also before mounting units in their intended locations you should first perform initial configuration and test the basic operation of the wireless bridge links in a controlled environment over a very short range See the section Testing Basic Link Operation in this chapter The wireless bridge includes its own bracket kit for mounting the unit to a 1 5 to 2 inch diameter steel pole or tube The pole mounting bracket allows the unit to be mounted to part of a radio mast or tower structure The unit also has a wall mounting bracket kit that enables it to be fixed to a building wall or roof when using external antennas Hardware installation of the wireless bridge involves t
156. ilter id A user defined name that identifies an SNMP v3 notification filter Maximum length 32 characters 6 58 Using the Command Line Interface Command Mode Exec Example Outdoor lla Building to Building show snmp filter Filter trapfilter Type include Subtree iso 3 6 1 2 1 2 2 1 Type exclude Subtree 180 326 162 1 6262 161623 Outdoor lla Building to Building show snmp filter assignments This command displays the SNMP v3 notification filter assignments Syntax show snmp filter assignments Command Mode Exec Example Outdoor lla Building to Building show snmp filter assignments HostID FilterID mytraps trapfilter Outdoor lla Building to Building 6 59 CHAPTER 6 COMMAND LINE INTERFACE show snmp This command displays the SNMP configuration settings Command Mode Exec Example Outdoor lla Building to Building show snmp SNMP Information Service State Enable Community ro LK RRR Community rw LKR KR Location WC 19 Contact Paul Engineld 80 00 07 e5 80 00 00 2e 62 00 00 00 18 EngineBoots 1 Trap Destinations Le 192 254 2 9 Community State Enabled 2 0 0 0 0 Community State Disabled 33 0 0 0 0 Community State Disabled 4 0 0 0 0 Community State Disabled dotlliInterfaceAGFail Enabled dotlliInterfaceBFail Enabled dot1l1iStationAssociation Enabled dot11StationAuthentication Enabled dot11StationReAssociation Enabled dot11StationRequest
157. in the 5 GHz band at up to 54 Mbps in normal mode or up to 108 Mbps in Turbo mode First configure the radio settings that apply to the individual VAPs Virtual Access Point and the common radio settings that apply to the overall system After you have configured the radio settings go to the Security page under the 802 11a Interface See Security on page 50 enable the radio service for any of the VAP interfaces and then set an SSID to identify the wireless network service provided by each VAP Remember that only clients with the same SSID can associate with a VAP i NOTE You must first select a country before the wireless interfaces are enabled Configuring Radio Settings To configure VAP radio settings select the Radio Settings page Figure 30 Radio Settings A 802 11a Radio Settings Before enabling the Radio O Enabled 3Com1 O Enabled 3Com2 VAP 3 C Enabled 3Com3 VARS O Enabled 3Coma Radio Status Displays if the radio is enabled or disabled for this VAP gt Stan you mu ri m set the Enabled Enabled Enabled uNtry and antenna ID selec C Enabled 64 64 64 60 60 60 60 NOTE You must first enable VAP interface 1 before you can enable other VAP interfaces SSID The name of the basic service set provided by a VAP interface Clients that want to connect to the network through the access point must set their SSID to the same as that of
158. in the text fields provided Otherwise leave the addresses as all zeros 0 0 0 0 Web Servers Allows monitoring of the access point from a browser and secure connection HTTP Server Allows the access point to be monitored or configured from a browser HTTP Port Specifies the port to be used by the web browser interface HTTPS Server Enables the secure HTTP server on the access point HTTPS Port Specifies the UDP port number used for a secure HTTP connection to the access point s Web interface 5 6 Figure 14 TCP IP Settings Smart Monitor Smart Monitor Disable The Access Point will not monitor wired network link O Enable The Access Point will actively examine the stetus of Ethernet link Host Ping Enable You can set the Target IP Address for Smart Monitor additional check 0000 o Ping Interval 5 to 60 sec 30 Number of Retries allowed 1 to 10 6 2 By enabling Smart Monitor known as Link Integrity in the CLI and setting a target IP address the AP will periodically set by the ping interval check to see if the target address responds to pings If it fails to respond to a ping after the configured number of retries it will disable both radios so that no clients can connect to the AP This is used to disable the AP when it cannot not reach a critical network element such as the RADIUS server VPN Terminator Mail Server etc Disable Enable Disables or enables a link check to a host de
159. ing Informational Command Mode Global Configuration 6 34 Using the Command Line Interface Command Usage Messages sent include the selected level down to Emergency level Level Argument Description Emergency System unusable Alert Immediate action needed Critical Critical conditions e g memory allocation or free memory error resource exhausted Error Error conditions e g invalid input default used Warning Warning conditions e g return false unexpected return Notice Normal but significant condition such as cold start Informational Informational messages only Debug Debugging messages Example Outdoor lla Building to Building config logging level alert Outdoor lla Building to Building config logging facility type This command sets the facility type for remote logging of syslog messages Syntax logging facility type lt type gt type A number that indicates the facility used by the syslog server to dispatch log messages to an appropriate service Range 16 23 Default Setting 16 Command Mode Global Configuration Command Usage The command specifies the facility type tag sent in syslog messages See RFC 3164 This type has no effect on the kind of messages reported by the access point However it may be used by the syslog server to sort messages or to store messages in the corresponding database 6 35 CHAPTER 6 COMMAND LINE INTERFACE Example Outdoor lla Building to Building
160. ing command This guide describes the negation effect for all applicable commands Using Command History The CLI maintains a history of commands that have been entered You can scroll back through the history of commands by pressing the up arrow key Any command displayed in the history list can be executed again or first modified and then executed Using the show history command displays a longer list of recently executed commands Understanding Command Modes The command set is divided into Exec and Configuration classes Exec commands generally display information on system status or clear statistical counters Configuration commands on the other hand modify interface parameters or enable certain functions These classes are further divided into different modes Available commands depend on the selected mode You can always enter a question mark at the prompt to display a list of the commands available for the current mode The command classes and associated modes are displayed in the following table Table 7 Command Modes Class Mode Exec Privileged Configuration Global Interface ethernet Interface wireless Interface wireless vap Exec Commands l When you open a new console session on an access point the system enters Exec command mode Only a limited number of the commands are available in this mode You can access all other commands only from the configuration mode To access Exec mode open a new console sessi
161. ink between two sites that can be up to 15 4 km 9 6 miles apart As a Master bridge in point to multipoint configurations it can support connections to as many as six Slave units The 802 11b g radio requires an external antenna option The unit is housed in a weatherproof enclosure for mounting outdoors and includes its own bracket for attaching to a wall pole radio mast or tower structure The unit is powered through its Ethernet cable connection from a power injector module that is installed indoors The wireless bridge system offers a fast reliable and cost effective solution for connectivity between remote Ethernet wired LANs or to provide Internet access to an isolated site The system is also easy to install and operate ideal for situations where a wired link may be difficult or expensive to deploy The wireless bridge connection provides data rates of up to 108 Mbps In addition both wireless bridge models offer full network management capabilities through an easy to use web interface a command line interface and support for Simple Network Management Protocol SNMP tools PRODUCT FEATURES a Supports a 5 GHz point to point wireless link up 15 4 km at 6 Mbps data rate using the integrated high gain 17 dBi antenna a Supports 2 4 GHz or 5 GHz point to multipoint links using various external antenna options a Provides access point services for the 5 GHz and 2 4 GHz radios using various external antenna options
162. io Channel 36 ch 5180GHz Auto Channel Select Disable Enable i 802 11g Radio Radio Channel ma Auto Channel Select C Disable Enable 4 7 CHAPTER 4 INITIAL CONFIGURATION 3 Haure 8 Setup Wizard Step 3 802 11a Turbo Mode If you select Enable the access point will operate sock S300 Gre in turbo mode with a data rate of up to 108 Mbps Normal 44 ch 5 220 GHz mode support 13 channels Turbo mode supports only 5 channels Default Disabled 802 11a Radio Channel Set the operating radio channel number Default 60ch 5 300 GHz Auto Channel Select Select Enable for automatic radio channel detection Default Enabled 802 1 1b g Turbo Mode If you select Enable the access point will operate in turbo mode with a data rate of up to 108 Mbps Normal mode support 11 channels Turbo mode supports only 1 channel Default Disabled 802 119 Radio Channel Set the operating radio channel number Range 1 11 Default 1 IP Configuration Either enable or disable Dynamic Host Configuration Protocol DHCP for automatic IP configuration If you disable DHCP then manually enter the IP address and subnet mask If a management station exists on another network segment then you must enter the IP address for a gateway that can route traffic between these segments Then enter the IP address for the primary and secondary Domain Name Servers DNS servers to be used for host name to IP address res
163. is now closed Username ping This command sends ICMP echo request packets to another node on the network Syntax ping lt host_name ip_address gt e host_name Alias of the host e jp_address IP address of the host Default Setting None Command Mode Exec Command Usage e Use the ping command to see if another site on the network can be reached e The following are some results of the ping command Normal response The normal response occurs in one to ten seconds depending on network traffic Destination does not respond If the host does not respond a timeout appears in ten seconds Using the Command Line Interface Destination unreachable The gateway for this destination indicates that the destination is unreachable Network or host unreachable The gateway found no corresponding entry in the route table e Press lt Esc gt to stop pinging Example Outdoor lla Building to Building ping 10 1 0 19 192 254 2 19 is alive Outdoor lla Building to Building reset This command restarts the system or restores the factory default settings Syntax reset lt board configuration gt e board Reboots the system e configuration Resets the configuration settings to the factory defaults and then reboots the system Default Setting None Command Mode Exec Command Usage When the system is restarted it will always run the Power On Self Test Example This example shows how to reset the system
164. ission Control No TXOP Limit 3 008 ms AC3 Voice logCwMin 2 logCwMax 3 AIFSN 1 Admission Control No TXOP Limit 1 504 ms Outdoor lla Building to Building 6 132 Using the Command Line Interface show station This command shows the wireless clients associated with the access point Command Mode Exec Example Outdoor lla Building to Building show station Station Table Information if wireless A VAP 0 802 lla Channel 60 No 802 11la Channel Stations if wireless G VAP 0 802 11g Channel 1 802 11g Channel Station Table Station Address 00 04 23 94 9A 9C VLAN ID 0 Authenticated Associated Forwarding KeyType TRUE FALSE FALSE NONE Counters pkts Tx Rx bytes Tx Rx 20 0 721 0 Time Associated lLastAssoc LastDisAssoc LastAuth 0 0 0 0 if wireless G VAP 1 802 11g Channel 1 No 802 11g Channel Stations Outdoor lla Building to Building Rogue AP Detection Commands A rogue AP is either an access point that is not authorized to participate in the wireless network or an access point that does not have the correct security configuration Rogue APs can potentially allow unauthorized users access to the network Alternatively client stations may mistakenly associate to a rogue AP and be prevented from accessing network resources Rogue APs may also cause radio interference and degrade the wireless LAN performance 6 133 CHAPTER 6 COMMAND LINE INTERFACE The access point can be
165. istration a Telnet Server Status Enables or disables the Telnet server Default Enabled a SSH Server Status Enables or disables the SSH server Default Enabled a SSH Server Port Sets the UDP port for the SSH server Range 1 65535 Default 22 UPGRADING FIRMWARE You can upgrade new access point software from a local file on the management workstation or from an TFP server New software may be provided periodically from your distributor After upgrading new software you must reboot the access point to implement the new code Until a reboot occurs the access point will continue to run the software it was using before the upgrade started Also note that new software that is incompatible with the current configuration automatically restores the access point to the factory default settings when first activated after a reboot CHAPTER 5 SYSTEM CONFIGURATION Figure 24 Firmware Upgrade SYSTEM e Identification e TCPAP Settings e RADUS e Authentication Fitter Control e SNMP Administration WOSISTP Settings e Syslog Set up RSSI Status 802 1ta Interface ORP OWE ae age Tye Stand sione OManaged 802 1 1b g interface Radio Settings a Security It may take several minutes to upgrade the firmware pease wait Backup and Restore Configuration Enter the TFTP Server IP Address and the filename Then click Backup Configuration or Restore Configuration DOO Before upgradin
166. ity 6 146 Using the Command Line Interface The MIC calculation is performed in the access point for each transmitted packet and this can impact throughput and performance The access point supports a choice of hardware or software for MIC calculation The performance of the access point can be improved by selecting the best method for the specific deployment Using the hardware option provides best performance when the number of supported clients is less than 27 Using the software option provides the best performance for a large number of clients on one radio interface Throughput may be reduced when both 802 11a and 802 11g interfaces are supporting a high number of clients simultaneously Example Outdoor lla Building to Building if wireless a mic_mode hardware Outdoor 1la Building to Building if wireless g wpa pre shared key This command defines a Wi Fi Protected Access WPA WPAZ2 Pre shared key Syntax Wpa pre shared key lt hex passphrase key gt lt va ue gt e hex Specifies hexadecimal digits as the key input format e passphrase key Specifies an ASCII pass phrase string as the key input format e value The key string For ASCII input specify a string between 8 and 63 characters For HEX input specify exactly 64 digits Command Mode Interface Configuration Wireless VAP Command Usage e To support WPA or WPA2 for client authentication use the auth command to specify the authentication t
167. key lt index gt index Key index Range 1 4 Default Setting 1 Command Mode Interface Configuration Wireless VAP Command Usage e f you use WEP key encryption option the access point uses the transmit key to encrypt multicast and broadcast data signals that it sends to client devices Other keys can be used for decryption of data from clients e When using IEEE 802 1X the access point uses a dynamic key to encrypt unicast and broadcast messages to 802 1X enabled clients However because the access point sends the keys during the 802 1X authentication process these keys do not have to appear in the client s key list 6 144 Using the Command Line Interface e In a mixed mode environment with clients using static and dynamic keys select transmit key index 2 3 or 4 The access point uses transmit key index 1 for the generation of dynamic keys Example Outdoor lla Building to Building if wireless g VAP 0 transmit key 2 Outdoor lla Building to Building if wireless g cipher suite This command defines the cipher algorithm used to encrypt the global key for broadcast and multicast traffic when using Wi Fi Protected Access WPA security Syntax cipher suite lt aes ccmp tkip wep gt e aes ccmp Use AES CCMP encryption for the unicast and multicast cipher e tkip Use TKIP encryption for the multicast cipher TKIP or AES CCMP can be used for the unicast cipher depending on the capability of the client e
168. l mode the access point provides a channel bandwidth of 20 MHz and supports the maximum number of channels permitted by local regulations e g 11 channels for the United States In Turbo Mode the channel bandwidth is increased to 40 MHz to support the increased data 6 114 Using the Command Line Interface rate However this reduces the number of channels supported e g 5 channels for the United States Example Outdoor lla Building to Building if wireless a turbo Outdoor lla Building to Building if wireless a multicast data rate This command configures the maximum data rate at which the access point transmits multicast and management packets excluding beacon packets on the wireless interface Syntax multicast data rate lt speed gt speed Maximum transmit speed allowed for multicast data Options for 802 11a 6 12 24 Mbps Options for 802 11b g 1 2 5 5 11 Mbps Default Setting 1 Mbps for 802 11b g 6 Mbps for 802 11a Command Mode Interface Configuration Wireless Example Outdoor lla Building to Building if wireless g multicast data rate 5 5 Outdoor 1la Building to Building if wireless g 6 115 CHAPTER 6 COMMAND LINE INTERFACE channel This command configures the radio channel through which the access point communicates with wireless clients Syntax channel lt channe auto gt e channel Manually sets the radio channel used for communications with wireless clients Rang
169. lding if wireless a wmmparam This command configures detailed WMM parameters that apply to the access point AP or the wireless clients BSS Syntax wmmparam lt AP BSS gt lt ac_number gt lt LogCwMin gt lt LogCwMax gt lt AIFS gt lt TxOpLimit gt lt admission_control gt AP Access Point BSS Wireless client ac_number Access categories ACs voice video best effort and background These categories correspond to traffic priority levels and are mapped to IEEE 802 1D priority tags as shown in Table Range 0 3 LogCwMin Minimum log value of the contention window This is the initial upper limit of the random backoff wait time before wireless medium access can be attempted The initial wait time is a random value between zero and the LogCwMin value Specify the LogCwMin value Note that the LogCwMin value must be equal or less than the LogCwMax value Range 1 15 microseconds LogCwMax Maximum log value of the contention window This is the maximum upper limit of the random backoff wait time before wireless medium access can be attempted The contention window is doubled after each detected collision up to the LogCwMax value Note that the CWMax value must be greater or equal to the LogCwMin value Range 1 15 microseconds AIFS Arbitrary InterFrame Space specifies the minimum amount of wait time before the next data transmission attempt Range 1 15 microseconds TXOPLimit Transmission Opportunit
170. lding to Building 6 96 VianID origin life remain Life 4095 4095 4095 300 300 300 300 300 300 300 300 300 300 175 300 300 Type Using the Command Line Interface show bridge link This command displays WDS bridge link and spanning tree settings for specified interfaces Syntax show bridge link lt ethernet wireless lt a g gt index gt e ethernet Specifies the Ethernet interface e wireless Specifies a wireless interface a The 802 1 1a radio interface g The 802 119 radio interface index The index number of a bridge link Range 1 6 CHAPTER 6 COMMAND LINE INTERFACE Command Mode Exec Example Outdoor lla Building to Building show bridge link wireless a Interface Wireless A WDS Information AP Role Bridge Parent 00 12 34 56 78 9a Child Child 2 00 08 12 34 56 de Child 3 00 00 00 00 00 00 Child 4 00 00 00 00 00 00 Child 5 00 00 00 00 00 00 Child 6 00 00 00 00 00 00 STAs No WDS Stations Outdoor lla Building to Building Outdoor lla Building to Building show bridge link wireless a 2 Port No So status Enabled state Disabled priority p path cost 19 message age Timer Inactive message age 4469 designated root priority 32768 MAC 00 30 F1 F0 9A 9C designated cost ana 6 designated bridge priority 32768 MAC 00 30 F1 F0 9A 9C designated port priority 0 port No 11 forward transitions 0
171. lects an encryption method for the global key used for multicast and broadcast traffic which is supported by all wireless clients a AES AES CCMP is used as the multicast encryption cipher AES CCMP is the standard encryption cipher required for WPA2 a TKIP TKIP is used as the multicast encryption cipher WEP TKIP WEP is used as the multicast encryption cipher You should select WEP only when both WPA and WEP clients are supported Figure 36 WPA Key Management WEP Configuration The WEP Key settings below will apply to all virtual AP 1 4 Key Size 648i O 128Bit O 152 Bit Key Type Hexadecimal Enter 10 26 or 32 hex digits Alphanumeric Enter 5 13 or 16 characters 00080 2 WPA Key Management Specifies the type of WPA encryption to use a WPA authentication over 802 1x Requires the use of 802 1x authentication a WPA Pre shared Key PSK Requires that 802 1x authentication be disabled Key Type Select the preferred method of entering WEP encryption keys on the access point and enter up to four keys 5 55 CHAPTER 5 SYSTEM CONFIGURATION a Hexadecimal Enter keys as 10 hexadecimal digits 0 9 and A F for 64 bit keys 26 hexadecimal digits for 128 bit keys or 32 hexadecimal digits for 152 bit keys 802 114 radio only This is the default setting a Alphanumeric Enter keys as 5 alphanumeric characters for 64 bit keys 13 alphanumeric characters for 128 bit keys or 16 alohanumeric char
172. lients can use encryption to protect from interception and evesdropping Extended Service Set ESS More than one wireless cell can be configured with the same Service Set Identifier to allow mobile users can roam between different cells with the Extended Service Set Extensible Authentication Protocol EAP An authentication protocol used to authenticate network clients EAP is combined with IEEE 802 1X port authentication and a RADIUS authentication server to provide mutual authentication between a client the access point and the a RADIUS server Ethernet A popular local area data communications network which accepts transmission from computers and terminals File Transfer Protocol FTP A TCP IP protocol used for file transfer Hypertext Transfer Protocol HTTP HTTP is a standard used to transmit and receive all data over the World Wide Web IEEE 802 11a A wireless standard that supports high speed communications in the 5 GHz band using Orthogonal Frequency Division Multiplexing OFDM The standard supports data rates of 6 12 24 and 54 Mbps Glossary 2 IEEE 802 11b A wireless standard that supports wireless communications in the 2 4 GHz band using Direct Sequence Spread Spectrum DSSS The standard provides for data rates of 1 2 5 5 and 11 Mbps IEEE 802 11g A wireless standard that supports wireless communications in the 2 4 GHz band using using Orthogonal Frequency Division Multiplexing OFDM The
173. lities 3Com Wireless Infrastructure Device Manager an administration tool that helps you select 3Com wireless LAN devices and launch their configurations in your Web browser LAUNCH THE 3COM WIRELESS INFRASTRUCTURE DEVICE MANAGER WIDMAN UTILITY 1 Turn on the computer 2 Insert the 3Com Installation CD into the CD ROM drive The CD will Autorun If it does not Autorun you can start the setup menu from the Windows Start menu For example Start gt Run gt d setup exe 3 Inthe menu click Tools and Utilities 4 Inthe next screen click the software you want to install 5 Follow the on screen instructions to complete the installation Reboot the computer if prompted to do so LAUNCHING THE 3COM WIRELESS INTERFACE DEVICE MANAGER To be able to configure the Access Point you need to run the Wireless Interface Device Manager Go to Start gt Programs gt 3Com Wireless gt Wireless Interface Device Manager If the device is working correctly the following screen should be seen 4 2 Figure 1 Wireless Interface Device Manager 3Com Wireless Infrastructure Device Manager AA Wireless Network Click on the Properties button to see the following screen Figure 2 Wireless Interface Device Manager Properties Wireless Infrastructure Device Properties Propertie Vaues O00 O Device Name Enterprise Wireless AP j Device Type _ 3Com Wireless 8760 Dual Radio 11a b g PoE Acc WLAN Service Area ESSID 3Com1 3Com5
174. ll TKIP is a replacement for WEP that removes the predictability that intruders relied on to determine the WEP key AES CCMP Advanced Encryption Standard Counter Mode CBCMAC Protocol WPA2 is backward compatible with WPA including the same 802 1X and PSK modes of operation and support for TKIP encryption The main enhancement is its use of AES Counter Mode encryption with Cipher Block Chaining Message Authentication Code CBC MAC for message integrity The AES Counter Mode CBCMAC Protocol AES CCMP provides extremely robust data confidentiality using a 128 bit key The AES CCMP encryption cipher is specified as a standard requirement for WPA2 However the computational intensive operations of AES CCMP requires hardware support on client devices Therefore to implement WPA2 in the network wireless clients must be upgraded to WPA2 compliant hardware Example Outdoor lla Building to Building if wireless g VAP 0 cipher suite TKIP Outdoor lla Building to Building if wireless g mic_mode This command specifies how to calculate the Message Integrity Check MIC Syntax mic_mode lt hardware software gt e hardware Uses hardware to calculate the MIC e software Uses software to calculate the MIC Default Setting software Command Mode Interface Configuration Wireless Command Usage e The Michael Integrity Check MIC is part of the Temporal Key Integrity Protocol TKIP encryption used in Wi Fi Protected Access WPA secur
175. lly authenticated with 802 1X are allowed to access the network NOTE If 802 1X is enabled on the access point then RADIUS setup must be completed See RADIUS on page 8 When 802 1X is enabled the broadcast and session key rotation intervals can also be configured a Broadcast Key Refresh Rate Sets the interval at which the broadcast keys are refreshed for stations using 802 1X dynamic keying Range 0 1440 minutes Default 0 means disabled CHAPTER 5 SYSTEM CONFIGURATION Session Key Refresh Rate The interval at which the access point refreshes unicast session keys for associated clients Range 0 1440 minutes Default 0 means disabled 802 1X Reauthentication Refresh Rate The time period after which a connected client must be re authenticated During the re authentication process of verifying the client s credentials on the RADIUS server the client remains connected the network Only if re authentication fails is network access blocked Range 0 65535 seconds Default 0 means disabled 802 1X Supplicant The access point can also operate in a 802 1X supplicant mode This enables the access point itself to be authenticated with a RADIUS server using a configured MD5 user name and password This prevents rogue access points from gaining access to the network Local MAC Authentication Configures the local MAC authentication database The MAC database provides a mechanism to take certain actions based on a wir
176. mation for planning your wireless bridge links NOTE The planning and installation of the wireless bridge requires professional personne that are trained in the installation of radio transmitting equipment The user is responsible for compliance with local regulations concerning items such as antenna power use of lightning arrestors grounding and radio mast or tower construction Therefore it is recommended to consult a professional contractor knowledgeable in local radio regulations prior to equipment installation 2 1 DATA RATES Using the 5 0 GHz integrated antenna two WL 575 bridges can operate over a range of up to 15 4 km 9 6 miles or provide a high speed connection of 54 Mbps 108 Mbps in turbo mode However the maximum data rate for a link decreases as the operating range increases A 15 4 km link can only operate up to 6 Mbps whereas a 108 Mbps connection is limited to a range of 1 3 km When you are planning each wireless bridge link take into account the maximum distance and data rates for the various antenna options A summary for 5 0 GHz 802 11a antennas is provided in the following table Distances Achieved Using 17 dBi Integrated Antennas Data Rate Distance 6 Mbps 15 4 km 9 Mbps 14 7 km 12 Mbps 14 km 18 Mbps 12 8 km 24 Mbps 11 1 36 Mbps 6 5 km 48 Mbps 2 9 km 54 Mbps 1 8 km 12 Mbps Turbo 13 4km 18 Mbps Turbo 12 8 km 24 Mbps Turbo 12 2 km 36 Mbps Turbo 11 1 km 48 Mbps Turbo 8 2 km 72 Mbps T
177. miles 3 2 km 12 7 ft 3 9 m 0 12 7 ft 3 9 m 3 miles 4 8 km 15 6 ft 4 8 m 1 8 ft 0 5 m 17 4 ft 5 3 m 4 miles 6 4 km 18 ft 5 5 m 3 2 ft 1 0 m 21 2 ft 6 5 m 5 miles 8 km 20 ft 6 1 m 5 ft 1 5 m 25 ft 7 6 m 7 miles 11 3 km 24 ft 7 3 m 9 8 ft 3 0 m 33 8 ft 10 3 m 9 miles 14 5 km 27 ft 8 2 m 16 ft 4 9 m 43 ft 13 1 m 12 miles 19 3 km 31 ft 9 5 m 29 ft 8 8 m 60 ft 18 3 m 15 miles 24 1 km 35 ft 10 7 m 45 ft 13 7 m 80 ft 24 4 m 17 miles 27 4 km 37 ft 11 3 m 58 ft 17 7 m 95 ft 29 m Note that to avoid any obstruction along the path the height of the object must be added to the minimum clearance required for a clear radio line of sight Consider the following simple example illustrated in the figure below Visual Line of Sight Radio Line of Sight 3 miles 4 8 km 20m A wireless bridge link is deployed to connect building A to a building B which is located three miles 4 8 km away Mid way between the two buildings is a small tree covered hill From the above table it can be seen that for a three mile link the object clearance required at the mid point is 5 3 m 17 4 ft The tree tops on the hill are at an elevation of 17 m 56 ft so the antennas at each end of the link need to be at least 22 3 m 73 ft high Building A is six stories high or 20 m 66 ft so a 2 3 m 7 5 ft mast or pole must be constructed on its roof to achieve the required antenna h
178. mith Minimum Abbreviation The CLI will accept a minimum number of characters that uniquely identify a command For example the command configure can be entered as con If an entry is ambiguous the system will prompt for further input Command Completion If you terminate input with a Tab key the CLI will print the remaining characters of a partial keyword up to the point of ambiguity In the configure example typing con followed by a tab will result in printing the command up to configure Getting Help on Commands You can display a brief description of the help system by entering the help command You can also display command syntax by following a command with the character to list keywords or parameters 6 3 CHAPTER 6 COMMAND LINE INTERFACE Showing Commands If you enter a at the command prompt the system will display the first level of keywords for the current configuration mode Exec Global Configuration or Interface You can also display a list of valid keywords for a specific command For example the command show displays a list of possible show commands Outdoor lla Building to Building show APmanagement Show management AP information authentication Show Authentication parameters bootfile Show bootfile name bridge Show bridge config System snapshot for tech support dhcp relay Show DHCP Relay Configuration event log Show event log on console filters Show filters ha
179. mmand Mode Exec Example Outdoor lla Building to Building show snmp groups GroupName RO SecurityModel USM SecurityLevel NoAuthNoPriv GroupName RWAuth SecurityModel USM SecurityLevel AuthNoPriv GroupName RWPriv SecurityModel USM SecurityLevel AuthPriv Outdoor lla Building to Building show snmp users This command displays the SNMP v3 users and settings Syntax show snmp users Command Mode Exec Example Outdoor lla Building to Building show snmp users UserName chris GroupName RWPriv AuthType MD5 PAaSSPALASE KEEKEEKE RAK PrivType DES Passphrase 14444 Xk RRARERAK KK Outdoor lla Building to Building show snmp group assignments This command displays the SNMP v3 user group assignments 6 57 CHAPTER 6 COMMAND LINE INTERFACE Syntax show snmp group assignments Command Mode Exec Example Outdoor lla Building to Building show snmp group assignments GroupName RWPriv UserName chris Outdoor lla Building to Building Outdoor lla Building to Building show snmp target This command displays the SNMP v3 notification target settings Syntax show snmp target Command Mode Exec Example Outdoor lla Building to Building show snmp target Host ID mytraps User 2 Chews IP Address R SLO 2 254 27533 UDP Port 162 Outdoor lla Building to Building show snmp filter This command displays the SNMP v3 notification filter settings Syntax show snmp filter fi ter ic e f
180. mples shown later in this chapter abbreviate the console prompt to AP for simplicity 6 1 CHAPTER 6 COMMAND LINE INTERFACE Telnet Connection Telnet operates over the IP transport protocol In this environment your management station and any network device you want to manage over the network must have a valid IP address Valid IP addresses consist of four numbers 0 to 255 separated by periods Each address consists of a network portion and host portion For example if the access point cannot acquire an IP address from a DHCP server the default IP address used by the access point 168 254 2 1 consists of a network portion 168 254 2 and a host portion 1 To access the access point through a Telnet session you must first set the IP address for the access point and set the default gateway if you are managing the access point from a different IP subnet For example Outdoor lla Building to Building configure Outdoor lla Building to Building config interface ethernet Outdoor lla Building to Building if ethernet ip address 10 1 0 1 255 255 255 0 10 170 254 Outdoor lla Building to Building if ethernet If your corporate network is connected to another network outside your office or to the Internet you need to apply for a registered IP address However if you are attached to an isolated network then you can use any IP address that matches the network segment to which you are attached After you configure the
181. n identification Change Password TCPIIP Settings Radius Authentication Filter Control e SNMP Username The name of the user The default name is admin Length 3 16 characters case sensitive New Password The password for management access Length 3 16 characters case sensitive Confirm New Password Enter the password again for verification TELNET AND SSH SETTINGS Telnet is a remote management tool that can be used to configure the access point from anywhere in the network However Telnet is not secure from hostile attacks The Secure Shell SSH can act as a secure replacement for Telnet The SSH protocol uses generated public keys to encrypt all data transfers passing between the access point and SSH enabled management station clients and ensures that data traveling over the network arrives unaltered Clients can then securely use the local user name and password for access authentication Note that SSH client software needs to be installed on the management station to access the access point for management via the SSH protocol i NOTE The access point supports only SSH version 2 0 NOTE After boot up the SSH server needs about two minutes to generate host i encryption keys The SSH server is disabled while the keys are being generated Figure 23 Telnet and SSH Settings Administration Telnet amp SSH Settings Disable Enable Disable Enable s Admin
182. n JO Poland PL Venezuela VE Cyprus CY Kazakhstan KZ Portugal PT Vietnam VN 6 14 Using the Command Line Interface Country Code Country Code Country Code Country Code Czech Republic CZ North Korea KP Puerto Rico PR Zimbabwe ZW Denmark DK Korea KR Slovenia SI Republic Elsalvador SV Luxembourg LU South Africa ZA Default Setting US for units sold in the United States 99 no country set for units sold in other countries Command Mode Exec Command Usage e If you purchased an access point outside of the United States the country code must be set before radio functions are enabled e The available Country Code settings can be displayed by using the country command Example Outdoor lla Building to Building country tw Outdoor lla Building to Building prompt This command customizes the CLI prompt Use the no form to restore the default prompt Syntax prompt lt string gt no prompt string Any alphanumeric string to use for the CLI prompt Maximum length 32 characters CHAPTER 6 COMMAND LINE INTERFACE Default Setting Outdoor 11a Building to Building Command Mode Global Configuration Example Outdoor lla Building to Building config prompt RD2 RD2 config system name This command specifies or modifies the system name for this device Use the no form to restore the default system name Syntax system name lt name gt no system name name The name of this host Maximum length 32 characte
183. n successfully associate with the access point Use the wpa preshared key command to configure the key see key on page 143 and transmit key on page 144 WPA2 defines a transitional mode of operation for networks moving from WPA security to WPA2 WPA2 Mixed Mode allows both WPA and WPA2 clients to associate to a common VAP interface When the encryption cipher suite is set to TKIP the unicast encryption cipher TKIP or AES CCMP is negotiated for each client The access point advertises it s supported encryption ciphers in beacon frames and probe responses WPA and WPA2 clients select the cipher they support and return the choice in the association request to the access point For mixed mode operation the cipher used for broadcast frames is always TKIP WEP encryption is not allowed The required option places the VAP into TKIP only mode The supported option places the VAP into TKIP AES WEP mode The required mode is used in WPA only environments The supported mode can be used for mixed environments with legacy WPA products specifically WEP For example WPA WEP The WPA2 WEP environment is not available because WPA2 does not support 6 141 CHAPTER 6 COMMAND LINE INTERFACE WEP To place the VAP into AES only mode use required and then select the cipher ccmp option for the cipher suite command Example Outdoor lla Building to Building if wireless g VAP 0 auth shared key Outdoor
184. n when its Ethernet port is connected to the power injector module and the power injector module is connected to an AC power source The power injector includes one LED indicator that turns on when AC power is applied The power injector module automatically adjusts to any AC voltage between 100 240 volts at 50 or 60 Hz No voltage range settings are required WARNING The power injector module is designed for indoor use only Never mount the power injector outside with the wireless bridge unit GROUNDING POINT Even though the wireless bridge includes its own built in lightning protection it is important that the unit is properly connected to ground A grounding screw is provided for attaching a ground wire to the unit WATER TIGHT TEST POINT CAUTION Do not remove or loosen this screw Doing so could lead to damage of the unit WALL AND POLE MOUNTING BRACKET KIT The wireless bridge includes a bracket kit that can be used to mount the bridge to a wall pole radio mast or part of a tower structure SYSTEM CONFIGURATION At each location where a unit is installed it must be connected to the local network using the power injector module The following figure illustrates the system component connections External Antenna RF Coaxial Cable Indoor Outdoor LAN Switch Wireless Bridge Unit Ethernet Cable Ethernet Cable AC Power Lightning Arrestor Ground Wire
185. nal must be sent to the receiving station prior to the sending station starting communications Syntax rts threshold lt threshold gt threshold Threshold packet size for which to send an RTS Range 0 2347 bytes 6 123 CHAPTER 6 COMMAND LINE INTERFACE Default Setting 2347 Command Mode Interface Configuration Wireless Command Usage e If the threshold is set to O the access point always sends RTS signals If set to 2347 the access point never sends RTS signals If set to any other value and the packet size equals or exceeds the RTS threshold the RTS CTS Request to Send Clear to Send mechanism will be enabled e The access point sends RTS frames to a receiving station to negotiate the sending of a data frame After receiving an RTS frame the station sends a CTS frame to notify the sending station that it can start sending data e Access points contending for the wireless medium may not be aware of each other The RTS CTS mechanism can solve this Hidden Node problem Example Outdoor lla Building to Building if wireless g rts threshold 256 Outdoor lla Building to Building if wireless g super a This command enables Atheros proprietary Super A performance enhancements Use the no form to disable this function Syntax no super a Default Setting Disabled Command Mode Interface Configuration Wireless 802 11a Command Usage Super A enhancements include bursting compression and fast frames M
186. nd frame to notify the sending station that it can start sending data If the RTS threshold is set to 0 the access point always sends RTS signals If set to 2347 the access point never sends RTS signals If set to any other value and the packet size equals or exceeds the RTS threshold the RTS CTS Request to Send Clear to Send mechanism will be enabled The access points contending for the medium may not be aware of each other The RTS CTS mechanism can solve this Hidden Node Problem Range 0 2347 bytes Default 2347 bytes 802 11B G INTERFACE The IEEE 802 11g standard operates within the 2 4 GHz band at up to 54 Mbps Also note that because the IEEE 802 119 standard is an extension of the IEEE 802 11b standard it allows clients with 802 11b wireless network cards to associate to an 802 119 access point First configure the radio settings that apply to the individual VAPs Virtual Access Point and the common radio settings that apply to all of the 802 1 1g interfaces After you have configured the radio settings enable the radio service for any of the VAP interfaces and then set an SSID to identify the wireless network service provided by each VAP Remember that only clients with the same SSID can associate with a VAP NOTE You must first select a country of operation before interfaces can be enabled Most of the 802 11g commands are identical to those used by the 802 11a interface For information on the these comman
187. nd allows the acknowledgement wait time to be enabled or disabled for each Access Category AC Syntax wmm acknowledge policy lt ac_number gt lt ack noack gt e ac_number Access categories Range 0 3 e ack Require the sender to wait for an acknowledgement from the receiver e noack Does not require the sender to wait for an acknowledgement from the receiver Default ack Command Mode Interface Configuration Wireless Command Usage e WMM defines four access categories ACs voice video best effort and background These categories correspond to traffic priority levels and are mapped to IEEE 802 1D priority tags see Table The direct mapping of the four ACs to 802 1D priorities is specifically intended to facilitate interpretability with other wired network QoS policies While the four ACs are specified for specific types of traffic WMM allows the priority levels to be configured to match any network wide QoS policy WMM also specifies a protocol that access points can use to communicate the configured traffic priority levels to QoS enabled wireless clients Although turning off the requirement for the sender to wait for an acknowledgement can increases data throughput it can also result in a high number of errors when traffic levels are heavy 6 159 CHAPTER 6 COMMAND LINE INTERFACE Example Outdoor lla Building to Building if wireless a wmm acknowledge policy 0 noack Outdoor lla Building to Bui
188. ne Ctrl N Enters the next command line in the history buffer Ctrl P Shows the last command Ctrl R Repeats current command line on a new line Ctrl U Deletes the entire line Ctrl W Deletes the last word typed Esc B Moves the cursor backward one word Esc D Deletes from the cursor to the end of the word Esc F Moves the cursor forward one word Delete key or Erases a mistake when entering a command backspace key COMMAND GROUPS The system commands can be broken down into the functional groups shown below Table 9 Command Groups Command Group Description Page General Basic commands for entering configuration mode restarting the 6 8 system or quitting the CLI System Management Controls user name password web browser management options and 6 13 a variety of other system information System Logging Configures system logging parameters 6 32 System Clock Configures SNTP and system clock settings 6 37 DHCP Relay Configures the access point to send DHCP requests from clients to 6 42 specified servers SNMP Configures community access strings and trap managers 6 44 Flash File Manages code image or access point configuration files 6 61 RADIUS Configures the RADIUS client used with 802 1X authentication 6 65 802 1X Authentication Configures 802 1X authentication 6 71 MAC Address Configures MAC address authentication 6 78 Authentication Filtering Filters communications between wireless clients controls access to the 6 8
189. ng for the SNMP user 32 characters maximum group name The name of the SNMP group to which the user is assigned 32 characters maximum There are three pre defined groups RO RWAuth or RWPriv auth proto The authentication type used for user authentication md5 or none auth passphrase The user password required when authentication is used 8 32 characters priv proto The encryption type used for SNMP data encryption des or none priv passphrase The user password required when data encryption is used 8 32 characters Users must be assigned to groups that have the same security levels If a user who has AuthPriv security uses authentication and encryption is assigned to a read only RO group the user will not be able to access the database An AuthPriv user must be assigned to the RWPriv group with the AuthPriv security level e To configure a user for the RWAuth group you must include the auth proto and auth passphrase keywords e To configure a user for the RWPriv group you must include the auth proto auth passphrase priv proto and priv passphrase keywords Example Outdoor lla Building to Building config snmp server user User Name lt 1 32 gt chris Group Name lt 1 32 gt RWPriv Authtype md5 lt cr gt none md5 Passphrase lt 8 32 gt a good secret Privacy des lt cr gt none des Passphrase lt 8 32 gt a very good secret Outdoor lla Building to Building config snmp ser
190. nly authorized for the channels approved by each country For proper installation select your country from the country selection list To conform to FCC and other country restrictions your product may be limited in the channels that are available If other channels are permitted in your country please visit the 3Com website for the latest software version PACKAGE CHECKLIST The 3Com Outdoor 11a Building to Building Bridge and 11bg Access Point package includes One 3Com Outdoor 11a Building to Building Bridge and 11bg Access Point Mounting bracket and hardware One Weatherproof Category 5 network cable One Weatherproof Console to RS232 cable PoE power injector Ethernet connector and AC power cord One grounding screw not attached One Quick Start Guide One CD ROM containing the Setup Wizard software and User s Manual One Warranty Flyer Optional One N type RF coaxial cable Inform your dealer if there are any incorrect missing or damaged parts If possible retain the carton including the original packing materials Use them again to repack the product in case there is a need to return it HARDWARE DESCRIPTION Bottom R A RA Water Tight Test Point amp e DO NOT REMOVE Console Port Cap Attachment Console Port with Ethernet PoE Grounding Protective Cap Connector Point Integrated Antenna Top View N Type External Antenna N Type External Antenna Connector 2 4 GHz Connector 5 GHz INTEGRATED HIGH GA
191. nsider these factors e Avoid any partial line of sight between the antennas e Be cautious of trees or other foliage that may be near the path or may grow and obstruct the path 2 3 e Be sure there is enough clearance from buildings and that no building construction may eventually block the path e Check the topology of the land between the antennas using topographical maps aerial photos or even satellite image data software packages are available that may include this information for your area e Avoid a path that may incur temporary blockage due to the movement of cars trains or aircraft ANTENNA HEIGHT A reliable wireless link is usually best achieved by mounting the antennas at each end high enough for a clear radio line of sight between them The minimum height required depends on the distance of the link obstacles that may be in the path topology of the terrain and the curvature of the earth for links over 3 miles For long distance links a mast or pole may need to be constructed to attain the minimum required height Use the following table to estimate the required minimum clearance above the ground or path obstruction for 5 0 GHz bridge links Max Clearance Approximate Total Clearance Distance Fresnel Zone at Clearance for Midpoint of 5 8 GHz Link 0 25 mile 402 m 4 5 ft 1 4 m 0 4 5 ft 1 4 m 0 5 mile 805 m 6 4 ft 1 95 m 0 6 4 ft 1 95 m 1 mile 1 6 km 9 ft 2 7 m 0 9 ft 2 7 m 2
192. nt but 802 11g clients can only transfer data at 802 11b standard rates up to 11 Mbps a 802 11g only Only 802 11g clients can communicate with the access point up to 54 Mbps Turbo Mode The normal 802 11g wireless operation mode provides connections up to 54 Mbps Turbo Mode is an enhanced proprietary mode Atheros 802 11g Turbo that provides a higher data rate of up to 108 Mbps Enabling Turbo mode allows the access point to provide connections up to 108 Mbps to Atheros compatible clients NOTE In normal mode the access point supports the maximum number of channels permitted by local regulations e g 11 channels for the United States In Turbo mode channel bonding is used to provide the increased data rate However this reduces the number of channels available to one Channel 6 5 44 Radio Interface Super Mode The Atheros proprietary Super G performance enhancements are supported by the access point These enhancements include bursting compression fast frames and dynamic turbo Maximum throughput ranges between 40 to 60 Mbps for connections to Atheros compatible clients Default Disabled Radio Channel The radio channel that the access point uses to communicate with wireless clients When multiple access points are deployed in the same area set the channel on neighboring access points at least five channels apart to avoid interference with each other For example in the United States you can deploy up to
193. nts are allowed or are rogues If you enable authentication you should also configure a RADIUS server for this access point see RADIUS on page 8 Example Outdoor lla Building to Building if wireless g rogue ap authenticate Outdoor lla Building to Building if wireless g rogue ap duration This command sets the scan duration for detecting access points Syntax rogue ap duration lt milliseconds gt milliseconds The duration of the scan Range 100 1000 milliseconds Default Setting 350 milliseconds Command Mode Interface Configuration Wireless Command Usage e During a scan client access may be disrupted and new clients may not be able to associate to the access point If clients experience severe disruption reduce the scan duration time e A long scan duration time will detect more access points in the area but causes more disruption to client access Example Outdoor lla Building to Building if wireless g rogue ap duration 200 Outdoor 1la Building to Building if wireless g Related Commands rogue ap interval 6 136 rogue ap interval This command sets the interval at which to scan for access points 6 136 Using the Command Line Interface Syntax rogue ap interval lt minutes gt minutes The interval between consecutive scans Range 30 10080 minutes Default Setting 720 minutes Command Mode Interface Configuration Wireless Command Usage This command sets the interval at whi
194. o Acknowledge Acknowledge No Acknow ecge Acknowledge O No Acknovtedoe ACO BestEfot AC Background AC 2 Video ACS VoICo 4 4 3 2 10 10 4 3 3 0 0 u a KGaA Disab O Enable Disable O Enable Disable O Enable Disable O Enable 802 11b g Interface Radio Settings e Security WMM AP Parameters Disab Enable Disable Enable Disable O Enable Cisatie O Enable DDE WMM Sets the WMM operational mode on the access point When enabled the parameters for each AC queue will be employed on the access point and QoS capabilities are advertised to WMM enabled clients Default Support a Disable WMM is disabled a Support WMM will be used for any associated device that supports this feature Devices that do not support this feature may still associate with the access point a Required WMM must be supported on any device trying to associated with the access point Devices that do not support this feature will not be allowed to associate with the access point WMM Acknowledge Policy By default all wireless data transmissions require the sender to wait for an acknowledgement from the receiver WMM allows the acknowledgement wait time to be turned off for each Access Category AC Although this increases data throughput it can also result in a high number of errors when traffic levels are heavy Default Acknowledge WMM BSS Parameters These parameters apply to t
195. o Building config radius server vlan format This command sets the format for specifying VLAN IDs on the RADIUS server Syntax radius server vlan format lt hex ascii gt e hex Enter VLAN IDs as a hexadecimal number e ascii Enter VLAN IDs as an ASCII string Default Setting Hex Command Mode Global Configuration Example Outdoor lla Building to Building config radius server vlan format ascii Outdoor lla Building to Building config show radius This command displays the current settings for the RADIUS server 6 70 Default Setting None Command Mode Exec Example Outdoor lla Building to Building show radius Radius Server Information Key Retransmit Timeout Radius MAC format Radius VLAN format Key Retransmit Timeout Radius MAC format Radius VLAN format HEX HEX Outdoor lla Building to Building 802 1X Authentication The access point supports IEEE 802 1X access control for wireless clients This control feature prevents unauthorized access to the network by requiring an 802 1X client application to submit user credentials for authentication Client authentication is then verified by a RADIUS server using EAP Extensible Authentication Protocol before the access point grants client access to the network The 802 1X EAP packets are also used to pass dynamic unicast session keys and static broadcast keys to wireless clients 6 71 Using the Command Line Interface CHAP
196. o the network An authentication server contains a database of credentials such as users names and passwords for each wireless client that requires access to the access point Table 18 RADIUS Client Command Function Mode Page radius server address Specifies the RADIUS server GC 6 66 radius server port Sets the RADIUS server network port GC 6 66 radius server key Sets the RADIUS encryption key GC 6 67 radius server retransmit Sets the number of retries GC 6 67 radius server timeout Sets the interval between sending authentication GC 6 68 requests radius server Sets the RADIUS Accounting server network port GC 6 68 port accounting radius server Sets the interval between transmitting accounting GC 6 69 timeout interim updates to the RADIUS server radius server Sets the format for specifying MAC addresses on the GC 6 69 radius mac format RADIUS server 6 65 CHAPTER 6 COMMAND LINE INTERFACE Command Function Mode Page radius server vlan format Sets the format for specifying VLAN IDs on the GC 6 70 RADIUS server show radius Shows the current RADIUS settings Exec 6 70 radius server address This command specifies the primary and secondary RADIUS servers Syntax radius server secondary address lt host_ip_address host_name gt e secondary Secondary server e host_ip_address IP address of server e host_name Host name of server Range 1 20 characters Default Setting None Command Mode Global Configurati
197. ogonFail Enabled sntpServerFail Ena configFileVersionChanged Enabled radiusServerChanged Ena systemDown Enabled systemUp Ena 6 30 bled bled bled bled bled bled bled bled bled bled SNTP Information Service State SNTP SNTP Current Time Time Zone server 1 server 2 Daylight Saving if wireless A VAP 802 1la Channel 0 Auto Using the Command Line Interface Disabled 137 92 140 80 192 43 244 18 No 802 11la Channel Stations if wireless G VAP 0 802 11g Channel Auto No 802 11g Channel Stations Information Number Up time Serial System System System System System Country Code MAC Address IP Address Subnet Mask Default Gateway VLAN State Name Location Contact Management VLAN ID AP IAPP State DHCP Client HTTP Server HTTP Server Port HTTPS Server HTTPS Server Port Slot Status Boot Rom Version Software Version 00 14 Jan 1st 1970 5 BOGOTA EASTERN INDIANA Disabled 0 days 0 hours 16 minutes 51 seconds Enterprise Wireless AP Contact 99 NO_COUNTRY_SET 00 12 CF 05 B7 84 192 254 0 151 2594259725940 192 254 0 1 DISABLED 1 ENABLED ENABLED ENABLED 80 ENABLED 443 Dual band a g v3 0 7 v4 3 2 2 6 31 CHAPTER 6 COMMAND LINE INTERFACE SSH Server ENABLED SSH Server Port e522 Telnet Server ENABLED WEB Redirect DISABLED DHCP Relay DISABLED Version Information Version v4 3 2 2 Date Dec 20 2005 1
198. olution 64 ch 5 320 GHz 149 ch 5 745 GHz 153 ch 5 765 GHz 157 ch 5 785 GHz 161 ch 5 805 GHz __ 165 ch 5 825 GHz 4 lt 0 0NA WN m o TCP IP Settings DHCP Client C Enable The Access Point will obtain the IP Address from the DHCP Server Disable The Access Point will use the following IP setup DHCP Client With DHCP Client enabled the IP address subnet mask and default gateway can be dynamically assigned to the access point by the network DHCP server Default Disabled 4 8 Using the Setup Wizard NOTE If there is no DHCP server on your network then the access point will automatically start up with its default IP address 169 254 2 1 4 Security Set the Authentication Type to Open to allow open access without authentication or Shared to require authentication based on a shared key Enable encryption to encrypt data transmissions To configure other security features use the Advanced Setup menu as described in Chapter 4 Security 802 11a Radio Authentication Open Allow everyone to access C Shared Allow users with a correct pre shared key to access Encryption amp Disable Enable a al Authentication Type Use Open System to allow open access to all wireless clients without performing authentication or Shared Key to perform authentication based on a shared key that has been distributed to all stations Default Open Sys
199. ommand allows a child bridge to automatically find the operating channel of its parent bridge Syntax bridge channel auto sync lt enable disable gt e enable The bridge will automatically search and find the operating channel of its parent e disable The bridge must have the operating channel manually set to the operating channel of its parent bridge Default Setting Disabled Command Mode Interface Configuration Wireless Example Outdoor lla Building to Building if wireless a bridge channel auto sync enable Enable channel auto sync Outdoor 1la Building to Building if wireless a Using the Command Line Interface bridge link parent This command configures the MAC address of the parent bridge node Syntax bridge link parent lt mac address gt mac address The wireless MAC address of the parent bridge unit 12 hexadecimal digits in the form XX XX XX XX XX XX Default Setting None Command Mode Interface Configuration Wireless Command Usage Every bridge except the root bridge in the wireless bridge network must specify the MAC address of the parent bridge that is linked to the root bridge or the root bridge itself Example Outdoor lla Building to Building if wireless a bridge link parent 00 08 2d 69 3a 51 Outdoor lla Building to Building if wireless a bridge link child This command configures the MAC addresses of child bridge nodes Syntax bridge link child lt index gt lt mac
200. ommand sets the time period after which a connected client must be re authenticated Use the no form to disable 802 1X re authentication Syntax 802 1x session timeout lt seconds gt no 802 1x session timeout seconds The number of seconds Range 0 65535 CHAPTER 6 COMMAND LINE INTERFACE Default O Disabled Command Mode Global Configuration Example Outdoor lla Building to Building config 802 1x session timeout 300 Outdoor lla Building to Building config 802 1x supplicant enable This command enables the access point to operate as an 802 1X supplicant for authentication Use the no form to disable 802 1X authentication of the access point Syntax 802 1x supplicant enable no 802 1x supplicant Default Disabled Command Mode Global Configuration Command Usage A user name and password must be configured first before the 802 1X supplicant feature can be enabled Example Outdoor lla Building to Building config 802 1x supplicant enable Outdoor lla Building to Building config 802 1x supplicant user This command sets the user name and password used for authentication of the access point when operating as a 802 1X supplicant Use the no form to clear the supplicant user name and password Using the Command Line Interface Syntax 802 1x supplicant user lt username gt lt password gt no 802 1x supplicant user e username The access point name used for authentication to the network Range 1 3
201. on Example Outdoor lla Building to Building config radius server address 1925 2543225 Outdoor lla Building to Building config radius server port This command sets the RADIUS server network port Syntax radius server secondary port lt port_number gt e secondary Secondary server e port_number RADIUS server UDP port used for authentication messages Range 1024 65535 Default Setting 1812 Command Mode Global Configuration 6 66 Using the Command Line Interface Example Outdoor lla Building to Building config radius server port 181 Outdoor lla Building to Building config radius server key This command sets the RADIUS encryption key Syntax radius server secondary key lt key_string gt e secondary Secondary server e key_string Encryption key used to authenticate logon access for client Do not use blank spaces in the string Maximum length 20 characters Default Setting DEFAULT Command Mode Global Configuration Example Outdoor lla Building to Building config radius server key green Outdoor lla Building to Building config radius server retransmit This command sets the number of retries Syntax radius server secondary retransmit number_of_retries e secondary Secondary server e number_of_retries Number of times the access point will try to authenticate logon access via the RADIUS server Range 1 30 6 67 CHAPTER 6 COMMAND LINE INTERFACE Default S
202. on SSH task Set SSH server port to 22 Mar 09 TOOTJA nformation SSH task Enable SSH server Mar 09 aots aae AA nformation Enable Telnet Mar 09 55 40 nformation 802 11a 11la Radio Interface Disabled Mar 09 2 55 40 nformation 802 a Transmit Power set to QUARTER Press lt n gt next lt p gt previous lt a gt abort lt y gt continue to end Outdoor lla Building to Building configure Enter configuration commands one per line End with CTRL Z Outdoor lla Building to Building config logging clear System Clock Commands These commands are used to configure SNTP and system clock settings on the access point Table 14 System Clock Commands Command Function Mode Page sntp server ip Specifies one or more time servers GC 6 38 sntp server enable Accepts time from the specified time servers GC 6 38 sntp server date time Manually sets the system date and time GC 6 39 sntp server Sets the start and end dates for daylight savings time GC 6 40 daylight saving sntp server timezone Sets the time zone for the access point s internal clock GC 6 40 show sntp Shows current SNTP configuration settings Exec 6 41 6 37 CHAPTER 6 COMMAND LINE INTERFACE sntp server ip This command sets the IP address of the servers to which SNTP time requests are issued Use the this command with no arguments to clear all time servers from the current list Syntax sntp server ip lt 1 2 gt lt p gt e 1 First time server e 2 Second time s
203. on with the user name admin The command prompt displays as Outdoor 11a Building to Building for Exec mode Username admin Password system login password Outdoor lla Building to Building 6 5 CHAPTER 6 COMMAND LINE INTERFACE Configuration Commands Configuration commands are used to modify access point settings These commands modify the running configuration and are saved in memory The configuration commands are organized into four different modes e Global Configuration GC These commands modify the system level configuration and include commands such as username and password e Interface Ethernet Configuration IC E These commands modify the Ethernet port configuration and include command such as dns and ip e Interface Wireless Configuration IC W These commands modify the wireless port configuration of global parameters for the radio and include commands such as channel and transmit power e Interface Wireless Virtual Access Point Configuration IC W VAP These commands modify the wireless port configuration for each VAP and include commands such as ssid and authentication To enter the Global Configuration mode enter the command configure in Exec mode The system prompt will change to Outdoor 11a Building to Building config which gives you access privilege to all Global Configuration commands Outdoor lla Building to Building configure Outdoor lla Building to Building config
204. onger than the aging time the entry is discarded Example Outdoor lla Building to Building config bridge dynamic entry age time 100 Outdoor lla Building to Building config 6 93 CHAPTER 6 COMMAND LINE INTERFACE show bridge aging time This command displays the current WDS forwarding table aging time setting Using the Command Line Interface Command Mode Exec Example Outdoor lla Building to Building show bridge aging time Aging time 300 Outdoor lla Building to Building show bridge filter entry This command displays current entries in the WDS forwarding table Command Mode Exec 6 95 CHAPTER 6 COMMAND LINE INTERFACE Example Outdoor lla Building to Building show bridge filter entry max entry numbers 512 current entry nums 13 KEKKK KKK KKK KKK KKK KKK KKK KKK KKK KKK KKK KKK KKK KKK KKK KK KKK KKK KKK KKK KKK KKEKKKKKKKKKKKKKKKKKKKKK Bridge MAC Addr Table KKKKKKKKKKK KEKKK KKK KKK KKK KKK KKK KKK KKK KK KKK KKK KKK KKK KKK KKK KKK KKK KKK KKK KKK KKK MAC 01 80 c2 00 Static 01 80 c2 00 Static 00 30 f1 0 Static 00 30 f1 0 Static 00 30 f1 0 Static 00 30 f1 0 Static 00 30 f1 0 Static 00 30 f1 0 Static 00 30 f1 0 Static 00 30 f1 0 Static 00 30 f1 2f Dynamic 00 30 f1 0 Static 00 00 be 9a fh fE fE TE EE Static 00 03 20 21 22 23 24 25 26 27 30 9c ff Port Fwd_type Outdoor lla Bui
205. orts except for designated ports should receive configuration messages at regular intervals Any port that ages out STP information provided in the last configuration message becomes the designated port for the attached LAN If it is a root port a new root port is selected from among the device ports attached to the network Range 6 40 seconds e Default 20 e Minimum The higher of 6 or 2 x Hello Time 1 e Maximum The lower of 40 or 2 x Forward Delay 1 a Bridge Hello Time Interval in seconds at which the root device transmits a configuration message Range 1 10 seconds e Default 2 e Minimum 1 e Maximum The lower of 10 or Max Message Age 2 1 a Bridge Forwarding Delay The maximum time in seconds this device waits before changing states i e discarding to learning to forwarding This delay is required because every device must receive information about topology changes before it starts to forward frames In addition each port needs time to listen for conflicting information that would make it return to a discarding state otherwise temporary data loops might result Range 4 30 seconds e Default 15 e Minimum The higher of 4 or Max Message Age 2 1 e Maximum 30 a Link Path Cost This parameter is used by the STP to determine the best path between devices Therefore lower values should be assigned to ports attached to faster media and higher values assigned to ports with slowe
206. p dio interface Select the VAP you wish to configure 1 1 Service Set ID Enter the service set identifier in the SSID box which all wireless clients must use to associate with the access point The SSID is case sensitive and can consist of up to 32 alphanumeric characters 4 6 Using the Setup Wizard Figure 6 Setup Wizard Step 1 Mr Home ORS E SSID O channel 802 11a Radio IP Configuration ON ea The SSID is designed for the 802 11a Radio radio to identify the appropriate clients O Security Only clients with the same SSID can associate with this device SSID 3Com1 E 802 11g Radio The SSID is designed for the 802 11g Radio radio to identify the appropriate clients Only clients with the same SSID can associate with this device SSID 3Coms e 2 Radio Channel You must enable radio communications for 802 11a and 802 11b g and set the operating radio channel i NOTE Available channel settings are limited by local regulations which determine the channels that are available This User Guide shows channels and settings that apply to North America United States and Canada with 13 channels available for the 802 11a interface and 11 channels for the 802 11g interface Other regions my have different channels and settings available Figure 7 Setup Wizard Step 2 Eh Home K a ssio Channel channel 802 114 Radio O IP Configuration Turbo Mode Disable Enable O Security Rad
207. power to the wireless bridge as well as a data link to the local network The wireless bridge appears as an Ethernet node and performs a bridging function by moving packets from the wired LAN to the remote end of the wireless bridge link NOTE The power injector module does not support Power over Ethernet PoE based on the IEEE 802 3af standard The wireless bridge unit must always be powered on by being connected to the power injector module POWER INJECTOR MODULE The wireless bridge receives power through its network cable connection using power over Ethernet technology A power injector module is included in the wireless bridge package and provides two RJ 45 Ethernet ports one for connecting to the wireless bridge Output and the other for connecting to a local LAN switch Input The Input port uses an MDI i e internal straight through pin configuration You can therefore use straight through twisted pair cable to connect this port to most 1 5 network interconnection devices such as a switch or router that provide MDI X ports However when connecting the access point to a workstation or other device that does not have MDI X ports you must use crossover twisted pair cable AC Power Socket Hidden LED Indigator Input Output w Ethernet from Local Ethernet and Power Network to Wireless Bridge The wireless bridge does not have a power switch It is powered o
208. prior to using the snmp server host command Maximum length 23 characters Default Setting Host Address None Community String public Command Mode Global Configuration Command Usage The snmp server host command is used in conjunction with the snmp server enable server command to enable SNMP notifications Example Outdoor lla Building to Building config snmp server host 1 10 1 19 23 batman Outdoor lla Building to Building config Related Commands snmp server enable server 6 48 snmp server trap This command enables the access point to send specific SNMP traps i e notifications Use the no form to disable specific trap messages Syntax snmp server trap lt trap gt no snmp server trap lt trap gt trap One of the following SNMP trap messages dot11InterfaceAFail The 802 11a or 802 11g interface has failed dot11InterfaceGFail The 802 11b g interface has failed dot11StationAssociation A client station has successfully associated with the access point dot11StationAuthentication A client station has been successfully authenticated dot11StationReAssociation A client station has successfully CHAPTER 6 COMMAND LINE INTERFACE re associated with the access point dot11StationRequestFail A client station has failed association re association or authentication dot1xAuthFail A 802 1X client station has failed RADIUS authentication dot1xAuthNotlnitiated A client station
209. r cable for 10 Mbps connections or 100 ohm Category 5 or better cable for 100 Mbps connections Also be sure that the length of any twisted pair connection does not exceed 100 meters 328 feet The RJ 45 Input port on the power injector is wired with MDI pinouts This means that you must use crossover cables for connections to PCs or servers and straight through cable for connections to switches or hubs However when connecting to devices that support automatic MDI MDI X pinout configuration you can use either straight through or crossover cable 10 100BASE TX MDI and MDI X Port Pinouts Pin MDI X Signal Name MDI Signal Name 1 Receive Data plus RD Transmit Data plus TD 2 Receive Data minus RD Transmit Data minus TD 3 Transmit Data plus TD Receive Data plus RD 6 Transmit Data minus TD Receive Data minus RD 4 5 7 8 Not used Not used Note The and signs represent the polarity of the wires that make up each wire pair B 2 STRAIGHT THROUGH WIRING Because the 10 100 Mbps Input port on the power injector uses an MDI pin configuration you must use straight through cable for network connections to hubs or switches that only have MDI X ports However if the device to which you are connecting supports automatic MDI MDI X operation you can use either straight through or crossover cable EIA TIA 568B RJ 45 Wiring Standard 10 100BASE TX Straight through Cable White Orange Stripe
210. r media Path cost takes precedence over port priority e Range 1 65535 e Default Ethernet interface 19 Wireless interface 40 a Link Port Priority Defines the priority used for this port in the Spanning Tree Protocol If the path cost for all ports on a switch are the same the port with the highest priority i e lowest value will be configured as an active link in the spanning tree This makes a port with higher priority less likely to be blocked if 5 32 System Log the Spanning Tree Protocol is detecting network loops Where more than one port is assigned the highest priority the port with lowest numeric identifier will be enabled e Default 128 e Range 0 240 in steps of 16 SYSTEM LOG The access point can be configured to send event and error messages to a System Log Server The system clock can also be synchronized with a time server so that all the messages sent to the Syslog server are stamped with the correct time and date Figure 28 System Log amp i System Log 4 System Log Setup Disable Enable SNTP Server Disable O Enable ii Set Time Zone Enter Time Zone GMT 05 Eastem Time US amp Canada DEnable Daylight Saving 2e ENABLING SYSTEM LOGGING The access point supports a logging process that can control error messages saved to memory or sent to a Syslog server The logged messages serve as a valuable tool for isolating access point and network problems Syst
211. r to IEEE 802 1X authentication However it is better to choose one or the other as appropriate IEEE 802 1X is a standard framework for network access control that uses a central RADIUS server for user authentication This control feature prevents unauthorized access to the network by requiring an 802 1X client application to submit user credentials for authentication The 802 1X standard uses the Extensible Authentication Protocol EAP to pass user credentials either digital certificates user names and passwords or other from the client to the RADIUS server Client authentication is then verified on the RADIUS server before the access point grants client access to the network The 802 1X EAP packets are also used to pass dynamic unicast session keys and static broadcast keys to wireless clients Session keys are unique to each client and are used to encrypt and correlate traffic passing between a specific client and the access point You can also enable broadcast key rotation so the access point provides a dynamic broadcast key and changes it at a specified interval Authentication The access point can also operate in a 802 1X supplicant mode This enables the access point itself to be authenticated with a RADIUS server using a configured MD5 user name and password This prevents rogue access points from gaining access to the network Take note of the following points before configuring MAC address or 802 1X authentication a Use MA
212. rase The password or key associated with the authentication and privacy settings A minimum of eight plain text characters is required Action Click the Add button to add a new user to the list Click the edit button to change details of an existing user Click the Del button to remove a user from the list example a user who has Auth Type and Priv Type configured to MD5 and DES respectively that it uses both authentication and data encryption must be assigned to the RWPriv group If this same user were instead assigned to the read only RO group the user would not be able to access the database fi NOTE Users must be assigned to groups that have the same security levels For ADMINISTRATION CHANGING THE PASSWORD Management access to the web and CLI interface on the access point is controlled through a single user name and password You can also gain additional access security by using control filters see Filter Control on page 15 To protect access to the management interface you need to configure an Administrator s user name and password as soon as possible If the user name and password are not configured then anyone having access to the access point may be able to compromise access point and network security Once a new Administrator has been configured you can delete the default admin user name from the system CHAPTER 5 SYSTEM CONFIGURATION Figure 22 Administration Administratio
213. rdware Show hardware version history Display the session history interface Show interface information line TTY line information link integrity Show link integrity information logging Show the logging buffers radius Show radius server rogue ap Show Rogue ap Stations snmp Show snmp configuration sntp Show sntp configuration station Show 802 11 station table system Show system information version Show system version Outdoor lla Building to Building show The command show interface will display the following information Outdoor lla Building to Building show interface ethernet Show Ethernet interface wireless Show wireless interface lt cr gt Outdoor lla Building to Building show interface Partial Keyword Lookup If you terminate a partial keyword with a question mark alternatives that match the initial letters are provided Remember not to leave a space between the command and question mark For example s shows all the keywords starting with s Outdoor lla Building to Building show s snmp sntp station system Outdoor lla Building to Building show s 6 4 Using the Command Line Interface Negating the Effect of Commands For many configuration commands you can enter the prefix keyword no to cancel the effect of a command or reset the configuration to the default value For example the logging command will log system messages to a host server To disable logging specify the no logg
214. re that power is being supplied Be sure that antennas in the link are properly aligned Be sure that channel settings match on all bridges If encryption is enabled ensure that all bridge links are configured with the same encryption keys If you experience poor performance high packet loss rate over the wireless bridge link a Check that the range of the link is within the limits for the antennas used a Be sure that antennas in the link are properly aligned a Check that there is an unobstructed radio line of sight between the antennas a Be sure there is no interference from other radio sources Try setting the bridge link to another radio channel a Be sure there is no other radio transmitter too close to either antenna If necessary move the antennas to another location If wireless clients cannot access the network check the following a Be sure the bridge and the wireless clients are configured with the same Service Set ID SSID a f authentication or encryption are enabled ensure that the wireless clients are properly configured with the appropriate authentication or encryption keys If authentication is being performed through a RADIUS server ensure that the clients are properly configured on the RADIUS server a If authentication is being performed through IEEE 802 1X be sure the wireless users have installed and properly configured 802 1X client software If MAC address filtering is enabled b
215. reboot sysSystemUp The access point is up and running Using the Command Line Interface Default Setting All traps enabled Command Mode Global Configuration Command Usage This command is used in conjunction with the snmp server host and snmp server enable server commands to enable SNMP notifications Example Outdoor lla Building to Building config no snmp server trap dot11StationAssociation Outdoor lla Building to Building config snmp server engine id This command is used for SNMP v3 It is used to uniquely identify the access point among all access points in the network Use the no form to delete the engine ID Syntax snmp server engine id lt engine id gt no snmp server engine id engine id Enter engine id in hexadecimal 5 32 characters Default Setting Enabled Command Mode Global Configuration Command Usage e This command is used in conjunction with the snmp server user Command e Entering this command invalidates all engine IDs that have been previously configured e If the enginelD is deleted or changed all SNMP users will be cleared You will need to reconfigure all existing users CHAPTER 6 COMMAND LINE INTERFACE Example Outdoor lla Building to Building config snmp server engine id la 2b 3c 4d 00 ff Outdoor lla Building to Building config snmp server user This command configures the SNMP v3 users that are allowed to manage the access point Use the no form to delete an SNMP v3 user
216. reless g VAP 0 max association 32 Outdoor 1la Building to Building if wireless g assoc timeout interval This command configures the idle time interval when no frames are sent after which the client is disassociated from the VAP interface Syntax assoc timeout interval lt minutes gt minutes The number of minutes of inactivity before disassociation Range 5 60 6 127 CHAPTER 6 COMMAND LINE INTERFACE Default Setting 30 Command Mode Interface Configuration Wireless VAP Example Outdoor lla Building to Building if wireless g VAP 0 association timeout interval 20 Outdoor lla Building to Building if wireless g VAP 0 auth timeout value This command configures the time interval within which clients must complete authentication to the VAP interface Syntax auth timeout value lt minutes gt minutes The number of minutes before re authentication Range 5 60 Default Setting 60 Command Mode Interface Configuration Wireless VAP Example Outdoor 11a Building to Building if wireless g VAP 0 auth timeout value 40 Outdoor lla Building to Building if wireless g VAP 0 shutdown This command disables the wireless interface Use the no form to restart the interface Syntax no shutdown Default Setting Interface enabled 6 128 Using the Command Line Interface Command Mode Interface Configuration Wireless VAP Command Usage You must first enable VAP interface O before you can
217. ridge to interact with other bridging devices that is an STP compliant switch bridge or router in your network to ensure that only one route exists between any two stations on the network and provide backup links which automatically take over when a primary link goes down WDS and Spanning Tree Settings Figure 25 WDS and Spanning Tree Settings or a fi WDS Setting Radio Interface 1 802 114 Bridge Role OAP Bridge ORepeater ORoot Bridge TCPIIP Settings Master Slave Mode Master O Slave RADIUS hannel A Authentication Channel Auto Sync Disable Enable Filter Control Bridge Parent 00 00 00 00 00 00 SNMP Bridge Child 4 Administration ia 00 00 00 00 00 00 WDSISTP Settings 00 00 00 00 00 00 00 00 00 00 00 00 2 3 4 00 00 00 00 00 00 5 6 00 00 00 00 00 00 Radio Interface 2 802 110 Bridge Role AP OBridge ORepeater ORoot Brdge WDS Bridge Up to six WDS bridge or repeater links MAC addresses per radio interface can be specified for each unit in the wireless bridge network One unit only must be configured as the root bridge in the wireless network The root bridge is the unit connected to the main core of the wired LAN Other bridges need to specify one Parent link to the root bridge or to a bridge connected to the root bridge The other five WDS links are available as Child links to other bridges a Bridge Role Each radio interface can be set to
218. ridge acting as the master bridge s parent Configures the MAC addresses of the parent bridge IC W 6 90 node Configures MAC addresses of connected child bridge IC W 6 91 nodes Sets the aging time for dynamic entries in the WDS GC 6 92 forwarding table Displays the current WDS forwarding table aging time Exec 6 94 Displays current entries in the bridge MAC address Exec 6 95 table Displays current bridge settings for specified interfaces Exec 6 97 6 88 Using the Command Line Interface bridge mode This command selects between Master and Slave mode Syntax bridge mode lt master slave gt e master Operates as a master enabling up to five slave links e slave Operates as a slave with only one link to the master Default Setting Master Command Mode Interface Configuration Wireless Example Outdoor 1la Building to Building if wireless a bridge mode master Outdoor lla Building to Building if wireless a bridge role WDS This command selects the bridge operation mode for the radio interface Syntax bridge role lt ap repeater bridge root bridge gt e ap Operates only as an access point for wireless clients e repeater Operates as a wireless repeater extending the range for remote wireless clients and connecting them to the root bridge The Parent link to the root bridge must be configured In this mode traffic is not forwarded to the Ethernet port from the radio interface e bridge Opera
219. rs Default Setting Outdoor 11a Building to Building Command Mode Global Configuration Example Outdoor 1la Building to Building config system name AP Outdoor lla Building to Building config username This command configures the user name for management access Syntax username lt name gt name The name of the user Length 3 16 characters case sensitive Using the Command Line Interface Default Setting admin Command Mode Global Configuration Example Outdoor lla Building to Building config username bob Outdoor lla Building to Building config password After initially logging onto the system you should set the password Remember to record it in a safe place Use the no form to reset the default password Syntax password lt password gt no password password Password for management access Length 3 16 characters case sensitive Default Setting null Command Mode Global Configuration Example Outdoor lla Building to Building config password Outdoor lla Building to Building config ip ssh server enable This command enables the Secure Shell server Use the no form to disable the server Syntax ip ssh server enable no ip ssh server Default Setting Disabled CHAPTER 6 COMMAND LINE INTERFACE Command Mode Interface Configuration Ethernet Command Usage e The access point supports Secure Shell version 2 0 only e After boot up the SSH server needs about two minutes
220. rver contact Sets the system contact string GC 6 46 snmp server location Sets the system location string GC 6 47 Management Access username Configures the user name for management access GC 6 16 password Specifies the password for management access GC 6 17 ip ssh server enable Enables the Secure Shell server IC E 6 17 ip ssh server port Sets the Secure Shell port IC E 6 18 ip telnet server enable Enables the Telnet server IC E 6 18 APmgmtIP Specifies an IP address or range of addresses allowed access GC 6 23 to the management interface APmgmtUl Enables or disables SNMP Telnet or web management access GC 6 24 show APmanagement Shows the AP management configuration Exec 6 25 Web Server ip http port Specifies the port to be used by the web browser interface GC 6 19 ip http server Allows the access point to be monitored or configured from GC 6 19 a browser ip https port Specifies the UDP port number used for a secure HTTP GC 6 20 connection to the access point s Web interface ip https server Enables the secure HTTP server on the access point GC 6 21 web redirect Enables web authentication of clients using a public access GC 6 22 Internet service System Status show system Displays system information Exec 6 26 show version Displays version information for the system Exec 6 27 show config Displays detailed configuration information for the system Exec 6 27 show hardware Displays the access point s hardware version Exec 6 32
221. ry SNTP or NTP time server The access point first attempts to update the time from the primary server if this fails it attempts an update from the secondary server NOTE The access point also allows you to disable SNTP and set the system clock manually Set Time Zone SNTP uses Coordinated Universal Time or UTC formerly Greenwich Mean Time or GMT based on the time at the Earth s prime meridian zero degrees longitude To display a time corresponding to your local time you must indicate the number of hours your time zone is located before east or after west UTC Enable Daylight Saving The access point provides a way to automatically adjust the system clock for Daylight Savings Time changes To use this feature you must define the month and date to begin and to end the change from standard time During this period the system clock is set back by one hour The RSSI value displayed on the RSSI page represents a signal to noise ratio A value of 30 would indicate that the power of the received signal is 30 dBm above the signal noise threshold This value can be used to align antennas and monitor the quality of the received signal for bridge links An RSSI value of about 30 or more indicates a strong enough signal to support the maximum data rate of 54 Mbps Below a value of 30 the supported data rate would drop to lower rates A value of 15 or less indicates that the signal is weak and the antennas may require realignment The R
222. s Ad Hoc An ad hoc wireless LAN is a group of computers each with wireless adapters connected as an independent wireless LAN Backbone The core infrastructure of a network The portion of the network that transports information from one central location to another central location where it is unloaded onto a local system Base Station In mobile telecommunications a base station is the central radio transmitter receiver that maintains communications with the mobile radiotelephone sets within its range In cellular and personal communications applications each cell or micro cell has its own base station each base station in turn is interconnected with other cells bases BSS Basic Service Set It is an access point and all the LAN PCs that are associated with it CSMA CA Carrier Sense Multiple Access with Collision Avoidance EAP Extensible Authentication Protocol which provides a generalized framework for several different authentication methods ESS Extended Service Set More than one BSS is configured to become an ESS LAN mobile users can roam between different BSSs in an ESS ESS ID SSID Ethernet A popular local area data communications network which accepts transmission from computers and terminals Infrastructure An integrated wireless and wired LAN is called an infrastructure configuration RADIUS Remote Access Dial In User Server is an authentication method used in conjunction with EAP for 802
223. s or SSID configuration A database of nearby access points should therefore be maintained on a RADIUS server allowing any rogue APs to be identified see rogue ap authenticate on page 135 6 134 Using the Command Line Interface The rogue AP database can be viewed using the show rogue ap command e The access point sends Syslog messages for each detected access point during a rogue AP scan Example Outdoor lla Building to Building if wireless g rogue ap enable configure either syslog or trap or both to receive the rogue APs detected Outdoor 1la Building to Building if wireless g rogue ap authenticate This command forces the unit to authenticate all access points on the network Use the no form to disable this function Syntax no rogue ap authenticate Default Setting Disabled Command Mode Interface Configuration Wireless Command Usage Enabling authentication in conjunction with a database of approved access points stored on a RADIUS server allows the access point to discover rogue APs With authentication enabled and a configure RADIUS server the access point checks the MAC address Basic Service Set Identifier BSSID of each access point that it finds against a RADIUS server to determine whether the access point is allowed With authentication disabled the access point can identify its neighboring access points only it cannot identify whether the 6 135 CHAPTER 6 COMMAND LINE INTERFACE access poi
224. s are operating bridge link antennas must be accurately aligned to ensure optimum performance This alignment process is particularly important for long range point to point links In a point to multipoint configuration the root bridge uses an omnidirectional or sector antenna which does not require alignment but bridge nodes still need to be correctly aligned with the root bridge antenna Point to Point Configurations In a point to point configuration the alignment process requires two people one at each end of the link The use of cell phones or two way radio communication may help with coordination To start you can just point the antennas at each other using binoculars or a compass to set the general direction For accurate alignment you must monitor the signal strength LEDs as the antenna moves horizontally and vertically Point to Multipoint Configurations In a point to multipoint configuration all bridge nodes must be aligned with the root bridge antenna The alignment process is the same as in point to point links but only the bridge node end of the link requires the alignment The signal strength LEDs indicate the received radio signal strength for a particular bridge link The more LEDs that turn on the stronger the signal Alternatively you can monitor the Receive Signal Strength Indicator RSSI value directly from the management interface The higher the RSSI value the stronger the signal When you move the antenna
225. s indicated in the following table Number RADIUS Attribute Value 64 Tunnel Type VLAN 13 65 Tunnel Medium Type 802 81 Tunnel Private Group ID VLANID 1 to 4094 as hexadecimal or string VLAN IDs on the RADIUS server can be entered as hexadecimal digits or a string see radius server vlan format on page 63 i NOTE The specific configuration of RADIUS server software is beyond the scope of this guide Refer to the documentation provided with the RADIUS server software Figure 18 Filter Control VLAN ID i Filter Control Management VLAN ID I VLAN Disable Enable VLAN Enables or disables VLAN tagging support on the access point Management VLAN ID The VLAN ID that traffic must have to be able to manage the access point Range 1 4094 Default 1 SNMP SNMP Simple Network Management Protocol SNMP is a communication protocol designed specifically for managing devices on a network Equipment commonly managed with SNMP includes switches routers and host computers SNMP is typically used to configure these devices for proper operation in a network environment as well as to monitor them to evaluate performance or detect potential problems Managed devices supporting SNMP contain software which runs locally on the device and is referred to as an agent A defined set of variables known as managed objects is maintained by the SNMP agent and used to manage the device These objects are d
226. s selection of specific SNMP notifications to send The following items are available a sysSystemUp The access point is up and running sysSystemDown The access point is about to shutdown and reboot a sysRadiusServerChanged The access point has changed from the primary RADIUS server to the secondary or from the secondary to the primary a dot11StationAssociation A client station has successfully associated with the access point a dot11StationReAssociation A client station has successfully re associated with the access point a dot11StationAuthentication A client station has been successfully authenticated a dot11StationRequestFail A client station has failed association re association or authentication a dot 1InterfaceGFail The 802 11b interface has failed a dott 1InterfaceAFail The 802 11a or 802 11g interface has failed 5 21 CHAPTER 5 SYSTEM CONFIGURATION a dot1xMacAddrAuthSuccess A client station has successfully authenticated its MAC address with the RADIUS server a dot1xMacAddrAuthFail A client station has failed MAC address authentication with the RADIUS server a dottxAuthNotlinitiated A client station did not initiate 802 1X authentication a dot1xAuthSuccess A 802 1X client station has been successfully authenticated by the RADIUS server a dottxAuthFail A 802 1X client station has failed RADIUS authentication a localMacAddrAuthSuccess A client station has successfull
227. s used externally to determine which device has access to the wireless medium For each AC queue the collision resolution mechanism is dependent on two timing parameters a AIFSN Arbitration Inter Frame Space Number a number used to calculate the minimum time between data frames a CW Contention Window a number used to calculate a random backoff time After a collision detection a backoff wait time is calculated The total wait time is the sum of a minimum wait time Arbitration Inter Frame Space or AIFS determined from the AIFSN and a random backoff time calculated from a value selected from zero to the CW The CW value varies within a configurable range It starts at CWMin and doubles after every collision up to a maximum value CWMax After a successful transmission the CW value is reset to its CWMin value Figure 33 WMM Backoff Times Random Backoff High Priority J Minimum Wait Time Random Wait Time CWMin CWMax l Low Priority Random Backoff Random Wait Time Minimum Wait Time For high priority traffic the AIFSN and CW values are smaller The smaller values equate to less backoff and wait time and therefore more transmit opportunities To configure WMM select the Radio Settings page and scroll down to the WMM configuration settings CHAPTER 5 SYSTEM CONFIGURATION Figure 34 WMM Configuration a Acknowledge O No Acknovtedge Acknowledge N
228. server software is beyond the scope of this guide refer to the documentation provided with the RADIUS server software 5 8 RADIUS Figure 15 RADIUS Authentication i L 1812 an u 0000 3 a in a RADIUS servers assign client VLAN ID in O HEX format String format Primary Radius Server Setup Configure the following settings to use RADIUS authentication on the access point a P Address Specifies the IP address or host name of the RADIUS server a Port The UDP port number used by the RADIUS server for authentication messages Range 1024 65535 Default 1812 a Key A shared text string used to encrypt messages between the access point and the RADIUS server Be sure that the same text string is specified on the RADIUS server Do not use blank spaces in the string Maximum length 255 characters a Timeout Number of seconds the access point waits for a reply from the RADIUS server before resending a request Range 1 60 seconds Default 5 a Retransmit attempts The number of times the access point tries to resend a request to the RADIUS server before authentication fails Range 1 30 Default 3 NOTE For the Timeout and Retransmit attempts fields accept the default values i unless you experience problems connecting to the RADIUS server over the network CHAPTER 5 SYSTEM CONFIGURATION Secondary Radius Server Setup Configure a secondary RADIUS server to provide
229. siderations is listed in the following table Table 4 Wireless Security Considerations Security Client Support Implementation Considerations Mechanism WEP Built in support on all 802 11a Provides only weak security and 802 11g devices Requires manual key management WEP over 802 1X Requires 802 1X client support Provides dynamic key rotation for improved WEP in system or by add in software security support provided in Windows Requires configured RADIUS server 2000 SP3 or later and Windows g02 1X EAP type may require management of XP digital certificates for clients and server MAC Address Uses the MAC address of client Provides only weak user authentication Filtering network card e Management of authorized MAC addresses Can be combined with other methods for improved security e Optionally configured RADIUS server 5 50 Security Security Client Support Implementation Considerations Mechanism WPA over 802 1X Requires WPA enabled system Provides robust security in WPA only mode Mode and network card driver i e WPA clients only native support provided in e Offers support for legacy WEP clients but with Windows XP increased security risk i e WEP authentication WPA PSK Mode Requires WPA enabled system e and network card driver native support provided in Windows XP WPA2 with Requires WPA enabled system e 802 1X and network card driver native support provided in Windows e XP WPA2 PSK Mode
230. sity system Select this method when the Antenna ID is set to Default Antenna to use the access point s integrated antennas The access point does not support external diversity antennas e right To activate the 5 GHz external antenna one must select the right antenna in the antenna selection UI e left To activate the 2 4 GHz external antenna one must select the left antenna in the antenna selection UI Default Setting Diversity Command Mode Interface Configuration Wireless Command Usage The antenna ID must be selected in conjunction with the antenna control method to configure proper use of any of the antenna options Example Outdoor lla Building to Building if wireless g antenna control right Outdoor lla Building to Building if wireless g 6 119 CHAPTER 6 COMMAND LINE INTERFACE antenna id This command specifies the antenna type connected to the access point represented by a four digit hexadecimal ID number either the integrated diversity antennas the Default Antenna or an optional external antenna Syntax antenna id lt antenna id gt e antenna id Specifies the ID number of an approved antenna that is connected to the access point Range 0x0000 OxFFFF Default Setting 0x0000 built in antennas Command Mode Interface Configuration Wireless Command Usage e The optional external antennas if any that are certified for use with the access point are listed by typing antenna con
231. ss Authorized management stations are able to both retrieve and modify MIB objects Command Mode Global Configuration Command Usage If you enter a community string without the ro or rw option the default is read only Example Outdoor lla Building to Building config snmp server community alpha rw Outdoor lla Building to Building config snmp server contact This command sets the system contact string Use the no form to remove the system contact information Syntax snmp server contact string no snmp server contact string String that describes the system contact Maximum length 255 characters Using the Command Line Interface Default Setting None Command Mode Global Configuration Example Outdoor lla Building to Building config snmp server contact Paul Outdoor lla Building to Building config Related Commands snmp server location 6 47 snmp server location This command sets the system location string Use the no form to remove the location string Syntax snmp server location lt text gt no snmp server location text String that describes the system location Maximum length 255 characters Default Setting None Command Mode Global Configuration Example Outdoor lla Building to Building config snmp server location WC 19 Outdoor lla Building to Building config Related Commands snmp server contact 6 46 6 47 CHAPTER 6 COMMAND LINE INTERFACE snmp server en
232. ss a Related Commands bridge link path cost 6 103 show bridge stp This command displays aging time and spanning tree settings for the Ethernet and wireless interfaces 6 104 Using the Command Line Interface Syntax show bridge stp Command Mode Exec Example Outdoor 1la Building to Building show bridge stp Bridge MAC 00 12 CF 05 B7 84 Status Disabled priority 3 Q designated root priority 0 MAC 00 00 00 00 00 00 root path cost g root Port no 0 Hold Time 1 Seconds Hello Time 2 Seconds Maximum Age 20 Seconds Forward Delay 15 Seconds bridge Hello Time 2 Seconds bridge Maximum Age 20 Seconds bridge Forward Delay 15 Seconds time since top change 89185 Seconds topology change count 0 Outdoor lla Building to Building Ethernet Interface Commands The commands described in this section configure connection parameters for the Ethernet port and wireless interface Table 24 Ehternet Interface Commands Command Function Mode Page interface ethernet Enters Ethernet interface configuration mode GC 6 106 dns primary server Specifies the primary name server IC E 6 106 dns secondary server Specifies the secondary name server IC E 6 106 ip address Sets the IP address for the Ethernet interface IC E 6 107 ip dhcp Submits a DHCP request for an IP address IC E 6 108 speed duplex Configures speed and duplex operation on the IC E 6 109 Ethernet interface shutdown Disables the Ethernet interfa
233. t port on the wireless bridge 2 For extra protection against rain or moisture apply weatherproofing tape not included around the Ethernet connector 3 Be sure to ground the unit with an appropriate grounding wire not included by attaching it to the grounding screw on the unit 4 Be sure to install a lightning arrestor on the Ethernet cable between the bridge and power injector The lightning arrestor should be placed outdoors immediately before the Ethernet cable enters the building CAUTION Be sure that grounding is available and that it meets local and national electrical codes Console Port PoE Ethernet Port Ground Wire Grounding Screw __ Pin Ethernet Cable CONNECT THE POWER INJECTOR To connect the wireless bridge to a power source CAUTION Do not install the power injector outdoors The unit is for indoor installation only 3 7 Li NOTE The wireless bridge s Ethernet port does not support Power over Ethernet PoE based on the IEEE 802 3af standard Do not try to power the unit by connecting it directly to a network switch that provides IEEE 802 3af PoE Always connect the unit to the included power injector module 1 Connect the Ethernet cable from the wireless bridge to the RJ 45 port labeled Output on the power injector 2 Connect a straight through unshielded twisted pair UTP cable from a local LAN switch to the RJ 45 port labeled Input on the power injector
234. t supported by the access point Range 1 32 characters Default Setting 802 11a Radio VAP_TEST_11A 0 to 3 802 11g Radio VAP_TEST_11G 0 to 3 Command Mode Interface Configuration Wireless VAP Command Usage Clients that want to connect to the wireless network via an access point must set their SSIDs to the same as that of the access point Example Outdoor lla Building to Building if wireless g VAP 0 ssid RD AP 3 Outdoor 1la Building to Building if wireless g closed system This command prohibits access to clients without a pre configured SSID Use the no form to disable this feature Syntax no closed system Default Setting Disabled 6 126 Using the Command Line Interface Command Mode Interface Configuration Wireless VAP Command Usage When closed system is enabled the access point will not include its SSID in beacon messages Nor will it resoond to probe requests from clients that do not include a fixed SSID Example Outdoor lla Building to Building if wireless g VAP 0 closed system Outdoor 1la Building to Building if wireless g max association This command configures the maximum number of clients that can be associated with the access point at the same time Syntax max association lt count gt count Maximum number of associated stations Range 0 64 Default Setting 64 Command Mode Interface Configuration Wireless VAP Example Outdoor lla Building to Building if wi
235. tation After successful 802 11 association each client is allowed to access the network e When 802 1X is supported the access point supports 802 1X authentication only for clients initiating the 802 1X authentication process i e the access point does NOT initiate 802 1X authentication For 6 72 Using the Command Line Interface stations initiating 802 1X only those stations successfully authenticated are allowed to access the network For those stations not initiating 802 1X access to the network is allowed after successful 802 11 association CHAPTER 6 COMMAND LINE INTERFACE e When 802 1X is required the access point enforces 802 1X authentication for all 802 11 associated stations If 802 1X authentication is not initiated by the station the access point will initiate authentication Only those stations successfully authenticated with 802 1X are allowed to access the network e 802 1X does not apply to the 10 100Base TX port Example Outdoor lla Building to Building config 802 1x supported Outdoor lla Building to Building config 802 1x broadcast key refresh rate This command sets the interval at which the broadcast keys are refreshed for stations using 802 1X dynamic keying Syntax 802 1x broadcast key refresh rate lt rate gt rate The interval at which the access point rotates broadcast keys Range O 1440 minutes Default Setting O Disabled Command Mode Global Configuration Command Usage
236. tax show interface ethernet Default Setting Ethernet interface Command Mode Exec Example Outdoor lla Building to Building show interface ethernet Ethernet Interface Information IP Address p 1924 254 2al Subnet Mask 2 250295259570 Default Gateway 2 192254226253 Primary DNS s L922 25442 95 Secondary DNS 2 20 1 0 55 Speed duplex 100Base TX Half Duplex Admin status Up Operational status Up Outdoor lla Building to Building 6 110 Using the Command Line Interface Wireless Interface Commands The commands described in this section configure connection parameters for the wireless interfaces Table 25 Wireless Interface Commands Command Function Mode Page interface wireless Enters wireless interface configuration mode GC 6 112 vap Provides access to the VAP interface configuration IC W 6 113 mode speed Configures the maximum data rate at which the IC W 6 113 access point transmits unicast packets turbo Configures turbo mode to use a faster data rate IC W a 6 114 multicast data rate Configures the maximum rate for transmitting IC W 6 115 multicast packets on the wireless interface channel Configures the radio channel IC W 6 116 transmit power Adjusts the power of the radio signals transmitted IC W 6 117 from the access point radio mode Forces the operating mode of the 802 11g radio IC W b g 6 117 preamble Sets the length of the 802 11g signal preamble IC W b g 6 118 antenna control Selects t
237. tdoor lla Building to Building config ip https server Use this command to enable the secure hypertext transfer protocol HTTPS over the Secure Socket Layer SSL providing secure access i e an encrypted connection to the access point s Web interface Use the no form to disable this function Syntax no ip https server Default Setting Disabled Command Mode Global Configuration Command Usage e Both HTTP and HTTPS service can be enabled independently e If you enable HTTPS you must indicate this in the URL https device port_number e When you start HTTPS the connection is established in this way The client authenticates the server using the server s digital certificate The client and server negotiate a set of security protocols to use for the connection The client and server generate session keys for encrypting and decrypting data e The client and server establish a secure encrypted connection A padlock icon should appear in the status bar for Internet Explorer 5 x Example Outdoor lla Building to Building config ip https server Outdoor lla Building to Building config CHAPTER 6 COMMAND LINE INTERFACE web redirect Use this command to enable web based authentication of clients Use the no form to disable this function Syntax no web redirect Default Setting Disabled Command Mode Global Configuration Command Usage e The web redirect feature is used to support billing for a public access
238. tem WEP Wired Equivalent Privacy is used to encrypt transmissions passing between wireless clients and the access point Default Disabled Shared Key Setup If you select Shared Key authentication enable WEP then configure the shared key by selecting 64 bit or 128 bit key type and entering a hexadecimal or ASCII string of the appropriate length The key can be entered as alphanumeric characters or hexadecimal 0 9 A F e g D7 OA 9C 7F E5 Default 128 bit hexadecimal key type 64 Bit Manual Entry The key can contain 10 hexadecimal digits or 5 alphanumeric characters 128 Bit Manual Entry The key can contain 26 hexadecimal digits or 13 alphanumeric characters 4 9 CHAPTER 4 INITIAL CONFIGURATION NOTE All wireless devices must be configured with the same Key ID values to communicate with the access point 5 Click Finish 6 Click the OK button to complete the wizard Figure 10 Setup Wizard Completed lt amp Configuration has been saved o 5 SYSTEM CONFIGURATION Before continuing with advanced configuration first complete the initial configuration steps described in Chapter 4 to set up an IP address for the access point The access point can be managed by any computer using a web browser such as Internet Explorer 5 0 or above Enter the configured IP address of the access point or use the default address http 169 254 2 1 To log into the access point enter the default us
239. tes as a bridge to other access points also in bridge mode e root bridge Operates as the root bridge in the wireless bridge network Default Setting AP Command Mode Interface Configuration Wireless Command Usage e When the bridge role is set to repeater the Parent link to the root bridge must be configured see bridge channel auto sync on page 90 CHAPTER 6 COMMAND LINE INTERFACE When the access point is operating in this mode traffic is not forwarded to the Ethernet port from the radio interface e Up to four WDS bridge links MAC addresses per radio interface can be specified for each unit in the wireless bridge network One unit only must be configured as the root bridge in the wireless network The root bridge is the unit connected to the main core of the wired LAN Other bridges need to specify one Parent link to the root bridge or to a bridge connected to the root bridge The other seven WDS links are available as Child links to other bridges e The bridge link on the radio interface always uses the default VAP interface In any bridge mode VAP interfaces 1 to 7 are not available for use Example Outdoor lla Building to Building if wireless a bridge role root bridge Outdoor 1la Building to Building if wireless a bridge channel auto sync CAUTION Do not enable Channel Auto Sync on a master bridge if there is no root bridge acting as the master bridge s parent This c
240. th a Shared key Access point was set to Shared Key Authentication but a client sent an authentication frame for Open System WEP keys do not match When the access point uses Shared Key Authentication but the key used by client and access point are not the same the frame will be decrypted incorrectly using the wrong algorithm and sequence number CHAPTER 5 SYSTEM CONFIGURATION 5 64 COMMAND LINE INTERFACE USING THE COMMAND LINE INTERFACE ACCESSING THE CLI When accessing the management interface for the over a direct connection to the console port or via a Telnet connection the access point can be managed by entering command keywords and parameters at the prompt Using the access point s command line interface CLI is very similar to entering commands on a UNIX system CONSOLE CONNECTION To access the access point through the console port perform these steps 1 At the console prompt enter the user name and password The default user name is admin and the default password is password When the user name is entered the CLI displays the Outdoor 11a Building to Building prompt 2 Enter the necessary commands to complete your desired tasks 3 When finished exit the session with the exit command After connecting to the system through the console port the login screen displays Username admin Password Outdoor lla Building to Building NOTE Command exa
241. three access points in the same area e g channels 1 6 11 Also note that the channel for wireless clients is automatically set to the same as that used by the access point to which it is linked Range 1 11 Default 1 Auto Channel Select Enables the access point to automatically select an unoccupied radio channel Default Enabled Maximum Transmit Data Rate The maximum data rate at which the access point transmits unicast packets on the wireless interface The maximum transmission distance is affected by the data rate The lower the data rate the longer the transmission distance Default 54 Mbps Preamble Length Sets the length of the signal preamble that is used at the start of a data transmission Default Long a Short Sets the preamble to short 96 microseconds Using a short preamble can increase data throughput a Long Sets the preamble to long 192 microseconds Using a long preamble ensures the access point can support all 802 11b and 802 11g clients a Auto Sets the preamble according to the capability of clients that are currently associated Uses a short preamble 96 microseconds if all associated clients can support it otherwise a long preamble is used The access point can increase data throughput when using a short preamble but will only use a short preamble if it determines that all associated clients support it CONFIGURING WI FI MULTIMEDIA Wireless networks offer an equal opportunity
242. tions CHAPTER 5 SYSTEM CONFIGURATION Figure 19 SNMP SYSTEM e Identification E SNMP O Disable Enable TCPAP Settings e RADIUS Authentication e Filter Control SNMP e Administration e WDSISTP Settings e Syslog Set up a RSSI e Status 80 000765 60000027040000001a Disable O Enable 0000 s Disable Enable pooo 802 11a Interface Radio Settings e Security 802 1 1b g Interface e Radio Settings a Security coocoo Disable O Enable 0000 LLLI J Disable O Enable 0000 SNMP Enables or disables SNMP management access and also enables the access point to send SNMP traps notifications Default Disable Location A text string that describes the system location Maximum length 255 characters Contact A text string that describes the system contact Maximum length 255 characters Community Name Read Only Defines the SNMP community access string that has read only access Authorized management stations are only able to retrieve MIB objects Maximum length 23 characters case sensitive Default public Community Name Read Write Defines the SNMP community access string that has read write access Authorized management stations are able to both retrieve and modify MIB objects Maximum length 23 characters case sensitive Default private Trap Destination 1 to 4 Enables recipients up to four of SNMP notifications a Trap Destination IP Ad
243. tp enable This command enables the Spanning Tree Protocol Use the no form to disable the Spanning Tree Protocol 6 99 CHAPTER 6 COMMAND LINE INTERFACE Syntax no bridge stp enable Default Setting Enabled Command Mode Global Configuration Example This example globally enables the Spanning Tree Protocol Outdoor lla Building to Building config bridge stp enable Outdoor lla Building to Building config bridge stp forwarding delay Use this command to configure the spanning tree bridge forward time globally for the wireless bridge Use the no form to restore the default Syntax bridge stp forwarding delay lt seconds gt no bridge stp forwarding delay seconds Time in seconds Range 4 30 seconds The minimum value is the higher of 4 or max age 2 1 Default Setting 15 seconds Command Mode Global Configuration Command Usage This command sets the maximum time in seconds the root device will wait before changing states i e discarding to learning to forwarding This delay is required because every device must receive information about topology 6 100 Using the Command Line Interface changes before it starts to forward frames In addition each port needs time to listen for conflicting information that would make it return to the discarding state otherwise temporary data loops might result Example Outdoor lla Building to Building config bridge stp forwarding delay 20 Outdoor lla Building to Buildin
244. trol id Selecting the correct antenna ID ensures that the access point s radio transmissions are within regulatory power limits for the country of operation e The antenna ID must be selected in conjunction with the antenna control method to configure proper use of any of the antenna options Example Outdoor lla Building to Building if wireless g antenna id 0000 Outdoor lla Building to Building if wireless g antenna location This command selects the antenna mounting location for the radio interface Syntax antenna location lt indoor outdoor gt e indoor The antenna is mounted indoors e outdoor The antenna is mounted outdoors 6 120 Using the Command Line Interface Default Setting Indoor Command Mode Interface Configuration Wireless Command Usage e When an external antenna is selected the antenna control must be set to right e Selecting the correct location ensures that the access point only uses radio channels that are permitted in the country of operation Example Outdoor lla Building to Building if wireless g antenna location indoor Outdoor lla Building to Building if wireless g beacon interval This command configures the rate at which beacon signals are transmitted from the access point Syntax beacon interval lt nterva gt interval The rate for transmitting beacon signals Range 20 1000 milliseconds Default Setting 100 Command Mode Interface Configuration Wir
245. tructure Device Manager Widman included on the 3Com Installation CD to locate the Access Point on the network and view its IP address After you determine the AP s IP address you can enter that IP address into a web browser on a computer on the same subnet to view the Access Point s system status or change its configuration NETWORKS WITHOUT A DHCP SERVER If your network does not have a DHCP server the Access Point uses a factory assigned IP address 169 254 2 1 You can use that IP address to configure the Access Point or you can assign a new IP address to the Access Point To verify that the Access Point is using the default IP address assigned at the factory 4 1 CHAPTER 4 INITIAL CONFIGURATION 1 Connect a computer directly to the Access Point using the supplied standard Category 5 UTP Ethernet cable 2 Enter the Access Point s default IP address 169 254 2 1 into the computer s web browser If the Configuration Management System starts the Access Point is using the factory assigned IP address You can configure the Access Point with the following login information Login name admin Password password If the Configuration Management System does not start the Access Point is on a different subnet than the computer Install and start the 3Com Wireless Infrastructure Device Manager to discover the Access Point s IP address USING THE 3COM INSTALLATION CD The 3Com Installation CD contains the following tools and uti
246. tting up shared keys enables the basic IEEE 802 11 Wired Equivalent Privacy WEP on the access point to prevent unauthorized access to the network If you choose to use WEP shared keys instead of an open system be sure to define at least one static WEP key for user authentication and data encryption Also be sure that the WEP shared keys are the same for each client in the wireless network CHAPTER 5 SYSTEM CONFIGURATION Note that all clients share the same keys which are used for user authentication and data encryption Up to four keys can be specified These four keys are used for all VAP interfaces on the same radio To set up WEP shared keys click Radio Settings under 802 11a or 802 11b g then select Authentication Shared To use all other than WEP shared keys select Authentication Open The following example presumes that you have selected to opt for other methods of encryption than WEP Figure 35 Authentication and Encryption Ream A Security 802 11a Virtual AP 1 3Com1 5i Authentication Open Allow everyone to access Shared Allow users with correct pre shared key to access amp Encryption Disable Enable Cipher Modes AES Use AES as WPA WPA2 Multicast cipher mode O TKIP Use TKIP for Multicast and TKIP WPAWAES WPA2 Unicast packets VWEP TKIP Use WEP for Multicast packets and TIKIPAVEP for Unicast packets Legacy client support Client Types O WEP amp WPA clients
247. tween the access point associated clients and the wired network There can be a VLAN assigned to each associated client a default VLAN for each VAP Virtual Access Point interface and a management VLAN for the access point Note the following points about the access point s VLAN support The management VLAN is for managing the access point through remote management tools such as the web interface SSH SNMP or Telnet The access point only accepts management traffic that is tagged with the specified management VLAN ID a All wireless clients associated to the access point are assigned to a VLAN If IEEE 802 1X is being used to authenticate wireless clients specific VLAN IDs can be configured on the RADIUS server to be assigned to each client If a client is not assigned to a specific VLAN or if 802 1X is not used the client is assigned to the default VLAN for the VAP interface with which it is associated The access point only allows traffic tagged with assigned VLAN IDs or default VLAN IDs to access clients associated on each VAP interface a When VLAN support is enabled on the access point traffic passed to the wired network is tagged with the appropriate VLAN ID either an assigned client VLAN ID default VLAN ID or the management VLAN ID Traffic received from the wired network must also be tagged with one of these known VLAN IDs Received traffic that has an unknown VLAN ID or no VLAN tag is dropped a When VLAN support is
248. ult VLAN for the VAP interface IC W VAP 6 157 6 155 CHAPTER 6 COMMAND LINE INTERFACE vlan This command enables VLANSs for all traffic Use the no form to disable VLANs Syntax no vlan enable Default Disabled Command Mode Global Configuration Command Description e When VLANs are enabled the access point tags frames received from wireless clients with the VLAN ID configured for each client on the RADIUS server If the VLAN ID has not been configured for a client on the RADIUS server then the frames are tagged with the access point s native VLAN ID e Traffic entering the Ethernet port must be tagged with a VLAN ID that matches the access point s native VLAN ID or with a VLAN tag that matches one of the wireless clients currently associated with the access point Example Outdoor lla Building to Building config vlan enable Reboot system now lt y n gt y Related Commands management vlanid 6 156 management vlanid This command configures the management VLAN ID for the access point Syntax management vlanid lt vian id gt vlan id Management VLAN ID Range 1 4094 6 156 Using the Command Line Interface Default Setting 1 Command Mode Global Configuration Command Usage The management VLAN is for managing the access point For example the access point allows traffic that is tagged with the specified VLAN to manage the access point via remote management SSH SNMP Telnet etc Example Out
249. uration Example Outdoor lla Building to Building config ip http port 769 Outdoor lla Building to Building config Related Commands ip http server 6 19 ip http server This command allows this device to be monitored or configured from a browser Use the no form to disable this function Syntax no ip http server Default Setting Enabled CHAPTER 6 COMMAND LINE INTERFACE Command Mode Global Configuration Example Outdoor lla Building to Building config ip http server Outdoor lla Building to Building config Related Commands ip http port 6 19 ip https port Use this command to specify the UDP port number used for HTTPS SSL connection to the access point s Web interface Use the no form to restore the default port Syntax ip https port lt port_number gt no ip https port port_number The UDP port used for HTTPS SSL Range 80 1024 65535 Default Setting 443 Command Mode Global Configuration Command Usage e You cannot configure the HTTP and HTTPS servers to use the same port e To avoid using common reserved TCP port numbers below 1024 the configurable range is restricted to 443 and between 1024 and 65535 e f you change the HTTPS port number clients attempting to connect to the HTTPS server must specify the port number in the URL in this format https device port_number Using the Command Line Interface Example Outdoor lla Building to Building config ip https port 1234 Ou
250. urbo 4 6 km 96 Mbps Turbo 2 1km 108 Mbps Turbo 1 3 km Distances provided in this table are an estimate for a typical deployment and may be reduced by local regulatory limits For accurate distances you need to calculate the power link budget for your specific environment 2 2 RADIO PATH PLANNING Although the wireless bridge uses IEEE 802 11a radio technology which is capable of reducing the effect of multipath signals due to obstructions the wireless bridge link requires a radio line of sight between the two antennas for optimum performance The concept of radio line of sight involves the area along a radio link path through which the bulk of the radio signal power travels This area is known as the first Fresnel Zone of the radio link For a radio link not to be affected by obstacles along its path no object including the ground must intrude within 60 of the first Fresnel Zone The following figure illustrates the concept of a good radio line of sight Visual Line of Sight Radio Line of Sight If there are obstacles in the radio path there may still be a radio link but the quality and strength of the signal will be affected Calculating the maximum clearance from objects on a path is important as it directly affects the decision on antenna placement and height It is especially critical for long distance links where the radio signal could easily be lost When planning the radio path for a wireless bridge link co
251. uthentication Server Noencryptionandno Authentication Open System authentication Encryption Disable 802 1x Disable Static WEP only with Enter 1 to 4 WEP keys Local RADIUS or _Yes3 Disabled Local RADIUS or Yese or without shared Select a WEP transmit key for the interface Disabled key authentication Authentication Shared Key or Open System Encryption Enable 802 1x Disable 5 51 CHAPTER 5 SYSTEM CONFIGURATION Client Security Combination Configuration Summary MAC Authentication gt RADIUS Server Dynamic WEP 802 1x only 802 1x WPA only WPA Pre Shared Key only Static and dynamic 802 1x WEP keys Dynamic WEP and 802 1x WPA Static and dynamic 802 1x WEP keys and 802 1x WPA 802 1x WPA2 only WPA2 Pre Shared Key only Authentication Open System Encryption Enable 802 1x Required Set 802 1x key refresh and re authentication rates Authentication WPA Encryption Enable WPA Configuration Required Cipher Suite TKIP 802 1x Required Set 802 1x key refresh and re authentication rates Authentication WPA PSK Encryption Enable WPA Configuration Required Cipher Configuration TKIP 802 1x Disable WPA Pre shared Key Type Hexadecimal or Alphanumeric Enter a WPA Pre shared key Enter 1 to 4 WEP keys Select a WEP transmit key Authentication Open System Encryption Enable 802 1x Supported Set 802 1x key refresh and re authentication rates
252. ver is 255 characters or 32 characters for files on the access point Valid characters A Z a z 0 9 _ e Due to the size limit of the flash memory the access point supports only two operation code files e The system configuration file must be named syscfg in all copy commands Using the Command Line Interface Example The following example shows how to upload the configuration settings to a file on the TFP server Outdoor lla Building to Building copy config tftp TFTP Source file name syscfg TFTP Server IP 192 254 2 19 Outdoor lla Building to Building The following example shows how to download a configuration file Outdoor lla Building to Building copy tftp file 1 Application image 2 Config file 3 Boot block image Select the type of download lt 1 2 3 gt L 2 TFTP Source file name syscfg TFTP Server IP 192 254 2 19 Outdoor lla Building to Building delete This command deletes a file or image Syntax delete lt filename gt filename Name of the configuration file or image name Default Setting None Command Mode Exec NOTE Beware of deleting application images from flash memory At least one application image is required in order to boot the access point If there are multiple image files in flash memory and the one used to boot the access point is deleted be sure you first use the bootfile command to update the application image file booted at startup before you reboot
253. ver targets This command configures SNMP v3 notification targets Use the no form to delete an SNMP v3 target CHAPTER 6 COMMAND LINE INTERFACE Syntax snmp server targets lt target id gt lt ip addr gt lt sec name gt version 3 udp port port number notification type TRAP no snmp server targets lt target id gt target id A user defined name that identifies a receiver of SNMP notifications Maximum length 32 characters ip addr Specifies the IP address of the management station to receive notifications e sec name The defined SNMP v3 user name that is to receive notifications version The SNMP version of notifications Currently only version 3 is supported in this command udp port The UDP port that is used on the receiving management station for notifications notification type The type of notification that is sent Currently only TRAP is supported Default Setting None Command Mode Global Configuration Command Usage e The access point supports up to 10 SNMP v3 target IDs e The SNMP v3 user name that is specified in the target must first be configured using the snmp server user command Example Outdoor lla Building to Building config snmp server targets mytraps 192 254 2 33 chris Outdoor lla Building to Building config snmp server filter This command configures SNMP v3 notification filters Use the no form to delete an SNMP v3 filter or remove a subtree from a filter Using the
254. vice on the wired network Target IP address Specifies the IP address of a host device in the wired network Enable Enables traffic between the host s IP address and the AP Ping Interval Specifies the time between each Ping sent to the link host Range 300 30000 milliseconds Default 30 milliseconds Number of Retries allowed Specifies the number of consecutive failed Ping counts before the link is determined as lost Range 1 30 Default 6 5 7 CHAPTER 5 SYSTEM CONFIGURATION RADIUS Remote Authentication Dial in User Service RADIUS is an authentication protocol that uses software running on a central server to control access to RADIUS aware devices on the network An authentication server contains a database of user credentials for each user that requires access to the network A primary RADIUS server must be specified for the access point to implement IEEE 802 1X network access control and Wi Fi Protected Access WPA wireless security A secondary RADIUS server may also be specified as a backup should the primary server fail or become inaccessible In addition the configured RADIUS server can also act as a RADIUS Accounting server and receive user session accounting information from the access point RADIUS Accounting can be used to provide valuable information on user activity in the network NOTE This guide assumes that you have already configured RADIUS server s to support the access point Configuration of RADIUS
255. vided with product Output Antenna O Both Left Right Transmission Power 100 Maximum Transmit Data Rate 54 Mbps Maximum Multicast Data Rate 6 Mbps Beacon Interval 20 1000 100 _ Milliseconds Delivery Traffic Indication Message DTIM 1 255 Beacons Fragment Length 256 2346 234 Bytes RTS Threshold 0 2347 2347 Bytes Country Code The current country code setting This setting restricts operation of the access point to radio channels and transmit power levels permitted for wireless networks in the specified country CHAPTER 5 SYSTEM CONFIGURATION il Description Adds a comment or description to the wireless interface Range 1 80 characters Turbo Mode The normal 802 1 1a wireless operation mode provides connections up to 54 Mbps Turbo Mode is an enhanced mode not regulated in IEEE 802 1 1a that provides a higher data rate of up to 108 Mbps Enabling Turbo Mode allows the access point to provide connections up to 108 Mbps Default Disabled NOTE In normal mode the access point provides a channel bandwidth of 20 MHz and supports the maximum number of channels permitted by local regulations e g 13 channels for the United States In Turbo Mode the channel bandwidth is increased to 40 MHz to support the increased data rate However this reduces the number of channels supported e g 5 channels for the United States i NOTE Check your country s regulations to see if Turbo Mod
256. wep Use WEP encryption for the multicast cipher TKIP or AES CCMP can be used for the unicast cipher depending on the capability of the client Default Setting wep Command Mode Interface Configuration Wireless VAP Command Usage e WPA enables the access point to support different unicast encryption keys for each client However the global encryption key for multicast and broadcast traffic must be the same for all clients e If any clients supported by the access point are not WPA enabled the cipher suite algorithm must be set to WEP e WEP is the first generation security protocol used to encrypt data crossing the wireless medium using a fairly short key Communicating devices must use the same WEP key to encrypt and decrypt radio signals WEP has many security flaws and is not recommended for transmitting highly sensitive data e TKIP provides data encryption enhancements including per packet key hashing i e changing the encryption key on each packet a message integrity check an extended initialization vector with sequencing rules 6 145 CHAPTER 6 COMMAND LINE INTERFACE and are keying mechanism Select TKIP if there are clients in the network that are not WPA2 compliant TKIP defends against attacks on WEP in which the unencrypted initialization vector in encrypted packets is used to calculate the WEP key TKIP changes the encryption key on each packet and rotates not just the unicast keys but the broadcast keys as we
257. wer over Ethernet PoE A specification for providing both power and data to low power network devices using a single Category 5 Ethernet cable PoE provides greater flexibility in the locating of access point s and network devices and significantly decreased installation costs Glossary 3 RADIUS A logon authentication protocol that uses software running on a central server to control access to the network Roaming A wireless LAN mobile user moves around an ESS and maintains a continuous connection to the infrastructure network RTS Threshold Transmitters contending for the medium may not be aware of each other RTS CTS mechanism can solve this Hidden Node Problem If the packet size is smaller than the preset RTS Threshold size the RTS CTS mechanism will NOT be enabled Service Set Identifier SSID An identifier that is attached to packets sent over the wireless LAN and functions as a password for joining a particular radio cell i e Basic Service Set BSS Session Key Session keys are unique to each client and are used to authenticate a client connection and correlate traffic passing between a specific client and the access point Shared Key A shared key can be used to authenticate each client attached to a wireless network Shared Key authentication must be used along with the 802 11 Wireless Equivalent Privacy algorithm Simple Network Management Protocol SNMP The application protocol in the Intern
258. wireless network After successful association to an access point a client is redirected to an access point login web page as soon as Internet access is attempted The client is then authenticated by entering a user name and password on the web page This process allows controlled access for clients without requiring 802 1X or MAC authentication Web redirect requires a RADIUS server on the wired network with configured user names and passwords for authentication The RADIUS server details must also be configured on the access point See show bootfile on page 65 e Use the show system command to display the current web redirect status Example Outdoor lla Building to Building config web redirect Outdoor lla Building to Building config Using the Command Line Interface APmgmtIP This command specifies the client IP addresses that are allowed management access to the access point through various protocols NOTE Secure Web HTTPS connections are not affected by the UI Management or IP Management settings Syntax APmgmtIP lt multiple P_address subnet_mask single P_address any gt e multiple Adds IP addresses within a specifiable range to the SNMP web and Telnet groups e single Adds an IP address to the SNMP web and Telnet groups e any Allows any IP address access through SNMP web and Telnet groups e P_address Adds IP addresses to the SNMP web and Telnet groups e subnet_mask Specifies a r
259. x address filter entry lt mac address gt lt allowed denied gt e mac address Physical address of client Enter six pairs of hexadecimal digits separated by hyphens e g 00O 90 D1 12 AB 89 e allowed Entry is allowed access e denied Entry is denied access 6 79 CHAPTER 6 COMMAND LINE INTERFACE Default None Command Mode Global Configuration Command Mode e The access point supports up to 1024 MAC addresses e An entry in the address table may be allowed or denied access depending on the global setting configured for the address entry default command Example Outdoor lla Building to Building config address filter entry 00 70 50 cc 99 la allowed Outdoor lla Building to Building config Related Commands address filter default 6 79 802 1x supplicant user 6 76 Using the Command Line Interface address filter delete This command deletes a MAC address from the filter table Syntax address filter delete lt mac address gt mac address Physical address of client Enter six pairs of hexadecimal digits separated by hyphens Default None Command Mode Global Configuration Example Outdoor lla Building to Building config address filter delete 00 70 50 cc 99 1b Outdoor lla Building to Building config Related Commands 802 1x supplicant user 6 76 mac authentication server This command sets address filtering to be performed with local or remote options Use the no form to disable
260. y network wide QoS policy WMM also specifies a protocol that access points can use to communicate the configured traffic priority levels to QoS enabled wireless clients Table 3 WMM Access Categories WMM Access Categories Access WMM de 802 1D Category Designation Description Tags Highest priority minimum delay AC_VO AC3 Voice Time sensitive data such as VolP Voice 7 6 over IP calls High priority minimum delay AC_VI AC2 Video Time sensitive data such as streaming 5 4 video Normal priority medium delay and throughput Data only affected by long 03 delays Data from applications or devices that lack QoS capabilities AC_BE ACO Best Effort Lowest priority Data with no delay or AC_BK AC1 Background throughput requirements such as bulk 2 1 data transfers WMM Operation WMM uses traffic priority based on the four ACs Voice Video Best Effort and Background The higher the AC priority the higher the probability that data is transmitted When the access point forwards traffic WMM adds data packets to four independent transmit queues one for each AC depending on the 802 1D priority tag of the packet Data packets without a priority tag are always added to the Best Effort AC queue From the four queues an internal virtual collision Radio Interface resolution mechanism first selects data with the highest priority to be granted a transmit opportunity Then the same collision resolution mechanism i
261. y Limit specifies the maximum time an AC transmit queue has access to the wireless medium When an AC queue is granted a transmit opportunity it can transmit data for a time up to the TxOpLimit This data bursting greatly improves the efficiency for high data rate traffic Range 0 65535 microseconds admission_control The admission control mode for the access category When enabled clients are blocked from using the access category Options O to disable 1 to enable 6 160 Default Using the Command Line Interface AP Parameters WMM Parameters ACO Best Effort AC1 Background AC2 Video AC3 Voice LogCwMin 4 4 3 2 LogCwMax 10 10 4 3 AIFS 3 7 2 2 TXOP Limit 0 0 94 47 Admission Control Disabled Disabled Disabled Disabled BSS Parameters WMM Parameters ACO Best Effort AC1 Background AC2 Video AC3 Voice LogCwMin 4 4 3 2 LogCwMax 6 10 4 3 AIFS 3 7 1 1 TXOP Limit 0 0 94 47 Admission Control Disabled Disabled Disabled Disabled Command Mode Interface Configuration Wireless Example Outdoor lla Building to Building if wireless a wmmparams ap 0 4 6311 Outdoor lla Building to Building if wireless a 6 161 CHAPTER 6 COMMAND LINE INTERFACE 6 162 A TROUBLESHOOTING Check the following items before you contact local Technical Support 1 If wireless bridge units do not associate with each other check the following Check the power injector LED for each bridge unit to be su
262. y authenticated its MAC address with the local database on the access point a localMacAddrAuthFail A client station has failed authentication with the local MAC address database on the access point a sntpServerFail The access point has failed to set the time from the configured SNTP server CONFIGURING SNMPv3 USERS The access point allows up to 10 SNMP v3 users to be configured Each user must be defined by a unique name assigned to one of three pre defined security groups and configured with specific authentication and encryption settings Figure 21 Configuring SNMPv3 Users SNMP Users User Group Auth Type Passphrase Priv Type Passphrase Action New User RO None None User List Groups GroupName SecuntyLevel VvnteView Action New Group noAthNoPnv nonam Add Group List D0 User The SNMPv3 user name 32 characters maximum Group The SNMPv3 group name Options RO RWAuth or RWPriv Default RO a RO Read only access a RWAuth Read write access with user authentication a RWPriv Read write access with both user authentication and data encryption Administration Auth Type The authentication type used for the SNMP user either MD5 or none When MDS is selected enter a password in the corresponding Passphrase field Priv Type The data encryption type used for the SNMP user either DES or none When DES is selected enter a key in the corresponding Passphrase field Passph
263. ype and use the wpa preshared key command to specify one static key e If WPA or WPA2 is used with pre shared key mode all wireless clients must be configured with the same pre shared key to communicate with the access point s VAP interface 6 147 CHAPTER 6 COMMAND LINE INTERFACE Example Outdoor lla Building to Building if wireless g VAP 0 wopa pre shared key ASCII agoodsecret Outdoor lla Building to Building if wireless g Related Commands auth 6 140 pmksa lifetime This command sets the time for aging out cached WPA2 Pairwise Master Key Security Association PMKSA information for fast roaming Syntax pmksa lifetime lt minutes gt minutes The time for aging out PMKSA information Range O 14400 minutes Default Setting 720 minutes Command Mode Interface Configuration Wireless VAP Command Usage e WPA2 provides fast roaming for authenticated clients by retaining keys and other security information in a cache so that if a client roams away from an access point and then returns reauthentication is not required e When a WPA2 client is first authenticated it receives a Pairwise Master Key PMK that is used to generate other keys for unicast data encryption This key and other client information form a Security Association that the access point names and holds in a cache The lifetime of this security association can be configured with this command When the lifetime expires the client security asso
264. ys 802 1X as its basic framework for user authentication and dynamic key management to provide an enhanced security solution for 802 11 wireless networks Wired Equivalent Privacy WEP WEP is based on the use of security keys and the popular RC4 encryption algorithm Wireless devices without a valid WEP key will be excluded from network traffic WPA Pre shared Key PSK PSK can be used for small office networks that may not have the resources to configure and maintain a RADIUS server WPA provides a simple operating mode that uses just a pre shared password for network access Glossary 5 Glossary 6 INDEX Numbers 802 119 6 112 A AES 5 58 authentication 5 10 cipher suite 6 141 closed system 6 127 configuring 5 10 MAC address 5 12 6 79 type 4 9 5 50 6 127 web redirect 5 14 6 22 B beacon interval 5 42 6 121 rate 5 42 6 122 BOOTP 6 107 6 108 BPDU 5 31 C cable assignments B 1 crossover B 4 straight through B 3 channel 6 116 Clear To Send See CTS CLI 6 1 command modes 6 5 closed system 5 39 6 126 command line interface See CLI community name configuring 6 46 community string 5 21 6 46 configuration settings saving or restoring 6 62 configuration initial setup 4 1 country code configuring 6 13 crossover cable B 4 CSMA CA 1 2 Index 7 CTS 5 43 6 124 D device status displaying 5 60 6 26 DHCP 4 8 5 5 5 6 5 7 6 107 6 108 DNS 5 6 6 106 Domain Name Server See D

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