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Spectrum24 AP-4121HR Access Point

1. 6 Spectrum24 AP 4121HR Access Point Product Reference Guide Introduction XK When using a wireless AP to AP connection use the optimal antenna Note configuration for the site For example use an omnidirectional antenna when establishing a dedicated wireless bridge or repeater e Awireless AP network is possible depending on the network bandwidth and configuration Each wireless AP can have connections with up to four other wireless APs Using more than two WLAPs to establish a connection slows network performance for all topologies To increase WLAP performance disable WNMP Functions and AP AP State Xchg parameters under the Set System Configuration screen To set up an AP for wireless operation automatically select the Enabled option for the WLAP Mode parameter To set these values see 2 5 Configuring Radio Parameters on page 58 eb The WLAP initialization process length depends on the time specified in Note the WLAP Forward Delay field See 2 5 Configuring Radio Parameters on page 58 Spectrum24 AP 4121HR Access Point Product Reference Guide 7 Introduction 1 2 2 Cellular Coverage The AP establishes an average communication range with MUs called a Basic Service Set BSS or cell When in a particular cell the MU associates and communicates with the AP of that cell Each cell has a Basic Service Set Identifier BSS_ID In IEEE 802 11 the AP MAC a
2. Wireless Wireless Wireless Wireless AP AP AP AP LI a AP LL a Internal AP Bridging Algorithm Filters Database Stack I b Ethernet PPP Radio 12 Spectrum24 AP 4121HR Access Point Product Reference Guide Introduction eb The AP internal stack interface handles all messages directed to the AP Note Each AP stores information on destinations and their interfaces to facilitate forwarding When a user sends an ARP Address Resolution Protocol request packet the AP forwards it over all enabled interfaces Ethernet PPP radio and WLAP except over the interface the ARP request packet was received On receiving the ARP response packet the AP database keeps a record of the destination address along with the receiving interface With this information the AP forwards any directed packet to the correct destination The AP forwards packets for unknown destinations to the Ethernet interface eb Transmitted ARP request packets echo back to other MUs Note The AP removes from its database destinations or interfaces not used for a specified time The AP refreshes its database when it transmits or receives data from these destinations and interfaces Filtering and Access Control The AP provides facilities to limit the MUs that associate with it and the data packets that can forward through it Filters provide network security or improve performance by eliminating broadcast multicast packets from the
3. sscecececsteseeecececuaeaeeececeeeaeaeees 86 2 8 4 Enable Disable the ACL ceeeececceneeeeeeceeecneeaeeeceseeneuaees 87 2 8 5 Removing All Allowed MUS c cccccssseeeecececaeeeeeeceseeneaaees 87 2 8 6 Load ACL from MU List cececceeecseeeeeteneeeeseseseeeseeeeeeeees 87 2 9 Configuring Address Filtering scseeececeeeeceeeceecececeeeeeeeaeaeaes 88 2 9 1 Adding Disallowed MUS cececcenneeeeecececaeeaeeeceeeeaeaaees 89 2 9 2 Removing Disallowed MUS ccecccssssececeeecaeeeeeeceeeeneeaens 89 2 10 Configuring Type Filtering sesceeeceeeeeeececececcececeeeeeeeaeaeaea 89 21 0 Adding Filter Ty Bes smsi ansent aata 89 2 10 2 Removing Filter Types ssssececccceacesececececaeeaeeeeeeeeaeaaees 89 2 10 3 Controlling Type Filters cs esececcesseseeeceeecaceaeeeeeeeeeenaens 90 Spectrum24 AP 4121HR Access Point Product Reference Guide 2 11 Clearing MUs from the AP ccccseeeceeeececeeeceeeeeeecececeeeeeenaeaeaea 90 2 12 Setting Logging Options eeeeseeececeeecceeneecceneeeeeeaneeeceneeeeeees 91 2 13 Manually Updating AP Firmware ccccccssseeeecececaeeeeeeeeeeeaeeaees 93 2413 T Update using TELR 3 4 scteess senses veeees a E N oases 93 2 13 2 Updating using XMOdeM cececceseeseeeceeecaeeaeeeeeeeeaeeaees 96 2 14 Auto Upgrade all APs Through Messaging ccesseeeeeeeceeeeeeeees 98 2 1 5 Performing Pings mro ead eeees
4. Select Known APs from the Main Menu to display Symbol Access Point Known Access Points Net_ID 161 MAC Address IP Address CH HST HSQ MUS KBIOS FW_Ver Away OO AG F8 8A 2F FF 111 111 12 62 3 D B2 D0 B8 S AD F8 8A 38 CD 111 111 12 63 6 4 a 1 585 18 OG AG F8 8A 38 49 111 111 12 64 11 R 4 g 01 86 31 Echo F1 Delete F2 Next F3 Previous F4 Exit ESC Spectrum24 AP 4121HR Access Point Product Reference Guide 117 Monitoring Statistics The AP displays for each known AP MAC Address the unique 48 bit hard coded Media Access Control address known as the devices station identifier IP Address the network assigned Internet Protocol address DS Channel The direct sequence channel used by the AP MUS The MUs associated with the AP KBIOS The data traffic handled by the AP in kilobytes in and out per second FW Ver the firmware version used by the specified AP Away Determines if the AP functions as a part of the network or away Away indicates the last known transmission took place 12 or more seconds 3 7 Ethernet Statistics The AP keeps Ethernet performance statistics including packet transmission and data retries until reset e Select Ethernet Statistics from the Main Menu to display Symbol Access Point Ethernet Statistics Packets Seen D Packets Sent 138 Packets Forwarded 5 Any Collisions Discarded NoMatch amp 1 Collisions D Discarded Forced amp Maximum Collisions 5 Discarded Buffer amp
5. Select Show Misc Statistics from the Main Menu to display Symbol Access Point Misc System Statistics WNMP Serial Por Echos 5 Number of Dialouts 5 ings 5 Dialout Failures g assthrough Echos 5 Number of Answers Current Call Time 5 SNMP Last Call Time 5 Requests D Traps 5 Mobile IP Agent Ad Sent g Filters Reg Request Rcvd 5 ACL Violations 5 Reg Reply Sent 7 Address ype 5 Per Channel Statistics Retry Histogram Refresh F1 Timed F2 Exit ESC WNMP statistics include Echoes echo requests received by the AP Pings ping requests received by the AP Passthrough Echoes echoes for MUs associated with the AP 126 Spectrum24 AP 4121HR Access Point Product Reference Guide Monitoring Statistics SNMP statistics include Requests configuration requests received from the SNMP manager Traps AP messages sent to the SNMP manager Filter statistics include ACL Violations attempts by MU not in ACL list to associate with this AP Address packets discarded by address filter Type packets discarded by type filter Modem statistics for the serial port include Number of dial out attempts by the AP Dialouts Dialout Failures dial out failures by the AP Number of answer attempts by the AP Answers Current Call Time current connection session length in seconds Last Call Time last connection session length in seconds Mobile IP statistics include Agent Ad Sent number of agent advertisements sent from the AP
6. Multicast Mask d 9 EDA hex Multicast Mask v 18 5E hex Beacon nterval 108 K us Accept Broadcast ESSID Disabled MU Ina ll pg 2 1 RTS Threshold CCA Mode Carrier Sense CCA Energy Threshold 68 OK CR C M M M M b s b s b s b s ivity Timeout 68 min Rate Control Optional Optional Optional Required 2347 bytes WLAP Mode Disabled WLAP Priority 800808 hex WLAP Manual BSS ID 28 08 08 08 00 080 WLAP Hello Time 28 WLAP Max Age 188 WLAP Forward Delay 5 WEP Privacy Disabled WEP Algorithm 4 bit shared Key Encryption Key ID 1 Encryption Key Maintenance Enable Strong Encryption Short RF Preamble Enabled Save F1 Save All APs F2 Cancel LESC The frequency of DTIM packets as a multiple of TIM packets Range 1 255 K RTS Threshold CCA Mode and CCA Energy Threshold are not user Note configurable parameters 58 Spectrum24 AP 4121HR Access Point Product Reference Guide Configuring the AP 2 Configure the settings as required DTIM Interval Configure DTIM packet frequency as a multiple of beacon packets The DTIM Interval indicates how many beacons equal one cycle Do not modify BC MC Q Max Determines the memory allocated for the queue used in the AP to temporarily hold broadcast multicast messages Unit measure is in packets and corresponds to maximum sized Ethernet packets The default is 12 Reassembly Sets the time in 8
7. Precqutlons 05 0 Aes celia aa ee ioe aa a es 133 4 2 Package ContentSe rss serie vedi Tae Tia E REEERE E E E 133 Aa REQUIFEMIG ITS oaa a A A a 134 4 3 1 Network Connection ssssssessesssssssesesessseereesssseseeessssseeeee 134 4 3 2 TOBase T UTP oe e e veces E E es 134 Spectrum24 AP 4121HR Access Point Product Reference Guide vii ASB SINGIS Cellas ocak ee HG A a cuted ee dete he cevoese amas E Nee oe 135 AAs Placing the AP x serana snara aig eive arsa aR AEOS RETNA 135 4 5 Power Opon Scirpe iaeiiai eiai eiii ein AENEA ATEAN AAAS 135 4 6 Mounting the AP ssis eara a 136 4 7 Connecting the Power Adapter sssssssessssseseeressessereeessseseeeresses 136 4 8 LED Indicators veri e erto ers raa TENEAN EER EA CEEA EEE EA E TEEKS 137 4 8 1 WLAP mode LED display neseessesessesssseesessssseseresssssreeee 138 4 9 Tro bl shootings iisu a E E E E EES 140 4 9 1 Ensure wired network is operating eessssesesessseseessessseeeee 140 4 10 Seting Up MUS isnon e aaia iasi a 141 Appendix A Specifications 1 556 2a scce csscesesssecsasssseeussaossaedsasatessececeasiaws odes A 1 Az Physical Characteristics a ieee iaeei arsar area EC eE aA R EEES A 1 Ac Radio CGharacteristieS eons eo e E A AS A 2 A 3 Network Characteristics ssassn as aiarar irnar sissa A 3 Appendix B Supported Modems ccccccesesceseseeseseeceseeeeseeeeseeeeaeeeaeeeaees B 1 Appendix C Customer Support cccccesssseseeseseetsesesere
8. WLAP forward delay 68 WLAP hello time 67 WLAP manual BSS ID 67 WLAP Max Age 67 WLAP mode 66 WLAP priority 66 configuring ACL 84 range of MUs 84 removing allowed MUs 86 configuring PPP 76 answering AP 78 establishing connection 77 initiating modem connection 79 originating AP 77 PPP Direct 76 PPP with modems 77 configuring SNMP agent WLAP connection change 83 configuring the SNMP agent 80 access cntrl violation 82 all traps 82 authentication failure 82 cold boot 82 DHCP change 83 radio restart 82 read write community 82 read only community 82 SNMP agent mode 82 trap host1 IP address 82 connecting power adapter 136 country code 53 coverage area 8 AP 8 Basic Service Set 8 BSS_ID 8 cell 8 MU 8 WLAP mode 6 customer support C 1 additional information C 2 international contacts C 2 North American contacts C 1 D data decryption 27 types of authentication 28 WEP algorithm 27 data encryption 27 AP 28 types of authentication 28 WEP algorithm 27 Delivery Traffic Indicator Map See DTIM DHCP Support AP 14 Mobile IP 15 DHCP support 14 dial up connection configuration 48 Index 4 Spectrum24 AP 4121HR Access Point Product Reference Guide digital data 3 disallowed address 13 access control 13 ACL 13 AP 13 disallowed MUs 89 DTIM AP 9 association process 9 root AP 9 electromagnetic waves 3 encryption 27 128 Bit 72 AO Bit 71 enable strong encryption 74 environment 3 ESSID 60 Ethernet inter
9. Electromagnetic Field Requirements e IEC 801 4 Electromagnetic Compatibility for Industrial Process Measurement and Control Equipment Part 4 Electrical Fast Transients Requirements e EN 60 950 Amd 1 Amd 2 Safety of Information Technology Equipment Including Electrical Business Equipment e EN 60 825 1 EN 60 825 Safety of Devices Containing Lasers D 2 Spectrum24 AP4121HR Access Point Product Reference Guide Regulatory Compliance RF Devices Symbol RF products are designed to be compliant with the rules and regulations in the locations into which they are sold and will be labeled as required The majority of Symbol RF devices are type approved and do not require the user to obtain license or authorization before using the equipment Any changes or modifications to Symbol Technologies equipment not expressly approved by Symbol Technologies could void the user s authority to operate the equipment Telephone Devices Modems United States If this product contains an internal modem it is compliant with Part 68 of the Federal Communications Commission Rules and Regulations and there will be a label on the product showing the FCC ID Number and the REN Ringer Equivalence Number The REN is used to determine the quantity of devices which maybe connected to the telephone line Excessive RENs on the telephone line may result in the device not ringing in response to an incoming call In most but not all areas the sum of the
10. If using telnet to connect to the AP through an Ethernet interface do not use the Use XMODEM to Update Access Point s Firmware option This option causes the AP to reset and look for the firmware file over the serial interface 10 Select Special Functions from the Main Menu 11 Select Use TFTP to Update Access Point s and press ENTER ogy 12 Are you sure Y N Type y ogy The Telnet session ends when the user answers y at the prompt The WIRED LAN ACTIVITY indicator on the AP does NOT flash To view the file transfer log switch to the TFTP application The AP resets when the file transfer and FLASH programming completes 13 Telnet to the AP using its IP address 14 At the prompt type the password Symbol The password is case sensitive The AP displays the Main Menu 15 Verify the accuracy of the version number on the System Summary screen 16 Press CTRL D to end Telnet session 17 Repeat process for other APs in the network Spectrum24 AP 4121HR Access Point Product Reference Guide 95 Configuring the AP 2 13 2 Updating using Xmodem The Xmodem upgrade method requires a direct connection between the AP and PC using a Null modem serial cable and using software like HyperTerminal for Windows 95 Xmodem supports file transfers between terminal emulation programs and the AP UI eb Xmodem transfers require more time than TFTP transfers Note To
11. MUs appear as peers as in any Ethernet environment 4 4 Placing the AP AP antenna coverage resembles lighting in that an area lit from far away might not be bright enough An area lit sharply minimizes coverage and creates dark areas where no light exists Even AP placement like even placement of a light bulb provides even efficient coverage Place an AP using the following guidelines e Install the AP as high as practical e Orient the AP vertically for best reception e Point the AP antenna downward if attaching the AP to the ceiling The AP 4121 HR dual antenna assembly provides diversity that can improve performance and signal reception Symbol continues to add antenna options for Spectrum24 devices Contact a Symbol sales representative for available antenna options 4 5 Power Options amp Note e Standard 24 volt 1 amp power Par Number 50 24000 024 supply 15 230VAC 50 60Hz e US line cord Part Number 23844 00 00 A Symbol BIAS T system can also be used to combine low voltage DC with Ethernet data in a single cable connecting to an access point For information on the BIAS T system go to www symbol com and search for the BIAS T low power distribution system Spectrum24 AP 4121HR Access Point Product Reference Guide 135 Hardware Installation 4 6 Mounting the AP The AP rests on a flat surface or attaches to a wall or any hard flat stable surface Use the standard mounting kit provided with th
12. Reg Request number of Mobile IP registration requests received Received Reg Reply Sent number of Mobile IP registration replies sent Select Refresh at the status display to update values manually Select Timed to automatically update this display every two seconds Press ESC to return to the previous menu Spectrum24 AP 4121HR Access Point Product Reference Guide 127 Monitoring Statistics 3 9 1 Analyzing Channel Use The AP keeps statistics for individual Channels frequencies These identify channels that have difficulty transmitting or receiving due to retries To view statistics for individual channels 1 Select Show Misc Statistics from the Main Menu 2 Select Per Channel Statistics to display Chnl Sent Revd Retry T 5 5 5 2 5 5 5 3 88 89 3 4 5 5 5 5 5 5 5 6 5 5 5 Ji 5 5 5 8 5 5 5 9 5 5 5 18 5 5 5 ll 5 5 5 Press any key to continue The display shows counters for the packets sent received and retries for each channel 3 Press any key to continue 128 Spectrum24 AP 4121HR Access Point Product Reference Guide Monitoring Statistics 3 9 2 Analyzing Retries The AP keeps statistics of packets with multiple retries Use these statistics to identify severe occurrences of retries Retries occur when the transmitting station fails to receive an acknowledgment for a transmitted packet This lack of acknowledgment can result from e two or more stations transmitting simultaneously and cau
13. Select the correct COM port along with the following parameters emulation ANSI baud rate 19200 bps data bits 8 stop bits 1 parity none flow control none There is no password requirement Press ESC to refresh the display The AP displays the Main Menu Exit the communication program to terminate the session Using a Dial Up Connection The AP supports a dial up connection to the UI This requires accessing the UI from Telnet or a direct serial connection and changing the serial port configuration Configure the AP for the following Enable serial port Set serial port for u1 Disable any modem connection Set AP to answer mode Configure these settings in the Set Serial Port Configuration screen within the UI See 2 2 3 Configuring for Dial Up to the Ul on page 48 Spectrum24 AP 4121HR Access Point Product Reference Guide Configuring the AP 2 1 4 Using a Web Browser Note Note A Web Browser is a program used to view Web documents or pages The browser retrieves the requested page interprets its text and displays the page properly formatted on a computer screen Using a Web Browser to gain access to the UI requires the workstation to have a TCP IP stack and access to a Web browser The remote station can be on the wired or wireless LAN The Web Browser Internet Explorer 4 0 or greater or Netscape requires JavaScript to gain access to the UI Setup Network Web Server Help File Access A network We
14. To install an AP 1 Enter Admin Mode 2 Select AP Installation from the Main Menu to display Symbol Access Point Access Point Installation Unit Name Symbol Access Point Additional Gateways IP Address 157 235 181 152 157 235 181 2 D D D D Gateway IP Address 157 235 181 1 D D D D D D D D Subnet Mask 2557255 255 8 D D D D D D D Net_ID ESS 181 D D D Antenna Selection Diversity On DHCP Enabled OK CR Save F1 Save ALL APs F2 Can el ESC Where Unit Name the AP name IP Address the network assigned Internet Protocol address of the AP Gateway IP Address IP address of a router the AP uses on the Ethernet default gateway 50 Spectrum24 AP 4121HR Access Point Product Reference Guide Configuring the AP Subnet Mask The first two sets of numbers specify the network domain the next set specifies the subset of hosts within a larger network and the final set specifies an individual computer These values help divide a network into subnetworks and simplify routing and data transmission The subnet mask defines the size of the subnet Net_ID ESS The unique 32 character alphanumeric case sensitive network identifier of the AP Antenna Selection Enables selection of antenna diversity Additional The IP address of the additional gateways used Gateways Access up to seven gateways DHCP Enables the DHCP client to automatically send a DHCP request every XX hours days to renew the IP address lease as
15. pings to evaluate signal strength between two stations The other station can exist on any AP interface go This ping operates at the MAC level and not at the ICMP Internet Control Note Message Protocol level No pings returned or fewer pings returned than sent can indicate a communication problem between the AP and the other station To ping another station 1 Select the Show Mobile Units screen from the Main Menu to display Symbol Access Point MAIN MENU Show System Summary AP Installation Show Interface Statistics Special Functions Show Forwarding Counts Set System Configuration Show Mobile Units Set RF Configuration Show Known APs Set Serial Port Configuration Show Ethernet Statistics Set Access Control List Show RF Statistics Set Address Filtering Show Misc Statistics Set Type Filtering Show Event History Set SNMP Configuration Enter Admin Mode Set Event Logging Configuration Regular Home Agent Foreign Agent Spectrum24 AP 4121HR Access Point Product Reference Guide 101 Configuring the AP 2 Select Regular from the Show Mobile Units screen to display Symbol Access Point OG AG F8 29 C9 E2 DD AD F8 18 4B AB OG aW F8 18 4A 13 OG A8 F8 18 3C 85 Information CR Mobile Units C R11 E P R11 PIRTI CRIT Echo F1 Timed F2 Next F3 Exit ESC Select TAB to highlight the MAC address of the station and press the F1 key to display the Echo Test screen Station Address Num
16. therefore prevents an MU from impersonating an authenticated MU 2 17 Saving the Configuration 104 The AP keeps only saved configuration changes after a reset To make configuration changes permanent save changes as needed To save all changes e Press F1 in the configuration screens displaying the Save option OR complete the following procedure Spectrum24 AP 4121HR Access Point Product Reference Guide Configuring the AP 1 Select Special Functions from the Main Menu to display Symbol Access Point Special Functions Menu Clear All Statistics Use TFTP to update Access Point s Clear MU Table Firmware HTML file BOTH Clear ACL Clear Address Filters Use XMODEM to update Access Point s Firmware HTML file BOTH Load ACL from MU List Use TFTP to update ALL Access Points odem Dialout Firmware HTML file odem Hangup Alter Filename s HELP URL TFTP Server DHCP Reset AP Firmware Filename dsap_fw bin HTML Filename dsap_htm bin Run MKK Tests HELP URL http 157 233 68 180 Spectrum24WebHel p TFTP Server 157 235 99 236 Restore Factory Config Save Configuration Save All APs Save Config to All APs Exit LESC 2 Select Save Configuration and press ENTER The Save a11 APs function saves only the five preceding items The function does not save other configuration parameters when selected Users can perform this option only among the same hardware platforms and firmware versions The
17. 008 00 08 08 DIS 1 80000GaGF88b7221 B0GOGVHaWF88b7221 8604 Refresh F1 Timed F2 Previous F4 Exit LESC Spectrum24 AP 4121HR Access Point Product Reference Guide 123 Monitoring Statistics Where Current WLAP Itf Current State Priority Root Interface Root Priority Root MAC Address Root Path Cost 124 Refers to the current Wireless AP interfaces in use in a 1 4 range On initialization the AP can be in any of the following states of wireless operation e starting the initializing process Initializing Sending Probe Send Assoc Req association request Send Cfg BPDU configuration Bridge Protocol Data Unit Wait for Probe Send Probe Rsp probe response Send Assoc Rsp association response Send Cfg Rsp configuration response Received Root Rsp Root response e operating in wireless mode Root WLAP lost Disabled Functional The 1 2 2 Cellular Coverage on page 8 provides an explanation of a Root AP States the WLAP priority value assigned to the AP under 2 5 Configuring Radio Parameters on page 58 States the interface leading to the Root AP States the priority value of the Root AP States the MAC address of the Root AP Indicates the hops between the current WLAP and the Root AP Spectrum24 AP 4121HR Access Point Product Reference Guide Itf ID WLAP Itf MAC Addr ltf State Path Cost Designated Root ID Designated Cost Designate
18. 111 111 12 169 n elnet Session End U Assoc A0 F8 12 59 E8 U Assoc A F8 12 59 9B U Assoc A0 F8 12 5A 85 elnet Session Start From 111 111 12 169 LAP Assoc Q6 A F8 8A 38 77 U Assoc 86 A8 F8 12 59 C3 RF Initialized SI Ethernet Initialized ultitasker Initialized AP Driver Initialized Event Log Initialized Next CF4 Exit ESC Spectrum24 AP 4121HR Access Point Product Reference Guide Monitoring Statistics 3 11 Clearing Statistics To clear statistics 1 Select Special Functions from the Main Menu 2 Select Clear All Statistics The AP zeroes all statistics eb Resetting the AP also clears statistics Note Spectrum24 AP 4121HR Access Point Product Reference Guide 131 Monitoring Statistics 132 Spectrum24 AP 4121HR Access Point Product Reference Guide Chapter 4 Hardware Installation AP installation includes connecting the AP to the wired network AP placement and power up Installation procedures vary for different environments 4 1 Precautions Before installing the AP verify the following e Do not install in wet or dusty areas without additional protection Contact a Symbol representative for more information e Verify the environment has a temperature range between 20 C to 55 C e If attaching to a wired Ethernet keep AP on the same subnet 4 2 Package Contents Check package contents for AP e power adapter eb Contact the
19. 5 ms units before a time out timeout occurs during a packet reassembly Packet reassembly occurs when a large RF packet is fragmented into smaller wireless network packets The default is 9889 Max Retries d The maximum allowed retries before aborting a single data packet transmission The default is 15 Users should not modify Max Retries v The maximum allowed retries before aborting a single voice packet transmission The default is 5 Do not modify Multicast Mask d Supports broadcast download protocols for any MU typically Point of Sale terminals requiring the expedited download of a new operating image over the network instead of using a local nonvolatile drive All multicast downstream data packets that match the top 32 bits of the multicast mask are forwarded immediately instead of being queued for transmission at the next DTIM interval Multicast Mask v Supports broadcast or party line voice communications All multicast downstream data packets that match the top 32 bits of the multicast mask are forwarded immediately instead of being queued for transmission at the next DTIM interval Spectrum24 AP 4121HR Access Point Product Reference Guide 59 Configuring the AP 60 Beacon Interval Accept Broadcast ESSID MU inactivity Timeout The time between beacons in Kilo microseconds The default is 100 Avoid changing this parameter because it can adversely affect PSP mode terminal performance Allows the
20. 805 4 736 095 4 758 717 816 660 4 845 350 4 896 026 4 897 532 4 923 281 4 933 538 4 992 717 5 015 833 5 017 765 5 021 641 5 029 183 5 047 617 5 103 461 5 113 445 5 130 520 5 140 144 5 142 550 5 149 950 5 157 687 5 168 148 5 168 149 5 180 904 5 216 232 5 229 591 5 230 088 5 235 167 5 243 655 5 247 162 5 250 791 5 250 792 5 260 553 5 262 627 5 262 628 5 266 787 5 278 398 5 280 162 5 280 163 5 280 164 5 280 498 5 304 786 5 304 788 5 306 900 5 321 246 5 324 924 5 337 361 5 367 151 5 373 148 5 378 882 5 396 053 5 396 055 5 399 846 5 408 081 5 410 139 5 410 140 5 412 198 5 418 812 5 420 411 5 436 440 5 444 231 5 449 891 5 449 893 5 468 949 5 471 042 5 478 998 5 479 000 5 479 002 5 479 441 5 504 322 5 519 577 5 528 621 5 532 469 5 543 610 5 545 889 5 552 592 5 557 093 5 578 810 5 581 070 5 589 679 5 589 680 5 608 202 5 612 531 5 619 028 5 627 359 5 637 852 5 664 229 5 668 803 5 675 139 5 693 929 5 698 835 5 705 800 5 714 746 5 723 851 5 734 152 5 734 153 5 742 043 5 745 794 5 754 587 5 762 516 5 763 863 5 767 500 5 789 728 5 789 731 5 808 287 5 811 785 5 811 787 5 815 811 5 821 519 5 821 520 5 823 812 5 828 050 5 850 078 5 861 615 5 874 720 5 875 415 5 900 617 5 902 989 5 907 146 5 912 450 5 914 478 5 917 173 5 920 059 5 923 025 5 929 420 5 945 658 5 945 659 5 946 194 5 959 285 6 002 918 D305 885 D341 584 D344 501 D359 483 D362 453 D36
21. Enabled Telnet Logins Enabled System Events Enabled Ethernet Events Disabled OK CR Save F1 Save ALL APs F2 Cancel ESC Spectrum24 AP 4121HR Access Point Product Reference Guide 91 Configuring the AP 2 Set Any Event Logging to Enabled to log all events Specify the events 92 that do not require logging when disabling Any Event Logging Use SPACE BAR or LEFT RIGHT ARROW keys to toggle between Enabled and Disabled Any Event Logs all events listed in the screen Logging Security ACL filter or administrative password access violations Violations MU State Allows logging all MU state changes Changes WNMP Events WNMP events such as MUs using WNMP Serial Port Events Serial port activity AP AP Msgs AP to AP communication Telnet Logins Telnet sessions for monitoring and administration System Events Internal use only Ethernet Events Events such as packet transmissions and errors Verify the values reflect the network environment Change them as needed Select 0K or Save to register settings by writing changes to NVM Selecting Save displays a confirmation prompt Select Save ALL APs F2 to save the Event Logging Configuration information to all APs with the same Net_ID ESS This option saves the configuration changes for the current AP and sends two WNMP messages to all other APs on the Known APs table to update their configuration and reset after the configuration has been modified Users can perf
22. NVRAM stores saved configuration information To clear the NVRAM stored configuration see 2 19 Restoring the Factory Configuration on page 106 Spectrum24 AP 4121HR Access Point Product Reference Guide 105 Configuring the AP 2 18 Resetting the AP Resetting an AP clears statistics and restores the last saved configuration If users make unsaved changes the AP clears those changes and restores the last saved configuration on reset e Select Special Functions from the Main Menu e Select Reset AP The AP flashes its LEDs as if powering up and returns to a STATUS flashing state 2 19 Restoring the Factory Configuration Note 106 If the AP fails to communicate due to improper settings restore the factory configuration defaults Restoring configuration settings clears all configuration and statistics for the AP depending on the DHCP setting DHCP Disabled all AP configuration and statistics are reset except the AP Installation screen DHCP Enabled all AP configuration and statistics are reset To restore factory configuration 1 Select Special Functions from the Main Menu 2 Select Restore Factory Configuration The AP erases all configuration information and replaces it with the factory configuration When the factory configuration is restored the ACL list is not erased Spectrum24 AP 4121HR Access Point Product Reference Guide Chapter3 Monitoring Statistics The AP keeps statistics of its transactions du
23. SPACE BAR to toggle between the Forward Discard or Disable type filtering and press ENTER to confirm the choice Select Save ALL APs F2 to save the Type Filtering Setup information to all APs with the same Net_ID ESS Users can perform this option only among the same hardware platforms and firmware versions eb Users can only enable one type filtering option at a time Note 2 11 Clearing MUs from the AP Clear the MU association table for diagnostic purposes Clear MUs from the AP if the AP has many MU associations no longer in use Use this option to ensure that MUs associating with the AP are active To clear MUs associated with the AP l 2 90 Select Special Functions from the Main Menu Select Clear MU Table The AP removes the MUs associated with it MUs cleared from the AP try to reassociate with the AP or another nearby AP Spectrum24 AP 4121HR Access Point Product Reference Guide 2 12 Setting Logging Options Configuring the AP The event log kept by the AP depends on settings for logging options This allows the administrator to log important events This option keeps the log concise through the 128 entry circular buffer 1 Select Set Event Logging Configuration from the Main Menu to display Symbol Access Point Event Logging Configuration Any Event Logging Enabled Security Violations Enabled MU State Changes Enabled WNMP Events Disabled Serial Port Events Enabled AP AP Msgs
24. Spectrum24 AP 4121HR Access Point Product Reference Guide Appendix D Regulatory Compliance To comply with U S and international regulatory requirements the following information has been included The document applies to the complete line of Symbol products Some of the labels shown and statements applicable to other devices might not apply to all products Radio Frequency Interference Requirements This device has been tested and found to comply with the limits for a Class A digital device pursuant to Part 15 of the Federal Communications Commissions Rules and Regulation These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment This equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with the instruction manual may cause harmful interference to radio communications Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required to correct the interference at his own expense However there is no guarantee that interference will not occur in a particular installation If the equipment does cause harmful interference to radio or television reception which can be determined by turning the equipment off and on the user is encouraged to try to correct the interference by one or more of the following measures e Reorient or rel
25. a transmitted data stream to produce the AP output signal Direct Sequence Is 2 4 GHz Band gt a LITI Channel e lt 10011101011101 Data Stream Chipping Sequence Only 3 non overlapping Channels of Direct Sequence information fit into defined 2 4 GHz band K In the United States the three non overlapping direct sequence channels Nats are channels 1 6 and 11 20 Spectrum24 AP 4121HR Access Point Product Reference Guide Introduction Mobile Units receiving a direct sequence transmission use the spreading code to map the chips within the chipping sequence back into bits to recreate the original data transmitted by the access point Intercepting and decoding a direct sequence transmission requires a predefined algorithm to associate the spreading code used by the transmitting access point to the receiving MU This algorithm is established when the access point and MU are configured The bit redundancy within the chipping sequence enables the receiving MU to recreate the original data pattern even if bits in the chipping sequence are corrupted by interference The ratio of chips per bit is called the spreading ratio A high spreading ratio increases the resistance of the signal to interference A low spreading ratio increases the bandwidth available to the user The access point uses two chips per bit among three channels within the 2 4 GHz band in a pattern avoiding any 1 or 2 Mbps systems opera
26. long as the AP is running 3 Verify the AP parameters reflect the network environment Change them as needed 4 Inthe Antenna Selection field use the SPACE BAR or LEFT RIGHT ARROW keys to toggle between Primary Only and Diversity On 5 Select 0k or Save to register settings by writing changes to NVM Selecting Save displays a confirmation prompt 6 Select Save ALL APs F2 to save the AP installation configuration information to all APs with the same Net_ID ESS This option saves the configuration changes for the current AP on the Known APs table to update their configuration and reset after the configuration has been modified Users can perform this option only among the same hardware platforms and same firmware versions 7 Select Cancel CESC to disregard any changes made to this screen and return to the previous menu Spectrum24 AP 4121HR Access Point Product Reference Guide 51 Configuring the AP 2 4 Configuring System Parameters The AP provides configuration options for how the unit operates including security access and interface control Some parameters do not require modification 1 Select Set System Configuration from the Main Menu to display Symbol Access Point System Configuration Channel 3 Access Control Type Filtering Ethernet Timeout 5 WNMP Functions Telnet Logins Enabled AP AP State Xchg Encryption Admin Any Ethernet Interface PPP Interface Agent Ad Interval RF Interface S24 M
27. radio network The ACL Access Control List contains MAC addresses for MUs allowed to associate with the AP This provides security by preventing unauthorized access The AP uses a disallowed address list of destinations This feature prevents the AP from communicating with specified destinations This can include network devices that do not require communication with the AP or its MUs Spectrum24 AP 4121HR Access Point Product Reference Guide 13 Introduction Depending on the setting the AP can keep a list of frame types that it forwards or discards The Type Filtering option prevents specific frames indicated by the 16 bit DIX Ethernet Type field from being processed by the AP These include certain broadcast frames from devices unimportant to the wireless LAN but take up bandwidth Filtering out unnecessary frames can also improve performance 1 3 2 Auto Fallback to Wireless Mode The AP supports an Auto Fallback to Wireless when the hardware Ethernet connection fails or becomes broken The Auto Fallback function operates only with an AP in WLAP Mode and connected to the Ethernet network The AP resets itself and during initialization attempts to associate with any other WLAP in the network See 2 4 Configuring System Parameters on page 52 and 2 5 1 Wireless Operation Parameters on page 64 eb To make this feature available set the WLAP Mode to Link Required Note 1 3 3 DHCP Support The AP uses Dynamic Host Config
28. sede teed T A S tebe 101 2 16 Mobile IP Using MD5 Authentication sseeeceeececneeeeeeeeeeeeees 104 2 17 Saving the Configuration c sssseseeeececeeeeeeceeeeeeecececeeeeeeeaeaes 104 2 18 Resetting the AP cscs ends cede Saetead aeo ER Ea ASS EAS osi 106 2 19 Restoring the Factory Configuration ccceeeeecececeecececeeeeeeeaeaes 106 Chapter 3 Monitoring Statistics cccccceeeeseeeeeeseteeseseseeeeeeseeeeeseseneneeeees 107 3 1 SysteM SUMMAT ssecescseciccisssesssactescdaatescsacdesctasdecsaasdeccsavescsadteess 107 3 2 Interface Statistics icisivisseseveccssveceedacecc can cueccsaaececdaaaccuaaadscdaseesensss 110 3 3 Forwarding COUNTS vol i0 sheds veleeds tutes EO tw a O ating a ees 111 E Reo CROINN CEEE E E Sats cddient codeses seas 112 39 Mobile Pir erme as e sera a E EAE NE V E ak 116 B20 KTHOWN APS oarn a a E a A E codes A A S 117 3 7 Ethernet Statistics seiu a a a e a Ea 118 3 8 Radio Statistics reyes ny soio vescaswecscecvuvsceavecgecuvevessiveveccnneseuedee dents 120 3 9 Miscellaneous Statistics ai a aeaea aeaiee sees iarsa EAE aeii 126 3 9 1 Analyzing Channel Use ecceccccseeeeceececeaeseeeeceeeeaeeeees 128 329 2 Analyzing REESE e eTA A A S AA ATO 129 J10 Event HIStory orrssiiisirin ssar dasatescdaaes casaceccdaveecsaasueccsaatecsaaeeess 130 311 Clearing Statistics cccess aiet air EAEEREN EAEE 131 Chapter 4 Hardware Installation cccccceceeeeeseteeseseseeeeseseseeeeeeseneneeeees 133 A
29. the AP inoperable 13 From the emulation program menu bar select Transfer 14 Select the Send File command 15 Select the Browse button and locate the file s DSAP_FW BIN and DSAP_HTM BIN 16 Select the XModem protocol from the drop down list 17 Click Send Spectrum24 AP 4121HR Access Point Product Reference Guide 97 Configuring the AP 18 The terminal or PC displays the transfer process through a progress bar 19 If downloading both the firmware and HTML files the screen flashes Downloading HTML file using XMODEM Send HTML file with XMODEM now If downloading both files repeat the steps beginning at step 13 to download the next file and avoid a transfer time out error If not continue to step 20 20 The download is complete when the UI displays Download Successful Updating AP Update Successful If the firmware update fails the Ul displays an error code indicating the cause The AP automatically resets after all file transfers are completed e Exit the communication program to terminate the session e Repeat this process for other APs in the network 2 14 Auto Upgrade all APs Through Messaging 98 The Update ALL Access Points option upgrades or downgrades the firmware of all associated APs with the same Net_ID ESS on the same subnet and includes all recognized hardware platforms regardless of firmware version The initiating AP sends the correct file name for each Symbol platform The
30. to open the Directories window 12 13 Type the Directory Folder path of the directory created in step one Select the Virtual Directory button Type a folder alias such as WebHelp and select OK 15 16 17 18 Select the Enable Default Document checkbox Type S24apHelp htm as the default document and select Apply Select OK to exit the window Test the accessibility to the Help file using a Web browser with a URL similar to http xxx xxx xxx xxx WebHelp Where xxx xxx xxx xxx is IP address of the server Spectrum24 AP 4121HR Access Point Product Reference Guide Configuring the AP Accessing Web Browser UI Using a Web Browser to gain access to the UI requires the workstation to have a TCP IP stack and access to a Web browser The remote station can be on the wired or wireless LAN Ensure the Web Server option is enabled for the AP 1 Access the UI using a Serial or Telnet connection 2 Select the System Configuration screen 3 Verify the Web Server option on the System Configuration screen is enabled 4 Select Save F1 to save the configuration Reset the AP for changes to take effect 1 Select the Special Functions screen 2 Select Reset AP 3 Select yes at the confirmation prompt To enable Help file access change the Help URL parameter 1 Select the Special Functions screen 2 Use the TAB or UP DOWN ARROW key to select the Alter Filename s HELP URL TFTP Server DHCP Press ENTER 4 U
31. 0 CCA Mode 61 configuration 7 configure 58 data transmission rate 61 DTIM interval 59 Enable Strong Encryption 62 Encryption Key ID 62 Encryption Key Maintenance 62 max retries 59 multicast mask 59 RTS threshold 61 Short RF Preamble 63 WEP Privacy 61 WEP Algorithm 62 radio performance statistics 121 packets reassembled 121 packets received 121 packets transmitted 121 retries 121 radio statistics 120 AP 120 viewing 120 rate control 61 repeater AP 6 coverage area 6 WLAP mode 6 roaming across routers 24 AP 25 home agent 25 IP address 24 Spectrum24 AP 4121HR Access Point Product Reference Guide Index 7 Mobile IP 23 MU 25 TIM 26 root AP association process 9 Bridge Protocol Data Unit 9 DTIM 9 TIM9 WLAP mode 9 S security 27 decryption 27 encryption 27 WEP algorithm 27 Site 11 site survey 11 antenna coverage 135 AP 135 floor plan 11 hardware installation 133 site topography 10 AP 10 MU 10 signal loss 10 SNMP 29 agent 29 configurtion 29 support 30 trap 29 Spectrum24 1 introduction 1 management options 29 network topologies 3 radio basics 3 regulatory requirements 2 Index 8 wireless network 1 spread spectrum 2 4GHz 1 2 5GHz 1 statistics 107 ethernet 118 filter 127 forwarding counts 111 interface statistics 110 IP address 118 known APs 117 Mobile IP 116 modem 127 RF Statistics 120 SNMP 127 WNMP 126 Strong Encryption 74 system parameters 52 access control 54 Admin P
32. 3 700 D363 918 D370 478 D383 124 D391 250 D405 077 D406 581 D414 171 D414 172 D419 548 Invention No 55 358 62 539 69 060 69 187 Taiwan No 1 601 796 1 907 875 1 955 269 Japan European Patent 367 299 414 281 367 300 367 298 UK 2 072 832 France 81 03938 Italy 1 138 713 Symbol Technologies Inc One Symbol Plaza Holtsville N Y 11742 1300 Telephone 800 SCAN234 516 738 2400 TLX 6711519 www symbol com ii Spectrum24 AP 4121HR Access Point Product Reference Guide About This Document Reference Documents This reference guide refers to the following documents Part Number 70E 20706 02 70E 20709 02 70E 20708 02 Conventions Document Title Wireless LAN Adapter Models LA 4121 PC Card amp LA 4123 PCI Adapter Product Reference Guide Spectrum24 Plus Pack Users Guide Spectrum 24 Site Survey System Administrators Guide Keystrokes are indicated as follows ENTER FUNC CTRL C Press A B Hold A B identifies a key identifies a key sequence Press and release each key in turn press the indicated keys simultaneously press and hold the indicated keys while performing or waiting for another function Used in combination with another keystroke Typeface conventions used include lt angles gt brackets GUI Screen text Italics Screen indicates mandatory parameters in syntax for command line indicates available parameters in configuration files brackets act as separators
33. 8 FF FF 89 Add F2 Next F3 Save All APs F3 EXit CESC Spectrum24 AP 4121HR Access Point Product Reference Guide Configuring the AP 2 9 1 Adding Disallowed MUs The Disallowed Addresses screen provides a facility to add MUs to the list 1 Select Add F2 The AP prompts for a MAC address BO 08 00 00 DD 88 2 Enter the MAC address XK Users can enter MAC addresses without colons Note 2 9 2 Removing Disallowed MUs The Disallowed Addresses screen provides a facility to remove MUs from the list 1 Highlight the MAC address using the UP DOWN ARROW keys 2 Select Delete F1 to delete the MAC address 2 10 Configuring Type Filtering Packet types supported for the type filtering function include the 16 bit DIX Ethernet types The list can include up to 16 types 2 10 1 Adding Filter Types The Type Filtering screen provides a facility to add types to the list 1 Select Add F2 2 Enter the packet type 2 10 2 Removing Filter Types The Type Filtering screen provides a facility to remove types from the list 1 Highlight the packet type using the UP DOWN ARROW keys 2 Select Delete Spectrum24 AP 4121HR Access Point Product Reference Guide 89 Configuring the AP 2 10 3 Controlling Type Filters Set the type filters to forward or discard the types listed To control the type filtering mode 1 2 3 Select Set System Configuration from the Main Menu Select Type Filtering Press the
34. A network using a data link bridge provides radio coverage by using a remote AP in a location geographically distant from the AP connected to the Ethernet network The remote AP cannot provide an Ethernet connection to other APs MUs associating with the remote AP transmit and receive from the Ethernet network through the PPP link Ethernet 16 Spectrum24 AP 4121HR Access Point Product Reference Guide Introduction e Internet Protocol bridging between an AP and a computer To establish an Internet Protocol bridge with an AP ensure the computer includes the appropriate Telnet software with PPP and TCP IP protocols Using Telnet a remote computer can connect to any AP on an Ethernet network as long as data transfers through IP packets n PPP Link e Serial Ethernet L _Modem PPP Link L L Modem A PPP link provides the option of using a direct serial link or modem to extend wired Ethernet topologies Once in PPP mode the AP automatically attempts to communicate with the other device using the Data Link Bridging DLB protocol An AP using DLB communicates on the MAC level and receives and transmits Ethernet frames If the other device does not support DLB the AP attempts to communicate using Internet Protocol C
35. AP 4121HR Access Point Product Reference Guide Configuring the AP 2 Change the passwords using the following parameters User Password Allows the user to only monitor or view the screens Select any alphanumeric case sensitive entry up to 13 characters the characters selected are displayed as asterisks The default password is Symbol Admin Allows the user to view and change the parameters Password on each screen Select any alphanumeric case sensitive entry up to 13 characters the characters selected are displayed as asterisks Changing this password changes the Read Write Community password set in the SNMP Configuration screen The default password is Symbol 3 Select Save to register settings by writing changes to NVM Selecting Save displays a confirmation prompt 4 Select Cance1 ESC to disregard any changes made to this screen and return to the previous menu Spectrum24 AP 4121HR Access Point Product Reference Guide 57 Configuring the AP 2 5 Configuring Radio Parameters The AP automatically configures most radio parameters Only advanced users Symbol trained users or Symbol representatives should adjust the radio parameters for the AP Options in the RF Configuration screen fine tune the radio and WLAP functions 1 Select Set RF Configuration from the Main Menu to display Symbol Access Point RF Configuration DTIM Interval 18 BC MC Q Max 18 Reassembly timeout DAA Max Retries 15 Max Retries 5
36. AP to respond to any station sending probe packets with the industry standard broadcast ESS If Enabled this feature allows industry standard devices interoperability The AP probe response includes the ESS and information about the network By default this feature is Disabled and the AP responds only to stations that know the ESSID This helps preserve network security MUs require using Broadcast ESS to use this function Allows industry standard device interoperability by specifying the time the AP allows for MU inactivity A Spectrum24 AP recognizes MU activity through data packet transmission and reception and through scanning Spectrum24 MUs conduct active scanning Other industry standard MUs might conduct passive scans and a Spectrum24 AP can classify them as inactive Spectrum24 AP 4121HR Access Point Product Reference Guide Configuring the AP Rate Control Defines the data transmission rate the defaults are e 11 Mbps Optional e 5 5 Mbps Optional e 2Mbps Optional e 1Mbps Required The defaults allow the AP to automatically select the the best transmit rate allowed by the conditions These settings allow a mixture of 1 Mbps 2 Mbps 5 5 Mbps and 11 Mbps radios in the same network Any combination of the data rates can be selected as Optional Required or Not Used but it is essential to set the lowest selected rate to Required All IEEE 802 11 broadcast and management frames are sent out on the lowest req
37. Community ERRERA All Traps Disabled Generic Traps Cold Boot Disabled Authentication failure Disabled Enterprise Specific Traps Radio Restart Disabled Access Cntr Violation Disabled DHCP Change Disabled WLAP Connection Change Disabled OK CR Save F1 Save All APs F2 Cancel ESC Use the space bar or left right cursor keys to change Spectrum24 AP 4121HR Access Point Product Reference Guide 81 Configuring the AP 82 SNMP Agent Mode Read Only Community Read Write Community All Traps Cold Boot Authentication failure Radio Restart Access Cntrl Violation Trap Hostl IP Address Trap Host2 IP Address 2 Configure the settings as required Defines the SNMP agent mode Disabled disables SNMP functions Read only allows get and trap operations Read Write default allows get set and trap operations User defined password string up to 31 characters identifying users with read only privileges User defined password up to 13 characters for users with read write privileges Ensure the password used matches the Admin Password used to gain access to the System Password Administration screen Enables or disables all trap operations The default value is Disabled Send a trap to the manager when the AP cold boots The default value is Disabled Indicates that community strings other than those specified for the Read Only and Read Write Community were submitted The default
38. Configuring System Parameters on page 52 Spectrum24 AP 4121HR Access Point Product Reference Guide Introduction The scanning and association process continues for active MUs This allows the MUs to find new APs and discard out of range or deactivated APs By testing the airwaves the MUs can choose the best network connection available The following diagram illustrates Mobile IP roaming across routers Host Router Router Host ose T a o T f lt Internet OHH Nc Ethernet Ethernet Mobile Node Mobile Node K Set the MU for Mobile IP as specified in the MU user documentation Note Security has become a concern to mobile users Enabling the Mobile Home MD5 key option in the System Configuration menu generates a 16 byte checksum authenticator using an MD5 algorithm The MU and AP share the checksum called a key to authenticate transmitted messages between them The AP and MU share the key while the MU is visiting a foreign subnet The MU and AP have to use the same key If not the AP refuses to become the Home Agent for the MU The maximum key length is 13 characters The AP allows all printable characters Spectrum24 AP 4121HR Access Point Product Reference Guide 25 Introduction 1 3 9 Supporting CAM and PSP Stations 26 CAM Continuously Aware Mode sta
39. D forces the current AP to associate only with that WLAP If setting the WLAP Manual BSS_ID to the current BSS_ID the current AP jumps into Functional State immediately and waits for an Association Request from the other WLAP See 3 8 Radio Statistics on page 120 This feature speeds up the association process and minimizes confusion when more than two WLAPs try to associate with each other WLAP Hello Time Sets the time lapse in seconds between Config BPDU packets sent to the Root AP by a designated WLAP The default is 28 seconds If the Root AP fails to hear from the designated WLAP within the WLAP Max Age time it removes the designated WLAP from its interface table The WLAP Hello Time of the Root AP overwrites the WLAP Hello Time of designated WLAPs The WLAP Hello Time does not refer to the time lapse between beacons sent by the Root AP If a designated WLAP fails to receive a beacon it knows that its Root AP has lost the Root status WLAP Max Age Defines time in seconds before discarding aged configuration messages This causes a disconnection between the two WLAPs The recommended value is a multiple of the WLAP Hello Time The default is 18 seconds The WLAP Max Age of the Root AP overwrites the WLAP Max Age of designated WLAPs Spectrum24 AP 4121HR Access Point Product Reference Guide 67 Configuring the AP WLAP Forward Specifies the time in seconds to prevent an AP Delay from forwarding data packets to and fr
40. Late Collisions 5 Discarded CRC a Defers 5 Broadcast Multicast Individual Address 5 Refresh F1 Timed F2 Exit ESC 118 Spectrum24 AP 4121HR Access Point Product Reference Guide Monitoring Statistics Packet display for Ethernet statistical units Packets Seen Packets Forwarded Discarded NoMatch Discarded Forced Discarded Buffer Discarded CRC Broadcast Multicast Individual Address Packets Sent Any Collision 1 Collisions Maximum Collisions Late Collisions Defers packets received on Ethernet interface packets forwarded from Ethernet interface to other interfaces packets discarded because of unknown destinations destinations not in the known list of database entries packets discarded because of the applied address filters packets discarded because insufficient buffers in AP packets discarded because of data errors total broadcast or multicast packets received packets received with designated individual addresses total packets sent out packets affected by at least one collision packets affected by more than one collision packets affected by the maximum number of collision collisions occurring after the first 64 bytes the times the AP had to defer transmit requests on the Ethernet because of a busy medium Select Refresh at the status display to update values manually Select Timed to automatically update this display every two seconds Press ESC to return to the previous menu
41. MP Configuration Enter Admin Mode Set Event Logging Configuration Ifthe session is idle e g no input for the configured time the session terminates Press CTRL D to manually terminate the session Set the System Passwords in the Set System Configuration screen 34 Spectrum24 AP 4121HR Access Point Product Reference Guide Configuring the AP 2 1 2 Using a Direct Serial Connection The AP serial port is a DB 9 9 pin male connector The serial port allows PPP connections to another AP or a UI connection to a configuration PC Connecting the AP directly to a PC with a 9 pin serial port requires a null modem cable with the following configuration AP DTE PC DTE DB 9 Female DB 9 Female 2 3 3 2 1 4 i 6 4 6 7 8 8 7 5 5 The factory configured AP accepts a direct serial connection to the UI Configure the AP for the following e Enable serial port e Set Port Use to u1 e Disable modem connection eb Configure these settings in the Set Serial Port Configuration screen within the Note UI See 2 2 3 Configuring for Dial Up to the UI on page 48 Spectrum24 AP 4121HR Access Point Product Reference Guide 35 Configuring the AP 2 1 3 36 Assuming the Ul and serial port are enabled on the AP k Attach a null modem serial cable from the AP to the terminal or PC serial port From the terminal start the communication program such as HyperTerminal for windows
42. NTER to confirm 2 6 3 PPP with Modems The PPP interface provides a connection using modems over a telephone line Connect modems to the APs with straight through serial cables Designate one AP as the Originating AP and the other as the Answering AP Configure the Originating AP with dial out information to the answering AP The answering AP waits for the originating AP to dial into it See Appendix B Supported Modems for modems supported by the AP Dial out manually through the Special Functions menu or dial out automatically on boot 2 6 4 Originating AP From the originating APs UI 1 2 3 A 5 Select Set Serial Port Configuration from the Main Menu Set the Port Use parameter to PPP Set the Modem Connected parameter to Yes Set the Connect Mode to Originate Select Dialout Number and type the dial out telephone number of the answering AP maximum 31 characters This string matches what follows a typical Hayes Smartmodem ATDT command Possible characters include pauses numbers and letters Refer to the modem documentation Set the Dialout Mode to Auto Spectrum24 AP 4121HR Access Point Product Reference Guide 77 Configuring the AP 7 Configure the other settings as required Answer Wait Time Modem Speaker PPP Timeout PPP Terminates 2 6 5 Answering AP Time in seconds waiting for a remote connection before dropping attempt The default is 6g from a 5 to 255 second range Sends a command to the modem
43. O Bit Encryption If 40 bit encryption is the selected WEP Algorithm this screen is displayed Symbol Access Point Encryption Key Maintenance Key I 18111 21314 Key 2 20212 22324 Key 3 38313 23334 Key 4 40414 24344 Active Key OK CCR Save F1 Save All APs F2 Cancel ESC Each key has 40 bits available to the user for configuration and are displayed in two 20 bit segments The remaining 24 IV initialization vector bits are factory set and not user configurable 1 Select the desired key and enter the new value to change the Key value 2 Verify and change the values set as needed to reflect the network environment 3 Select 0k or Save to register settings by writing changes to NVM Selecting Save displays a confirmation prompt Spectrum24 AP 4121HR Access Point Product Reference Guide 71 Configuring the AP 4 Select Save ALL APs F2 to save the Encryption Key Maintenance information to all APs with the same Net_ID ESS This option saves the configuration changes for the current AP and sends two WNMP messages to all other APs on the Known APs table to update their configuration and reset after the configuration has been modified Users can perform this option only among the same hardware platforms and same firmware versions 5 Select ESC to disregard any changes made to this screen and return to the previous menu 128 Bit Encryption If 128 bit encryption is the selected WEP Algorithm t
44. P DTE AP DTE DB 9 Female DB 9 Female 2 3 3 2 1 i 6 1 6 4 7 8 8 5 Connecting two APs with modem devices requires straight through cables between the APs and modems Using modems requires a telephone line for as long as the link remains active AP DTE Modem DCE DB 9 Female DB 25 Male 1 _ 8 2 3 4 20 5 6 FA 8 9 22 When using a modem connection one AP represents the originating AP and the other represents the answering AP When using a PPP link do not use the serial port to access the UI Access to the UI requires establishing a Telnet session with the AP Spectrum24 AP 4121HR Access Point Product Reference Guide 19 Introduction 1 3 6 Direct Sequence Spread Spectrum Spread spectrum broadband uses a narrowband signal to spread the transmission over a segment of the radio frequency band or spectrum Direct sequence is a spread spectrum technique where the transmitted signal is spread over a particular frequency range The Spectrum24 AP 4121 HR Access Point uses direct sequence spread spectrum DSSS for radio communication Direct sequence systems communicate by continuously transmitting a redundant pattern of bits called a chipping sequence Each bit of transmitted data is mapped into chips by the access point and rearranged into a pseudorandom spreading code to form the chipping sequence The chipping sequence is combined with
45. P A channel DTIM and TIM interval To manually designate AP B as the Root AP assign it a lower WLAP Priority value See 2 5 Configuring Radio Parameters on page 58 Assigning a WLAP Priority value of 7828 Hex to the AP B MAC address AQ F8 11 23 5D causes AP B to become the Root AP by having the lowest WLAP ID 7OOBOOABF811235D IEEE 802 1d Spanning Tree Support This protocol creates a loop free topography with exactly ONE path between every device and LAN This is the shortest path from the Root AP to each WLAP and LAN If the connection between a WLAP and LAN fails a new route is calculated and added to the tree All packet forwarding follows the spanning tree path determined APs in a network have to choose one AP as the Root AP 1 2 3 Site Topography 10 For optimal performance locate MUs and APs away from transformers heavy duty motors fluorescent lights microwave ovens refrigerators and other industrial equipment Signal loss can occur when metal concrete walls or floors block transmission Locate APs in open areas or add APs as needed to improve coverage Spectrum24 AP 4121HR Access Point Product Reference Guide Introduction Site Surveys A site survey analyzes the installation environment and provides users with recommendations for equipment and its placement The optimum placement of 11 Mbps access points differs for 1 or 2 Mbps access points because the locations and number of access points required are diff
46. Point S S S S S S S S S OW OW OW OW OW OW OW OW OW System Summary Interface Statistics Forwarding Counts Mobile Units Known APs Ethernet Statistics RF Statistics Misc Statistics Event History Enter Admin Mode MAIN MENU Configuring the AP AP Installation Special Functions Se Se Se Se Se Se Se Se System Configuration RF Configuration Serial Port Configuration Access Control List Address Filtering Type Filtering SNMP Configuration Event Logging Configuration The top line displays the System Name for the AP default is Symbol Access Point and the name of the configuration screen The UI uses the following keystrokes to navigate through the menus and screens depending on the terminal emulation For terminal emulation programs that do not support arrow or function keys use the control character equivalents UP ARROW DOWN ARROW LEFT ARROW RIGHT ARROW F1 F2 F3 F4 CTRL O CTRL I CTRL U CTRL P CTRL Q CTRL W CTRL E CTRL R Spectrum24 AP 4121HR Access Point Product Reference Guide 43 Configuring the AP The following conventions also apply when navigating screens and menus 44 To select menu items press the key corresponding to the bold letter for the item case sensitive hot key Press ENTER to select the item Press TAB to scroll through menu items To change menu items note the bottom line on the screen for con
47. RENs should not exceed 5 0 To be certain of the number of devices that may be connected to the line as determined by the total number of RENs contact the telephone company to determine the maximum REN for the calling area If the modem causes harm to the telephone network the telephone company will notify you in advance however if advance notice is not practical you will be notified as soon as possible Also you will be advised of your right to file a complaint with the FCC if you believe it is necessary The telephone company may make changes in its facilities equipment operations or procedures that could affect the operation of the modem If this happens the telephone company will provide advance notice so you may make any necessary modifications to maintain uninterrupted service Spectrum24 AP4121HR Access Point Product Reference Guide D 3 Regulatory Compliance Canada D 4 ap Caution If this product contains an internal modem it is compliant with CS 03 of Industry Canada and there will be a Canadian certification number CANADA _____ ona label on the outside of the product This certification means that the equipment meets certain telecommunications network protective operational and safety requirements The Department does not guarantee the equipment will operate to the user s satisfaction Before installing this equipment users should ensure that it is permissible to be connected to the facilities of the local t
48. Spectrum24 AP 4121HR Access Point Product Reference Guide 70E 20688 03 Revision A June 2000 sanbol www symbol com Copyright Copyright 2000 by Symbol Technologies Inc All rights reserved No part of this publication may be modified or adapted in any way for any purposes without permission in writing from Symbol The material in this manual is subject to change without notice Symbol reserves the right to make changes to any product to improve reliability function or design No license is granted either expressly or by implication estoppel or otherwise under any Symbol Technologies Inc intellectual property rights An implied license only exists for equipment circuits and subsystems contained in Symbol products Symbol the Symbol logo and Spectrum24 are registered trademarks of Symbol Technologies Inc Other product names mentioned in this manual may be trademarks or registered trademarks of their respective companies and are hereby acknowledged IBM is a registered trademark of International Business Machine Corporation Microsoft Windows and Windows NT are registered trademarks of Microsoft Corporation Novell and LAN Workplace are registered trademarks of Novell Inc Toshiba is a trademark of Toshiba Corporation Patents This product is covered by one or more of the following U S and foreign Patents U S Patent No 4 387 297 4 460 120 4 496 831 4 593 186 4 603 262 4 607 156 4 652 750 4 673
49. Spectrum24 AP 4121HR Access Point Product Reference Guide 119 Monitoring Statistics 3 8 Radio Statistics The AP keeps radio performance statistics including packet and communication information To view RF statistics 120 Select Show RF Statistics from the Main Menu to display Symbol Access Point Data Pkts Sent Data Bytes Sent BC MC Packets Sent BC MC Bytes Sent Sys Packets Sent SBC MC Packets Sent Succ Frag Packets UnSucc Frag Packets Fragments Sent Packets w o Retries Packets w Retries Packets w Max Retries Total Retries Refresh F1 Spectrum24 AP 4121HR Access Point Product Reference Guide RF Statistics 28 2984 a 14128 aaa Timed F2 Data Pkts Rcvd Data Bytes Rcvd BC MC Packets Rcvd BC MC Bytes Rcvd Sys Packets Rcvd SBC MC Packets Rcvd Succ Reass Packets UnSucc Reass Packets Fragments Rcvd Rev Duplicate Pkts Undecryptable Pkts Rev CRC Errors Rev ICV Errors WLAP F3 494 36524 23 Exit LESC Monitoring Statistics Radio performance statistics include Data Packets Sent total data packets transmitted Data Bytes Sent total data packets transmitted in bytes BC MC Packets Sent broadcast multicast user data packets successfully transmitted BC MC Bytes Sent broadcast multicast user data bytes successfully transmitted Sys Packets Sent system packets successfully transmitted SBC MC Packets Sent broadcast multicast system packets successf
50. Symbol Support Center to report missing or improperly Note functioning items Verify the AP model indicated on the bottom of the unit and packaging Spectrum24 AP 4121HR Access Point Product Reference Guide 133 Hardware Installation 4 3 Requirements The minimum installation requirements for a single cell peer to peer network a power outlet e an AP antenna The AP supports a 10Base T unshielded twisted pair UTP standard Users can order a null modem cable part number 61383 00 0 for direct serial connections by contacting a Symbol sales representative eb Test and use the radio network with an MU Note 4 3 1 Network Connection Locate connectors for Ethernet and power on the back of the AP Ethernet configurations vary according to the environment Determine the Ethernet wiring to connect the AP 10Base T UTP or single cell eb The site survey determines the number of APs to install and their location Note 4 3 2 10Base T UTP Use a 10Base T connection for an AP attached to a wired UTP Ethernet hub Normal 10Base T limitations apply 1 Plug the data cable RJ 45 connector into the AP RJ 45 connector 2 Plug the other end of the data cable into the LAN access port possibly a hub or wall connection 134 Spectrum24 AP 4121HR Access Point Product Reference Guide Hardware Installation 4 3 3 Single Cell The single cell connection option allows a single AP to bridge MUs without a wired network
51. WLAP mode LED display 138 M MAC Layer Bridging 12 address database 12 MAC address 12 management options 29 SNMP 29 Telnet 29 Index 6 WLAN 29 miscellaneous statistics 126 Mobile IP 23 configuration 104 foreign agent 24 116 mapping 116 roaming across routers 24 using MD5 authentication 104 Model Number 109 monitoring statistics 107 ethernet statistics 118 interface statistics 110 miscellaneous statistics 126 radio statistics 120 MU 8 access control 13 ACL 13 association process 25 authentication 28 CAM 26 carrier signal 3 cellular coverage 8 clearing MUs from the AP 90 current transmit rate 115 data decryption 27 data encryption 27 DTIM 27 filtering 13 home agent 25 known APs 117 Mobile IP 23 116 performing pings 101 power mode 114 priority 115 scanning 25 security 27 Spectrum24 AP 4121HR Access Point Product Reference Guide statistics 112 supported rates 115 MU association process 21 multiple APs 5 N network topology 3 P PPP 16 implementation 18 interface 16 link 17 mode 17 programmable SNMP trap 29 management stations 29 MIB 29 SNMP agent 29 PSP stations 26 beacon 26 MU 26 R radio basics 3 carrier signal 3 center frequency 3 digital data 3 electromagnetic waves 3 environment 3 ethernet device 3 IEEE address 3 MAC 3 radio links 3 receiving antenna 3 wireless network 4 radio interface 15 radio parameters 58 AP 7 58 BC MC Q maximum 59 beacon interval 60 broadcast ESS 6
52. able AP e the supported rate changes or the MU finds a better transmit rate with another AP e the RSSI received signal strength indicator of a potential AP exceeds the current AP e the ratio of good transmitted packets to attempted transmitted packets falls below a threshold An MU selects the best available AP and adjusts itself to the AP direct sequence channel to begin association Once associated the AP begins forwarding any frames it receives addressed to the MU Each frame contains fields for the current direct sequence channel The MU uses these fields to resynchronize to the AP 1 3 8 Mobile IP The Internet Protocol identifies the MU point of attachment to a network through its IP address The AP routes packets according to the location information contained in the IP header If the MU roams across routers to another subnet the following situations occur e The MU changes its point of attachment without changing its IP address causing forthcoming packets to become undeliverable e The MU changes its IP address when it moves to a new network causing it to lose connection Mobile IP enables an MU to communicate with other hosts using only its home IP address after changing its point of attachment to the internet intranet Spectrum24 AP 4121HR Access Point Product Reference Guide 23 Introduction Note 24 Mobile IP is like giving an individual a local post office forwarding address when leaving home for an ex
53. act for any technical problem question or support issue involving Symbol products If the Symbol Customer Support specialists cannot solve a problem access to all technical disciplines within Symbol becomes available for further assistance and support Symbol Customer Support responds to calls by email telephone or fax within the time limits set forth in individual contractual agreements When contacting Symbol Customer Support please provide the following information e serial number of unit e model number or product name e software type and version number North American Contacts Inside North America contact Symbol by e Symbol Technologies Inc One Symbol Plaza Holtsville New York 11742 1300 Telephone 1 516 738 2400 1 800 SCAN 234 Fax 1 516 738 5990 e Symbol Support Center telephone 1 800 653 5350 fax 516 563 5410 Email support symbol com Spectrum24 AP 4121HR Access Point Product Reference Guide C 1 Customer Support International Contacts Outside North America contact Symbol by e Symbol Technologies Technical Support 12 Oaklands Park Berkshire RG41 2FD United Kingdom Tel 011 44 118 945 7000 or 1 516 738 2400 ext 6213 Symbol Developer Program Web Site http sdp symbol com Additional Information Obtain additional information by contacting Symbol at e 1 800 722 6234 inside North America e 1 516 738 5200 in outside North America e http www symbol com C 2
54. adio interface e Away indicates the unit is no longer associated with the AP Power Mode The MU power mode CAM PSP or N A Station ID The IEEE 802 11 specification requires that each AP assign a station ID to all associated MUs regardless of the MU power mode PSP or CAM Begin Current Assoc The time the current association begins in hours minutes and seconds Spectrum24 AP 4121HR Access Point Product Reference Guide Supported Rates Current Xmt Rate Priority Encryption Packets Sent Packets Revd Bytes Sent Bytes Revd Discard Pkts CRC Last Activity Last Data Activity Monitoring Statistics Data transmission rates the station supports The current rate the AP transmits data to the station Indicates whether the MU is a voice or data type device Voice indicates packet delivery is time critical and a high priority Normal indicates packet delivery is not time critical MU encryption support On or Off The packets sent by the AP to the MU The packets received by the AP from the MU The bytes sent by the AP to the MU The bytes received by the AP from the MU The packets discarded because of data error The time in hours minutes and seconds since the last communication with the MU The time in hours minutes and seconds since the last data transfer e Select Refresh at the status display to update values manually e Press ESC to return to the previous menu Spectrum24 AP 4121HR Access Point Product R
55. aining access to the UI User Interface The dot in front of certain parameters functions or options Antenna Selection Primary Only indicates these items update to all APs with the same Net_ID ESS when choosing the Save ALL APs F2 option Users can perform this option only among the same hardware platforms and same firmware versions 2 1 Gaining Access to the Ul The method for establishing access to the Ul depends on the connection used Select the setup that best fits the network environment 2 1 1 Using Telnet Note Using a Telnet session to gain access to the UI requires that a remote station have a TCP IP stack The remote station can be on the wired or wireless LAN To access the AP from the workstation 1 From the DOS prompt Telnet to the AP using its IP address Telnet XXX XXX XXX XXX 2 At the prompt type the password Symbol The password is case sensitive Spectrum24 AP 4121HR Access Point Product Reference Guide 33 Configuring the AP 3 Press the ESC key The AP displays the Main Menu Symbol Access Point MAIN MENU Show System Summary AP Installation Show Interface Statistics Special Functions Show Forwarding Counts Set System Configuration Show Mobile Units Set RF Configuration Show Known APs Set Serial Port Configuration Show Ethernet Statistics Set Access Control List Show RF Statistics Set Address Filtering Show Misc Statistics Set Type Filtering Show Event History Set SN
56. al mode provides read only privileges and does not allow the user to view this screen Specifies enabling or disabling the access control feature If enabled the ACL Access Control List specifies the MAC addresses of MUs that can associate with this AP The default is Disabled Specifies filter type for packets received either Forward Discard or Disabled The default value is Disabled Spectrum24 AP 4121HR Access Point Product Reference Guide Configuring the AP WNMP Specifies if the AP can perform WNMP functions Functions The default value is Enabled AP AP State Specifies AP to AP communication exchanged Xchg 4 To enable or disable interfaces on the AP modify the following parameters Ethernet Enables or disables wired Ethernet Interface The default value is On PPP Interface Enables or disables serial PPP The default value is Off RF Interface Enables or disables radio The default value is On Default Interface Specifies the default interface Ethernet PPP or WLAP that the AP forwards a frame to if the AP cannot find the address in its forwarding database The default interface is Ethernet 5 Verify the values set reflect the network environment Change them as needed 6 Select 0k or Save to register settings by writing changes to NVM Selecting Save displays a confirmation prompt 7 Select Save ALL APs F2 to save the System Configuration information to all APs with the same Net_ID ESS This option saves the
57. alphanumeric case sensitive network identifier Identifies the direct sequence channel used by the access point The channel used is within the range required for the operating country Identifies AP country code that in turn determines the AP direct sequence channel range Indicates if the AP is configured for single or dual antenna mode Defines the WEP algorithm Admin privileges are required to make changes to this parameter The default is Disabled Defines the number of bits and type of WEP algorithm used Admin privileges are required to make changes to this parameter The default is 48 bit shared Specifies the current number of associated MUs Specifies the total MU associations handled by this AP Specifies how long the system has been operational System Up Time resets to zero after a 119 304 hours Specifies if the access control feature is enabled or disabled If enabled the ACL specifies the MAC addresses of the MUs that can associate with this AP Spectrum24 AP 4121HR Access Point Product Reference Guide WLAP Mode Model Number Serial Number Hardware Revision AP Firmware Ver RF Firmware Ver HTML File Ver Start Flashing All LEDs Reset AP Monitoring Statistics Specifies if enabling the wireless AP operation status If enabled the AP sets up automatically for wireless operation This feature is Disabled by default Identifies the model number States the APs unique identifier Specifies the hardwar
58. assword 57 configuration 53 Encryption Admin 54 Ethernet timeout 53 MD5 key 54 System Password Admin 54 Telnet logins 53 type filtering 54 User Password 57 Web Server 54 WNMP functions 55 system password 42 system summary 107 access control 108 antenna selection 108 country code 108 current MUs 108 Spectrum24 AP 4121HR Access Point Product Reference Guide firmware version 109 IP address 108 MAC address 108 model number 109 Net_ID 108 serial number 109 WLAP mode 109 T TIM association process 9 root AP 9 Traffic Indicator Message See TIM transmission medium 3 troubleshooting 140 AP does not power up 140 no connection 140 slow or erratic performance 141 SRAM test 140 wired network operation 140 wired network problems 140 U UI 33 access 33 changing access 46 configuration 33 dial up access 31 dial up connection 36 direct serial access 31 hanging up 49 navigation 43 password 33 Telnet 31 Usage 31 Web browser 31 Web browser 37 WEP algorithm 27 WEP privacy 61 wireless operation parameters configuration 64 IEEE 802 1d Spanning Tree Protocol 64 WLAP forward delay 68 WLAP hello time 67 WLAP interfaces 64 WLAP manual BSS ID 67 WLAP Max Age 67 WLAP mode 66 WLAP priority 66 WLAP priority value 10 WLAP forward delay configuration 68 WLAP hello time configuration 67 WLAP manual BSS ID configuration 67 WLAP Max Age configuration 67 WLAP mode AP 6 associatio
59. ation Binary GFSK TX Out of Band US FCC part 15 247 15 205 15 209 Emissions Europe ETS 300 320 Japan RCR STD 33 A 2 Spectrum24 AP 4121HR Access Point Product Reference Guide Specifications A 3 Network Characteristics Driver Support Ethernet Frame Filtering Packet Rate Ethernet Connection Serial SNMP NDIS v4 0 and v5 0 DIX Ethernet_Il and IEEE 802 3 14 400 frames per second filtering and forwarding 10Base T RJ 45 PC AT serial port DB9 Male RS 232 using a DTE termination 19200 bps Version 1 Version 2 subset Symbol MIB 802 11 MIB and MIB II Spectrum24 AP 4121HR Access Point Product Reference Guide A 3 Specifications Spectrum24 AP 4121HR Access Point Product Reference Guide Appendix B Supported Modems The AP uses Hayes commands and is capable of working with various modems of 19200 baud or faster Symbol does not support modems the company has not qualified The following modems qualify to work with the AP 4121 HR access point e US Robotics Faxmodem v 90 56K e US Robotics Faxmodem v 33 6K e US Robotics Faxmodem v 34 and v 32 bis Sportster 28 8K e Diamond Supra Express 56K Spectrum24 AP 4121HR Access Point Product Reference Guide B 1 Supported Modems B 2 Spectrum24 AP 4121HR Access Point Product Reference Guide Appendix C Customer Support Symbol Technologies provides its customers with prompt and accurate customer support Use the Symbol Support Center as the primary cont
60. b server is required to access the Help file from the Spectrum24 Access Point Configuration Management System web pages This procedure applies to the Microsoft Internet Information Server The network Web server can be different if so some of the procedures differ This procedure is for Network or System Administration personnel only To create the Help file on a network Web server 1 Create a directory on the network Web server for the AP Web Site Help Files to reside Often this is a subdirectory to C InetPub wwwRoot 2 Copy the gif and htm files to this directory folder The files are maintained in the x firmware AP AP Web Site Help File directory Where x is the letter assigned to the computer CDROM drive Spectrum24 AP 4121HR Access Point Product Reference Guide 37 Configuring the AP 38 Note Note This installation example is for Windows NT 4 0 DSi OT oR oa From the windows Task Bar select Start From the drop down menu select Programs From this menu select Microsoft Internet Server common From this menu select Internet Service Manager to launch the Internet Information Server Service Manager Click on the Web service Ensure the server WWW service is running 10 14 Select Properties Select Service Properties to display the WWW service properties for the server The WWW Service Properties window opens Select the Directories Tab Select the Add button
61. ber of Requests Packet Length Packet Data Echo Test DD AD F8 18 4A 13 18 18 55 Start CR Cancel ESC Enter the MAC address of the station to echo 3 Enter the number of echo requests 1 to 539 length of packets in bytes 1 to 539 and data content in hex 0x00 to OxFF 102 Spectrum24 AP 4121HR Access Point Product Reference Guide Configuring the AP 4 Select Start CR to begin The AP dynamically displays packets transmitted and received Echo Test in Progress Station Address 06 AG F8 18 4A 13 Requests Transmitted 1 Responses Received at Press any key to stop Spectrum24 AP 4121HR Access Point Product Reference Guide 103 Configuring the AP 2 16 Mobile IP Using MD5 Authentication Users can achieve authentication by using the MD5 algorithm with a shared key configured into the AP and its MU MD5 is a message digest algorithm that takes an arbitrarily long message and computes a fixed length digest version consisting of 16 bytes 128 bits of the original message Users can think of the message digest as a fingerprint of the original message Since the message digest is computed using a mathematical formula or algorithm the probability of an entity reproducing the message digest is equivalent to two people having the same fingerprints The message digest is the authentication checksum of a message from a mobile MU to an AP during the Home Agent registration process The MD5 algorithm purpose
62. ceived that contained CRC Cyclic Redundancy Check errors An MU transmitted a corrupt data packet and failed to pass the CRC verification Ensure that any acknowledgment of the data packet contains the correct CRC word An incorrect CRC causes the AP to discard the data packet Packets received containing ICV Identity Check Value errors An MU transmitted a corrupt data packet and failed to pass the ICV verification The calculated ICV value does not match with the ICV value in the received packet Select Refresh at the status display to update the values manually Select Timed to automatically update this display every two seconds Press ESC to return to the previous menu Spectrum24 AP 4121HR Access Point Product Reference Guide Monitoring Statistics e To display the WLAP RF Statistics screen select WLAP F3 Symbol Access Point WLAP RF Statistics Current WLAP Itf 1 Root Interface Root Priority 10068 hex Current State Functional Root MAC Addr DD AD F8 8A 38 77 Priority 8028 hex Root Path Cost Pras SoS ES Wireless AP Interface Table Itf WLAP Itf Itf Path Designated Designated ID MAC Addr State Cost Root ID Cost WLAP ID Itf ID 8001 A F8 8A 38 77 FWD 1 1 a f88a3 77 8B a f88a3 77 8001 8002 B0 08 008 00 08 08 DIS 1 8 a f88b7221 8 a f88b7221 882 8003 B0 08 008 00 08 08 DIS 1 8 a f88b7221 8 Ba f88b7221 8003 8004 B0 08
63. configuration changes for the current AP and sends two WNMP messages to all other APs on the Known APs table to update their configuration and reset after the configuration has been modified Users can perform this option only among the same hardware platforms and same firmware versions 8 Select Cance1 ESC to disregard any changes made to this screen and return to the previous menu Spectrum24 AP 4121HR Access Point Product Reference Guide 55 Configuring the AP 2 4 1 56 ay Caution System Password Administration This screen allows the network administrator to configure the passwords for the AP The user password allows the user to Telnet into the AP or use the serial port and have read only privileges Accessing the UI in an Admin mode session through the serial port the session does not time out On entering the Admin mode with both the Telnet and Serial Port interfaces active enables Admin mode on both interfaces This can cause a security breach if a user without admin privileges Telnets into the AP while the admin security level is enabled entitling the user to admin level access a To access and change the System Passwords select System Password Admin CF4 from the System Configuration Menu The Change System Passwords screen displays Symbol Access Point Change System Passwords User Password FORK RK Admin Password FOR KK Save F1 Cancel ESC Password for user access Monitor only Spectrum24
64. d WLAP ID Designated Itf ID Monitoring Statistics Identifies the wireless interface the AP uses to communicate with another device States the MAC address of the associated WLAP Identifies the state of the interface from e DIS the interface is disabled e LIS the AP listens for information e LRN the AP learns the information e FWD the AP forwards data e BLK the AP blocks transmission An abstract unit added to the Root Path Cost field in the Config BPDU received on this interface The unit represents a hop on the path to the Root AP An ID designated by the Root AP APs in WLAP mode negotiate the position of Root AP at power up The AP with the lowest Root ID path and WLAP ID becomes the Root AP The Root ID and the WLAP ID are 16 digit numbers The first 4 digits represent the Priority value and the remaining 12 digits represent the MAC address of the AP A path cost designated by the Root AP A WLAP ID assigned by the Root AP An Itf ID assigned by the Root AP Select Refresh at the status display to update the values manually Select Timed to automatically update this display every two seconds Press ESC to return to the previous menu Spectrum24 AP 4121HR Access Point Product Reference Guide 125 Monitoring Statistics 3 9 Miscellaneous Statistics The AP keeps statistics on WNMP and SNMP packets filtering violations and serial port use The Miscellaneous Statistics screen shows grouped statistics
65. ddress represents the BSS_ID The MU recognizes the AP it associates with using the BSS_ID Adding APs to a LAN establishes more cells in an environment making it an RF Network using the same Net_ID or Extended Service Set ESS NET_ID APs with the same Net_ID ESS define a coverage area The MU searches for APs with a matching Net_ID ESS and synchronizes with an AP to establish communications This allows MUs within the coverage area to move about or roam As the MU roams from cell to cell it switches APs The switch occurs when the MU analyzes the reception quality at a location and decides the AP to communicate with based on the best signal strength and lowest MU load distribution If the MU does not find an AP with a workable signal it performs a scan to find any AP As MUs switch APs the AP updates the association table Spectrum24 AP 4121HR Access Point Product Reference Guide Introduction The user can configure the Net_ID ESS A valid Net_ID ESS is an alphanumeric case sensitive identifier up to 32 characters Ensure all nodes within one LAN use the same Net_ID ESS to communicate on the same LAN Multiple wireless LANs can coexist in a single environment by assigning different Net_IDs ESS for APs The Root AP and Association Process By default APs with WLAP Mode enabled and within range of each other automatically associate and configure wireless operation parameters at power up Th
66. e Spectrum24 AP 4121 HR access point Choose one of the options based on environment Resting flat Rests on the four rubber pads on the underside of the AP Place on a surface clear of debris and away from traffic Attaching on the wall Rests on screws Orient the AP in a downward position on the wall so the LEDs face the floor 4 7 Connecting the Power Adapter The power adapter connects to the rear of the AP and to a power outlet 1 Verify the power adapter is correct according to the country 2 Plug the power adapter cable into the socket at the back of the AP 3 Plug the adapter into an outlet The AP is functional when the Status indicator on the front of the AP reaches a consistent flashing and the Wireless LAN Activity indicator begins flickering This indicates that the AP is ready for MUs to associate with it The AP works without user intervention after setup See the AP LED indicators to verify that the unit operates properly 136 Spectrum24 AP 4121HR Access Point Product Reference Guide Hardware Installation 4 8 LED Indicators The top panel LED indicators provide a status display indicating transmission and other activity The indicators are Power Flashing indicates AP initialization Steady Green during operation Wired LAN Activity Flashing indicates data transfers on wired connection K Wireless LAN Activity Flickering indicates beacons and data T transfers with MUs Spectrum24 AP 4121HR Acc
67. e in the maximum MAC address in the bottom value DD 0A F8 FO 02 FF Press ENTER to accept the value use the DOWN ARROW key to select OK Spectrum24 AP 4121HR Access Point Product Reference Guide Configuring the AP 5 Press ENTER The UI displays Symbol Access Point Ranges of Allowed Mobile Units Min Address Max Address DD AD F8 F 01 81 AD F8 F 82 FF OB AB F8 29 18 02 O6 AB F8 29 11 88 Delete F1 Add F2 Save All APs F3 Exit LESC 6 Verify values reflect the network environment Change them as needed Select Delete F1 to delete a range of Mobile Units Select Add F2 to add a range of Mobile Units Select Save ALL APs F3 to save the Ranges of Allowed Mobile Units information to all APs with the same Net_ID ESS This option saves the configuration changes for the current AP and sends two WNMP messages to all other APs on the Known APs table to update their configuration and reset after the configuration has been modified Users can perform this option only among the same hardware platforms and firmware versions 10 Select Exit CESC to return to the previous menu When users enable the Access Control option all MUs within the specified range can associate with the AP Specify additional ranges as needed or add to the ACL using individual address entries Spectrum24 AP 4121HR Access Point Product Reference Guide 85 Configuring the AP 2 8 2 Adding Allowed MUs The Access Control List scree
68. e respective 128 bit key is also changed Consequently when a 128 bit encryption key is changed the first 40 bits of the 40 bit encryption key is changed Moreover configuring the encryption Keys using the SNMP Trap Manager overrides the Key value s for the AP s accessed by the SNMP Trap Manager Symbol provides a total of four Encryption Keys Each key enables encryption between the AP and an associated MU with the same encryption Key and Key value Spectrum24 AP 4121HR Access Point Product Reference Guide 69 Configuring the AP 70 Note Two screens are available one for 40 bit encryption and one for 128 bit encryption Considerable care is required when assigning keys Keys have to be in the same order with the same value per key for the AP and MU to authenticate data transmission using encryption Example An AP uses Key 1 with a value of 1911121314 The associated MU requires the same Key 1 to have the value 1811121314 Some countries do not have access to the 128 bit encryption screens due to imposed encryption export restrictions To access the 128 bit encryption screen contact the Symbol Customer Support Center at 1 800 653 5350 for the unique access code to enable this feature To access the Encryption Key Maintenance screen determined by the WEP algorithm chosen select Encryption Key Maintenance from the RF Configuration Menu Spectrum24 AP 4121HR Access Point Product Reference Guide Configuring the AP A
69. e version Specifies the firmware version Specifies the Radio firmware version Specifies the HTML file version Begins a test routine to check the LED functionality and allows the user to determine the AP location Clears the APs statistics and restores the last saved configuration 3 Press ESC to return to the previous menu Spectrum24 AP 4121HR Access Point Product Reference Guide 109 Monitoring Statistics 3 2 Interface Statistics The Interface Statistics screen provides e packet forwarding statistics for each interface Ethernet PPP RF e performance information for each interface in packets per second PPS and bytes per second BPS The AP interface indicates packets sent to the AP protocol stack e g configuration requests SNMP Telnet e Select Interface Statistics from the Main Menu to display Symbol Access Point Interface Statistics Packets Packets Bytes Bytes Sent Revd Sent Revd Ethernet 14866 5 1268844 5 PPP 5 5 5 5 RF 5 5 5 5 AP 13975 5 1257758 5 RER e OD Rare Interface Rates arrerentintanAonsenee mids PPS PPS BPS BPS Sent Rcvd Sent Rcvd Ethernet 5 5 5 5 PPP 5 g g 5 RF g Ll 5 g AP g 1 Refresh F1 Timed F2 Exit CESC Select Refresh at the status display to update values manually Select Timed to automatically update this display every two seconds Press ESC to return to the previous menu 110 Spectrum24 AP 4121HR Access Point Product Reference Guide Monitorin
70. eceaeeeeeeees 14 TSS DHCP SUD POM sermant ea e a a 14 w34 Media Ty peSisvvcccscvvvscsanvas is rior KEAK ERVEN E E V ia 15 1 53 S Brld Ging SUPPOM ersen a AE E I E Ea seeds 16 1 3 6 Direct Sequence Spread Spectrum cccesceccceseececeeeeeeeenees 20 1 3 7 MU Association Proces Siinain nerien ao 21 VSB Mobile lP sspe en anr sa a i eS 23 1 3 9 Supporting CAM and PSP Stations cccccseeeeeeceeceaeeeeeeees 26 1 23 LO Data Encryption s icisce wctoess ae a acto vattions avieeatian aves 27 1 3 11 HTTP HTML Web Server Support eccceeseeeeeeceeceaeeeeeeees 28 1 3 12 Management Options ccseeceeeseececeeeececeeeeeeceeeeeeenseres 29 Chapter 2 Configuring the AP s cs3 cca deediedeuantinnandee 33 2 1 Gaining Access to the Ulivi hassos eaii Era SENERA 33 21 1 Using Telneti n a a a a EET eee 33 2 1 2 Using a Direct Serial Connection sssessesssssseereesssseereressses 35 2 1 3 Using a Dial Up Connection sssssesssssssesssssssesressesseseersssss 36 2 1 4 Using a Web Browser sssssssssssssesssssssterssssseeresessseserrseses 37 2 2 Navigating the Ulss 2 cece decals e ara tages Se taatedevecte eters Mean eS had 43 2 2 1 Entering Admin Mode ccseesecececceaceteeecececacuaeeeeeeeeneeaees 45 2 2 2 Changing the Access to the Ul e ee seseeeecececaeeeeeeceeeeneenees 46 Spectrum24 AP 4121HR Access Point Product Reference Guide v vi 2 2 3 Configuring for Dial Up to the Ul ce ceeseseeese
71. ecial Functions screen To save the AP installation configuration information to all APs with the same Net_ID ESS This option saves the configuration changes for the current AP on the Known APs table to update their configuration and reset after the configuration has been modified Users can perform this option only among the same hardware platforms and same firmware versions Does not register settings changed in a screen Entering Admin Mode The UI defaults to User when in Serial mode allowing read only access to the APs functions e g view statistics Entering Admin mode provides access to configuration menus and allows the user to configure the AP Entering Admin mode requires the administration password 1 Select Enter Admin Mode from the Main Menu The AP prompts for the administration password Enter System Password 2 Type the default password Symbol The password is case sensitive Spectrum24 AP 4121HR Access Point Product Reference Guide 45 Configuring the AP Ifthe password is correct the AP displays the Main Menu with the Enter Admin Mode menu item changed to Exit Admin Mode Ifthe password is incorrect the AP continues to display the Main Menu with the Enter Admin Mode menu item eb Set the System passwords in the Set System Configuration screen Note 2 2 2 Changing the Access to the Ul To prevent unauthorized Telnet access change the configuration access to the UI T
72. eeneeeeeeeeeeees 48 2 2 4 Navigating the Ul Using a Web Browser sssseeeeeeeeeeees 49 2 3 Access Point Installation ccececeesseeeeececceaceeeeecececaeuaeeeceeeeneuaees 50 2 4 Configuring System Parameters cecececeeceeeececeececececeeeeeaeaeaes 52 2 4 1 System Password Administration s ssececececaceseeeceeeeeeeaees 56 2 5 Configuring Radio Parameters cececceceececececcececeeceeeeaeaeaeaeneaes 58 2 5 1 Wireless Operation Parameters ssececeeecaceseeeceeeeneeaees 64 2 5 2 Encryption Key Maintenance eeseeeeeeeseececeeeececeeeeeeeenees 69 2 5 3 Enable Strong Encryption scccccccsseeeeecececaeeaeeeceeeeneaaees 74 256 GContighrinig AEAEE s vaes cde E 76 26 1 PPP Directie eeii orei ash EE E ERE EN ES 76 2 6 2 Establishing Connech omoare aes rea EESE oE 77 2 6 3 PPP with Modem Sis essare cissdsccsageescssecsccaasdacstsaceccsasbecsacedacess 77 264 Originating AP resio eiiis ii E ENEEK ER EER E a ia 77 26 D ANSWELINGEAR arn inoren aa E AAEE ATOE AaS EAN 78 2 6 6 Initiating Modem Connection ssssessssessessssssseeresessseseeressss 79 2 7 Configuring the SNMP Agent sceeeeeeeeeeeeeeeceecececeeeeneeaeaeaea 80 2 8 GContig rimgthe ACL iersinii T a aT aai iia 84 2 8 1 Range of MUS ceeeeeecececcecececeeceeeeaeaeaeeeaeaeseeeeeeeeeeeeereees 84 2 8 2 Adding Allowed MUS ccecsssseeececceaceeeeecececaeuaeeeeeeeeaeaaees 86 2 8 3 Removing Allowed MUS
73. efer to MU documentation for installing drivers client software and testing Use the default values for the Net_ID ESS and other configuration parameters until network connection verification Spectrum24 AP 4121HR Access Point Product Reference Guide 141 Hardware Installation 142 Spectrum24 AP 4121HR Access Point Product Reference Guide Appendix A Specifications A 1 Physical Characteristics Dimensions 1 75 Hx 6 Lx 8 5 W 4 45 cm H x 15 24 cm Lx 21 59 cm W Weight 1 Ibs 0 454 kg w power supply Operating 4 F to 131 F 20 C to 55 C Temperature Storage Temperature 40 F to 149 F 40 C to 65 C Humidity 10 to 95 noncondensing Shock 40 G 11 ms half sine ESD meets CE Mark Drop withstands up to a 30 in 76 cm drop to concrete with possible surface marring Spectrum24 AP 4121HR Access Point Product Reference Guide A 1 Specifications A 2 Radio Characteristics Frequency Range country dependent within 2400 MHz to 2500 MHz Frequency Allowed Channel Range Country 2412 2470 1 11 United States 2430 2447 5 8 Israel 2457 2463 10 11 Spain 2458 2472 10 13 France 2483 2485 14 Japan Radio Data Rate e 11 Mbps Optional 5 5 Mbps Optional 2 Mbps Optional e 1 Mbps Required 11 Mbps Range open environment over 100 ft typical office or retail environment 30 to 50 ft TX Max Radiated EIRP US FCC part 15 247 Europe ETS 300 320 Japan RCR STD 33 Modul
74. eference Guide 115 Monitoring Statistics 3 5 Mobile IP The following tables display the mapping of MUs to mobility agents See 1 3 8 Mobile IP on page 23 Select Home Agent from the Show Mobile Units prompt to display Symbol Access Point Home Agent Table Mobile Unit Foreign Agent Mobile Unit Foreign Agent 157 235 95 184 157 235 96 141 157 235 95 111 157 235 97 157 157 235 95 125 157 235 96 141 157 235 95 34 157 235 93 245 Refresh F1 Timed F2 Next F3 Exit CESC e Select Foreign Agent from the Show Mobile Units prompt to display Symbol Access Point Foreign Agent Table Mobile Unit Home Agent Mobile Unit Home Agent 157 235 95 184 157 235 95 188 157 235 95 125 157 235 95 188 157 235 97 114 157 235 97 27 Refresh F1 Timed F2 Next F3 Exit LESC 116 Spectrum24 AP 4121HR Access Point Product Reference Guide Monitoring Statistics 3 6 Known APs The AP displays a list of the known APs derived from AP to AP communication The list includes the MAC and IP addresses and configuration information for each AP The first AP on the list provides the information The AP recognizes other APs listed in subsequent lines A broadcast message to APs every 12 seconds determines this list eb The Save A11 APs function from the Special Functions Menu updates Note configures all APs firmware HTML code shown in the Known APs menu Users can perform this option only among the same hardware platforms and firmware versions
75. eference Guide 73 Configuring the AP 2 5 3 Enable Strong Encryption Some countries do not have access to the 128 bit encryption screens due to encryption export restrictions For countries outside the United States an access code is required to enable the Strong Encryption i e 128 bit encryption Obtain an access code by contacting Symbol Customer Service at 1 800 653 5350 1 To enable Strong Encryption 128 bit encryption select Enable Strong Encryption on the RF Configuration screen This screen is displayed Symbol Access Point Enable Strong Encryption US regulations restrict the export of products containing strong forms of encryption technology Please see user s manual for information on obtaining an access code to unlock strong encryption Access Code OK CR Save All APs F2 Cancel ESC 2 Enter the acquired access code in the space provided 3 Select 0k or Save to register settings by writing changes to NVM Selecting Save displays a confirmation prompt 74 Spectrum24 AP 4121HR Access Point Product Reference Guide Configuring the AP 4 Select Save ALL APs F2 to save the Enable Strong Encryption access code to all APs with the same Net_ID ESS This option saves the configuration changes for the current AP and sends two WNMP messages to all other APs on the Known APs table to update their configuration and reset after the configuration has been modified Users can perform this option only among
76. el becomes available the MU broadcasts a probe with the Net_ID ESS and the broadcast BSS_ID An AP directed probe response generates an MU ACK Mobile Unit Acknowledgment and the addition of the AP to the AP table with a proximity classification An unsuccessful AP packet transmission generates another MU probe on the same channel If the MU fails to receive a response within the time limit it repeats the probe on the next channel in the sequence This process continues through all channels in the range MUs perform partial scans at programmed intervals when missing expected beacons or after excessive transmission retries In a partial scan the MU scans APs classified as proximate on the AP table For each channel the MU tests for CCA The MU broadcasts a probe with the Net_ID ESS and broadcast BSS_ID when the channel is transmission free It sends an ACK to a directed probe response from the AP and updates the AP table An unsuccessful AP packet transmission causes the MU to broadcast another probe on the same channel The MU classifies an AP as out of range in the AP table if it fails to receive a probe response within the time limits This process continues through all APs classified as proximate on the AP table Spectrum24 AP 4121HR Access Point Product Reference Guide Introduction An MU can roam within a coverage area by switching APs Roaming occurs when e an unassociated MU attempts to associate or reassociate with an avail
77. elecommunications company The equipment must also be installed using an acceptable method of connection In some cases the company s inside wiring associated with a single line individual service maybe extended by means of a certified convector assembly telephone extension cord The customer should be aware that compliance with the above conditions may not prevent degradation of service in some situations Repairs to certified equipment should be made by an authorized Canadian maintenance facility designated by the supplier Any repairs or alterations made by the user to this equipment or equipment malfunctions may give the telecommunications company cause to request the user to disconnect the equipment User should ensure for their own protection that the electrical ground connections of the power utility telephone lines and internal metallic water pipe system if present are connected together This precaution may be particularly important in rural areas User should not attempt to make such connections themselves but should contact the appropriate electric inspection authority or electrician as appropriate Spectrum24 AP4121HR Access Point Product Reference Guide Regulatory Compliance The Load Number LN assigned to each terminal device denotes the percentage of the total load to be connected to the telephone loop which is used by the device to prevent overloading The termination of a loop may consist of any combinati
78. er associate with it at time of verifying status AP current Radio transmit rate for the messages sent to this MU 11 for 11 Mbps e Encryption is enabled for this device V Indicates a Symbol Voice enabled device e To bring up the WNMP Packet Ping Function screen press TAB to highlight the MU and select Ping This allows the AP to ping an MU See 2 15 Performing Pings on page 101 Select Timed to automatically update this display every two seconds Select Next to display the next screen Press ESC to return to the previous menu Spectrum24 AP 4121HR Access Point Product Reference Guide 113 Monitoring Statistics 114 e To bring up detailed information on an MU press TAB to highlight the MU and select Information to display Symbol Access Point Information for MU A F8 29 C9 E2 Interface RF ackets Sent 628 State Associated Packets Rcvd 237 Power Mode CAM Bytes Sent 899879 Station id 1 Bytes Rcvd 14388 Begin Current Assoc 16737251 Discard Pkts CRC g Supported Rates 1 2 5 5 amp 11 Mb s Current Xmt Rate 5 5 Mb s Last Activity 6 06 11 Priority Normal Last Data Activity 16 37 14 Encryption Off Refresh F1 Exit ESC Displayed information includes Interface The AP interface shows the MU connection as RF Ethernet PPP or AP State The connection state between the AP and the MU e Host indicates the unit is on the AP or PPP interface e Associated indicates the current association on the r
79. er or Netscape 3 0 or greater Type the IP Address for the associated AP to access the AP using a Web browser http xxx XXX XXX XXX Spectrum24 AP 4121HR Access Point Product Reference Guide Configuring the AP 4 The Spectrum24 Access Point Configuration Management System main page displays Y Spectrum24 Access Point Netscape ol x File Edit View Go Communicator Help T Bookmarks 4 Location MIRAE 2 3 2 2 A 3 S Back Forward Reload Home Search Netscape Pint Security Ga Whats Related DY ep Access Paint ACCESS POINT Configuration Management System 7 Se ee Security Setup 4 System Setup RF Setup 7 pecial Function IK System Propertie Known MUs _ Known APs _ Version 02 00 00 The left frame contains in tree format the contents of the Spectrum24 Access Point web management system Move through the tree by clicking on an icon to expand or collapse the tree The nodes on the tree represent web pages that allow you to view and modify information in the Access Point Document Done The Web pages look different than the Telnet Direct Serial or Dial Up ey Connections but the contents are the same Access the different pages using Note the nodes located in the left frame Refer to the online help file for Web page navigation page contents and parameter use e To view configuration function or option changes on the Web page s turn off
80. erent K Symbol recommends conducting a new site survey and developing a new coverage area floor plan when switching from 1 or 2 Mbps frequency hopping access points to 11 Mbps direct sequence access points Note Spectrum24 AP 4121HR Access Point Product Reference Guide 11 1 3 Access Point Functional Theory To improve AP management and performance users need to understand basic AP functionality and configuration options The AP includes features for different interface connections and network management The AP provides MAC layer bridging between its interfaces The AP monitors traffic from its interfaces and based on frame address forwards the frames to the proper destination The AP tracks the frames sources and destinations to provide intelligent bridging as MUs roam or network topologies change The AP also handles broadcast and multicast message initiations and responds to MU association requests MAC Layer Bridging The AP listens to all packets on all interfaces and builds an address database using the unique IEEE 48 bit address MAC address An address in the database includes the interface media that the device uses to associates with the AP The AP uses the database to forward packets from one interface to another The bridge forwards packets addressed to unknown systems to the Default Interface either Ethernet or PPP
81. es Access to the UI requires one of the following Telnet Client Direct Serial Connection Dial Up Access SNMP Using a MIB Browser Web Browser Access to the AP built in Telnet server from any interface including remote Ethernet connections See 2 1 1 Using Telnet on page 33 The AP acts as a DTE device to connect directly to another DTE device with a null modem serial cable The direct serial access method requires a communication program with ANSI emulation See 2 1 2 Using a Direct Serial Connection on page 35 The dial up access method requires a communication program with ANSI emulation on the remote terminal or PC The terminal or PC dials to an AP with a modem connection The AP supports connection to a Hayes compatible 28 800 baud or faster modem See 2 1 3 Using a Dial Up Connection on page 36 Access to the AP SNMP function using a MIB Browser Typically a Network Manager uses this feature however Symbol does not recommend accessing the AP using this interface method Refer to the MIB Browser documentation for usage Access to the AP built in Web server from any AP interface including Ethernet connections See 2 1 4 Using a Web Browser on page 37 Spectrum24 AP 4121HR Access Point Product Reference Guide 31 Introduction 32 Spectrum24 AP 4121HR Access Point Product Reference Guide Chapter 2 amp Note Configuring the AP Software configuration requires setting up a connection to the AP and g
82. ess Point Product Reference Guide 137 Hardware Installation 4 8 1 WLAP mode LED display When in the WLAP mode this chart signifies the APs LED indicator status For the IEEE 802 11 protocol and APs using firmware version 2 8 82 or above only 1 After power up system initialization begins LED State Status Blinks Wired LAN Activity Blinks if activity occurs Wireless LAN Activity Off 2 When a WLAP begins a full scan LED State Status On Wired LAN Activity Off Wireless LAN Activity Blinks slowly 3 When one or more WLAPs are found but still in full scan state LED State Status On Wired LAN Activity Off Wireless LAN Activity Blinks slowly 4 When the WLAP is in functional state but one or more WLAP connections are not in Forward state LED State Status Blinks regularly Wired LAN Activity Blinks if activity occurs Wireless LAN Activity Blinks slowly 138 Spectrum24 AP 4121HR Access Point Product Reference Guide Hardware Installation 5 When all WLAP connections are in Forward state LED State Status Blinks regularly Wired LAN Activity Blinks if activity occurs Wireless LAN Activity Blinks if activity occurs Special cases e Ifthe WLAP manual BSS_ID is NOT set and no other WLAP is found the WLAP goes to the functional state e Ifthe WLAP manual BSS_ID is set and the specified WLAP not found the WLAP remains in FULL Scan state permanently The LEDs have the following indicator status permanen
83. face 15 ethernet statistics 118 Ethernet wired LAN 1 F features 2 10baseT Ethernet port interface 2 built in diagnostics 2 built in dual antenna assembly 2 DHCP support 2 HTTP Web server support 2 increased MIB support 2 Mobile IP support 2 PC AT serial port interface 2 power supply IEC connector 2 short RF preamble 2 SNMP support 2 support for up to 127 MUs 2 upgradable firmware 2 wireless AP 2 wireless MAC interface 2 filtering ACL 13 introduction 13 firmware 93 auto upgrade all APs via messaging 98 manually updating 93 update using TFTP 93 updating using Xmodem 96 firmware version 109 frequency 3 frequency modulation 3 frequency range 3 G gigahertz 1 H hardware installation 133 10Base T 134 antenna 135 antenna coverage 135 dual antenna assembly 135 mounting the AP 136 network connection 134 package contents 133 power adapter 136 power options 135 precautions 133 single cell connection 135 site survey 134 Help 37 Help file network Web server 37 Spectrum24 AP 4121HR Access Point Product Reference Guide Index 5 ICMP 101 IEEE 802 1d Spanning Tree support association process 10 LAN 10 IEEE address 3 MAC 3 IP 17 bridging 17 forwarding address 24 roaming across routers 24 IP Address 112 AP 112 MU 112 K known APs 117 MAC and IP addresses 117 statistics 117 L LAN IEEE 802 1d Spanning Tree support 10 LED indicators 137 description 137 flashing all LEDs 109 special cases 138 139
84. fer rate on the radio network It monitors Ethernet traffic and forwards appropriate Ethernet messages to MUs over the Spectrum24 network It also monitors MU radio traffic and forwards MU packets to the Ethernet LAN Spectrum24 AP 4121HR Access Point Product Reference Guide 1 Introduction The AP meets the following the regulatory requirements for Europe and many other areas of the world FCC part 15 class A with no external shielding FCC part 15 class B ETS 300 339 compliance including CE mark The AP has the following features built in diagnostics including a power up self check built in dual antenna assembly with optional diversity wireless MAC interface field upgradable Firmware 10baseT Ethernet port interface with full speed filtering power supply IEC connector and a country specific AC power cable PC AT Serial Port Interface support for up to 127 MUs data encryption increased MIB support SNMP support Mobile IP support DHCP support HTTP Web server support short RF preamble wireless AP When properly configured an MU communicating with an AP appears on the network as a peer to other network devices The AP receives data from its wired interfaces and forwards the data to the proper interface The AP has connections for the wired network and power supply The AP attaches to a wall or ceiling depending on installation site requirements Spectrum24 AP 4121HR Access Point Product Reference Guide Introduct
85. fer rate over radio waves is 11 Mbps The Ethernet interface is optional for single cell or PPP connected networks The radio interface conforms to IEEE 802 11 specifications The interface operates at 11 Mbps using direct sequence radio technology The AP supports multiple cell operations with fast roaming between cells With the direct sequence system each cell operates independently Each cell provides an 11 Mbps bandwidth Adding cells to the network provides increased coverage area and total system capacity The AP supports MUs operating in Power Save Polling PSP mode or Continuously Aware Mode CAM without user intervention The DB 9 9 pin RS 232 serial port provides a UI User Interface or a PPP Point to Point Protocol connection The UI provides basic management tools for the AP The PPP provides a link between APs using a serial connection The serial link supports short haul direct serial or long haul telephone line connections The AP is a DTE Data Terminal Equipment device with male pin connectors for the RS 232 port Connecting the AP to a PC requires a null modem cable and connecting the AP to a modem requires a straight through cable Spectrum24 AP 4121HR Access Point Product Reference Guide 15 Introduction 1 3 5 Bridging Support The AP PPP Point to Point Protocol interface accessible from the serial port at the rear of the AP provides two types of bridging operations e Data link bridging between two APs
86. figuration options For multiple choice options press the bold letter to select To change values type in the value and press ENTER If the value is invalid the AP beeps and restores the original value Press TAB to scroll to next menu item The bottom line on the menu enables menu screen changes to take effect Press TAB to scroll to the item and press ENTER to select When changing values such as System Name or System Passwords accept values by scrolling to the next field or pressing ENTER Some screens use function keys to initiate commands For example statistic screens include refresh F1 and Timed F2 commands to update the display Some options listed at the bottom of screens indicate possible commands for a selected item For example in the Known APs screen highlighting an AP on the list and pressing the F1 key brings up the Ping function to Ping that AP Press ESC to exit from submenus Spectrum24 AP 4121HR Access Point Product Reference Guide 2 2 1 amp Note Configuring the AP Administration screens include options for saving or clearing data that appear on the bottom line of the screen Confirmation prompts include the following OK Save Save ALL APs Cancel Registers settings but does not save them in NVM nonvolatile memory A reset command returns to previously saved settings Saves all settings including ones not on that screen to NVM This is the same as Save Configuration in the Sp
87. for options indicates the name of a control in a GUI based application indicates the first use of a term book title variable or menu title indicates monitor screen dialog Also indicates user input A screen is the hardware device on which data appears A display is data arranged on a screen indicates text shown on a radio terminal screen indicates Uniform Resource Locator Spectrum24 AP 4121HR Access Point Product Reference Guide iil This document uses the following for certain conditions or information amp 5 Warning Indicates tips or special requirements Indicates conditions that can cause equipment damage or data loss Indicates a potentially dangerous condition or procedure that only Symbol trained personnel should attempt to correct or perform Spectrum24 AP 4121HR Access Point Product Reference Guide Contents Chapter 1 Uriah orice ee en serie eae 1 Tl Access Point AP eeren coud ves sicct cnaseeedsdecetds dices todectessdecdadc S Aa e SaaS 1 1 2 Radio BASICS eiie ea a ERD EEEa Aa E E OT S ES 3 1 2 1 24 Network Topology srne a n a 3 1 2 2 Cellular Coverages cscccicassececs enia a i ia 8 1 2 3 Site Topography cccecsccievecccaneacscsvcccconsveccssoacecaveeeccedevisievecs 10 1 3 Access Point Functional Theory sssssssssssesssssssresrssssseersessssereeeee 12 13 1 MAC Layer Bridging sessies sararan ern en isvnae es 12 1 3 2 Auto Fallback to Wireless Mode cecceceneeeeeee
88. fw bin or dsap_htm bin Change this only if the user or system network administrator requires a new file name The defaults are DSAP_FW BIN and DSAP_HTM BIN a Ensure the file name is DSAP_FW BIN and DSAP_HTM BIN unless the user Q EA changed the file name Spectrum24 AP 4121HR Access Point Product Reference Guide 99 Configuring the AP amp Note Note Note 100 Verify the accuracy of the path for the file name See step one 7 Type the TFTP Server IP address in the TFTP Server field 8 Press ENTER 9 Select Save Configuration to save settings 10 Select Special Functions from the Main Menu 11 Select Use TFTP to update ALL Access Point s and press ENTER u on Are you sure Y N is displayed Type y u n The Telnet session ends when the user answers y at the prompt To view the file transfer log switch to the TFTP application The AP resets when the file transfer and FLASH programming completes 12 Telnet to the AP using its IP address 13 At the prompt type the password Symbol The password is case sensitive The AP displays the Main Menu 14 Verify the accuracy of the version number on the System Summary screen 15 Press CTRL D to end the Telnet session Spectrum24 AP 4121HR Access Point Product Reference Guide Configuring the AP 2 15 Performing Pings An access point sends a ping packet to an MU and waits for a response Use
89. g Statistics 3 3 Forwarding Counts Forwarding Counts provides information on packets transmitted from one interface to another Ethernet PPP radio AP Forwarding Counts also displays the broadcast packets Bcast transmitted from the AP Select Forwarding Counts from the Main Menu to display Symbol Access Point Forwarding Counts lt Prora Mibteteoicees Oe SERPS per Se Serie Ethernet PPP RF AP Ethernet 5 5 5 5 PPP a 1 RF 1 a AP 1 g 5 5 Bcast 14885 14885 g g Refresh F1 Timed F2 Exit ESC Select Refresh at the status display to update values manually Select Timed to automatically update this display every two seconds Press ESC to return to the previous menu Spectrum24 AP 4121HR Access Point Product Reference Guide 111 Monitoring Statistics 3 4 Mobile Units 112 Mobile Units statistics provide information on MUs associated with the AP The statistics include information on data sent and received activity and association An MU shows only in the Home Foreign Agent Table screens when an MU has roamed to another AP on a different subnet Once an MU has roamed the MU IP Address displays on the Home Agent Table screen of the MU home AP with the IP Address of the Foreign Agent to tell the home AP where to forward packets The MU IP Address is also shown in the Foreign Agent Table and Regular screens of the new foreign AP to tell the new AP where to expect packets f
90. he Main Menu 5 Select Reset AP The AP LEDs flash as if powering up and the AP returns to a STATUS flashing state To hang up 1 Select the Special Functions Menu from the Main Menu 2 Select Modem Hangup Spectrum24 AP 4121HR Access Point Product Reference Guide 79 Configuring the AP 2 7 Configuring the SNMP Agent An SNMP manager application gains access to the AP SNMP agent if it has the AP IP address An AP can be accessed through the SNMP Trap Manager to configure settings and parameters Symbol does not recommend this process eb Configuring the encryption Keys using the SNMP Trap Manager overrides Note the Key values for the Ap or APs accessed by the SNMP Trap Manager The agent configures as read only read write or disabled to provide security when using SNMP The AP sends specific traps for some conditions Ensure the SNMP trap manager recognizes how to manage these traps eb Refer to the Symbol MIB on the Wireless LAN Installation disk for Note specific entries The AP supports SNMP Version 1 a limited feature set of SNMP Version 2 the IEEE 802 11 MIB II and the SYMBOL MIB 80 Spectrum24 AP 4121HR Access Point Product Reference Guide Configuring the AP 1 Select Set SNMP Configuration from the Main Menu to AP display Symbol Access Point SNMP Configuration SNMP Agent Mode Read Write Trap Hostl IP Address 8 8 8 8 Trap Host2 IP Address 8 8 0 8 Read Only Community PERE Read Write
91. he local name that identifies the page usually the file name The HTML language describes how to format the document much like a copyeditor describes which fonts to use such as the location color header size and text Spectrum24 AP 4121HR Access Point Product Reference Guide Introduction 1 3 12 Management Options Managing Spectrum24 includes viewing network statistics and setting configuration options Statistics track the network activity of associated MUs and data transfers on the AP interfaces The AP requires one of the following to perform a custom installation or maintain the Spectrum24 network e SNMP Simple Network Management Protocol e wired LAN workstation with a Telnet client e terminal or PC with RS 232 connection and ANSI emulation Make configuration changes to APs individually Each AP requires an individual IP address Programmable SNMP Trap Support The SNMP protocol defines the method for obtaining information about networks operating characteristics and changing router and gateway parameters The SNMP protocol consists of three elements management stations management information MIB e a management protocol SNMP Nodes can perform as hosts routers bridges or other devices that can communicate status information An SNMP Agent is a node that runs the SNMP management process to systematically monitor and manage the network The management station performs network management by running app
92. his includes enabling or disabling the Telnet Logins or changing the System Passwords To change Telnet access to the AP 1 2 3 Select Set System Configuration from the Main Menu Select Telnet Logins Press the SPACE BAR or LEFT RIGHT ARROW keys to toggle between Enabled and Disabled Use the TAB key to highlight the SAVE F1 function at the bottom of the screen press ENTER to confirm save To change the System Passwords i 2 46 Select Set System Configuration from the Main Menu Press TAB to select System Password Admin F4 Spectrum24 AP 4121HR Access Point Product Reference Guide Configuring the AP 3 The Change System Passwords screen displays Symbol Access Point Change System Passwords User Password RRR Admin Password RRR KK Save F1 Cancel ESC Password for user access Monitor only 4 Change the passwords using the following parameters User Allows the user to only monitor or view the screens Password Select any alphanumeric case sensitive entry up to 13 characters the characters selected are displayed as asterisks The default password is Symbol Admin Allows the user to view and change the parameters Password on each screen Select any alphanumeric case sensitive entry up to 13 characters the characters selected are displayed as asterisks The default password is Symbol 5 Select 0k or Save to register settings by writing changes to NVM Selecting Save displays a confirma
93. his screen is displayed Symbol Access Point Encryption Key 2 282 Key 3 383 Key 4 464 Key Maintenance 1 21314 1516 1718 191A 1B1C 2 22324 2526 2728 292A 2B2C 3 23334 3536 3738 393A 3B3C 4 24344 4546 4748 494A 4B4C Active Key OK ECR Save F1 Save All APs F2 Cancel ESC 72 Spectrum24 AP 4121HR Access Point Product Reference Guide Configuring the AP Each key has 124 bits available to the user for configuration and are displayed in two 20 bit segments and four 16 bit segments The remaining 24 IV initialization vector bits are factory set and not user configurable 1 Select the desired key and enter the new value to change the Key value 2 Verify and change the values set as needed to reflect the network environment 3 Select 0k or Save to register settings by writing changes to NVM Selecting Save displays a confirmation prompt 4 Select Save ALL APs F2 to save the Encryption Key Maintenance information to all APs with the same Net_ID ESS This option saves the configuration changes for the current AP and sends two WNMP messages to all other APs on the Known APs table to update their configuration and reset after the configuration has been modified Users can perform this option only among the same hardware platforms and same firmware versions 5 Select ESC to disregard any changes made to this screen and return to the previous menu Spectrum24 AP 4121HR Access Point Product R
94. initiating AP does not send update commands to non Symbol platforms Users can find the specific APs that have firmware upgraded or downgraded on the Known APs screen The time interval between the WNMP update firmware commands for updating each AP is 2 seconds This interval prevents more than one AP from accessing the TFTP server and causing network congestion Spectrum24 AP 4121HR Access Point Product Reference Guide Configuring the AP The Ethernet TFTP upgrade method requires a connection between the AP and PC on the same Ethernet segment Verify the PC has a TFTP server running on it Running the server requires third party software like FTP PC TCP for DOS or OnNet for Windows The wireless TFTP upgrade method requires a connection between the AP and a TFTP server The TFTP server can be running on a Symbol Spectrum24 device Updating the firmware requires a TFTP server running in the background To update the AP firmware 1 Copy the Firmware files DSAP_FW BIN and DSAP_HTM BIN on the terminal or PC hard disk Telnet to the AP using its IP address eS At the prompt type the password Symbol eb The password is case sensitive Set the System Passwords in the Set System Note Configuration screen The AP displays the Main Menu 4 Select Special Functions from the Main Menu 5 Select Alter Filename s HELP URL TFTP Server and press ENTER 6 Type the firmware file name in the Download Filename field dsap_
95. ion 1 2 Radio Basics Spectrum24 devices use both electromagnetic waves to transmit and receive electric signals without wires Users communicate with the network by establishing radio links between terminals and APs Spectrum24 uses FM frequency modulation to transmit digital data from one device to another Using FM a radio signal begins with a carrier signal that provides the base or center frequency The digital data signal is superimposed on the carrier signal modulation The radio signal propagates into the air as electromagnetic waves A receiving antenna in the path of the waves absorbs the waves as electrical signals The receiving device demodulates the signal by removing the carrier signal This demodulation results in the original digital data Spectrum24 uses the environment the air and certain objects as the transmission medium Spectrum24 radio devices transmit in the 2 4 to 2 5 GHz frequency range a license free range throughout most of the world The actual range is country dependent Spectrum24 devices like other Ethernet devices have unique hardware encoded Media Access Control MAC or IEEE addresses MAC addresses determine the device sending or receiving data A MAC address is a 48 bit number written as six hexadecimal bytes separated by colons For example BO AW F8 24 9A C8 To locate the AP MAC address see the bottom of the unit 1 2 1 24 Network Topology The variations possible in Spectrum24
96. is association process determines the wireless connection viability and establishes the Root AP and subsequently designated WLAPs eb APs communicating wirelessly together require the same Net_ID ESS Note Encryption mode Data Rate and Short RF Preamble settings The root AP maintains the wireless connection among WLAPSs by sending out beacons sending and receiving configuration BPDU Bridge Protocol Data Unit packets between each designated WLAP The WLAP with the lowest WLAP ID becomes the Root AP A concatenation of the WLAP Priority value and the MAC address becomes the WLAP ID Ensure the WLAPs associated with the Root AP use the Root AP channel DTIM Delivery Traffic Indication Message and TIM Traffic Indication Map interval Ethernet OB AG F8 08 18 1A N N semanas 1 NY O8 AG F8 11 23 5D OB AB F8 88 21 9C DD AD F8 8 25 6B Ethernet II Spectrum24 AP 4121HR Access Point Product Reference Guide 9 Introduction In this configuration the WLAP Priority value is the default 844 Hex On concatenating this value to the MAC addresses of the APs AP A on Ethernet has the lowest WLAP ID with 888228A8F888181A making it the Root AP AP C uses the AP A channel DTIM and TIM interval If AP D on Ethernet II has data for a device on Ethernet I it requires a bridge or a repeater In this configuration AP C functions as a repeater To ensure transmission to devices on Ethernet AP D has to use the A
97. lication management software An SNMP trap is an alert to all configured management stations of some significant event that occurred on the network The management station queries all stations for details of each specific event including what when and where the event took place and the current status of the node or network The format or structure is defined in the SNMP protocol The MIB defines what and who monitors the variables Spectrum24 AP 4121HR Access Point Product Reference Guide 29 Introduction 30 Using SNMP The AP includes SNMP agent versions accessible through an SNMP manager application such as HP Open View or Cabletron Spectrum MIB browser The SNMP agent supports SNMP versions 1 and a subset of version 2 MIB II the 802 11 MIB and one Symbol proprietary Symbol MIB Management Information Base The SNMP agent supports read write read only or disabled modes The AP supports traps that return to the SNMP manager when certain events occur The Wireless LAN Installation disk packaged with MUs contains the MIB Increased MIB Support The MIB Management Information Base has ten categories defining what the management station needs to understand and which objects the station manages Spectrum24 AP 4121HR Access Point Product Reference Guide Using the UI Introduction The UI User Interface is a maintenance tool integrated into the AP It provides statistical displays AP configuration options and firmware upgrad
98. m the ACL 1 Select Special Functions from the Main Menu 2 Select Clear ACL 2 8 6 Load ACL from MU List This option from the Special Functions menu takes all associated MUs and creates an ACL from them This builds an ACL without having to manually type addresses Edit the ACL using the add and delete functions 1 Select Special Functions from the Main Menu 2 Select Load ACL from MU List to add addresses of associated MUs to the ACL Spectrum24 AP 4121HR Access Point Product Reference Guide 87 Configuring the AP 2 9 Configuring Address Filtering 88 The AP can keep a list of MAC addresses of the MUs not allowed to associate with it The Disallowed Addresses option provides security by preventing unauthorized access by known devices Use it for preferred association of MUs to APs The maximum number of entries is 512 if no entries have been made for the ACL 512 is the number of entries available to both ACL and Disallowed Address Filtering entries e Select Set Address Filtering from the Main Menu to display Symbol Access Point QB QB QO QO QO QO QO QB QB QB QO DD QB QB QO QO QO QO QO SSSSSSSSSSSSRESREES F8 F8 F8 F8 F8 F8 F8 F8 F8 2F8 F8 F8 F8 F8 F8 F8 F8 F8 F8 Delete F1 208 208 218 203 TRE AG A2 208 786 2B BC 24 203 207 BC 228 2AG B9 Disallowed Addresses BA DO AD F8 FF FF C7 l DD AD F
99. monitoring statistics 107 mounting 136 Net_ID 8 network connection 134 power adapter 136 power options 135 PPP interface 77 PPP timeout 78 PSP 26 Radio Characteristics A 2 radio performance statistics 120 removing allowed MUs 86 removing disallowed MUs 89 RF statistics 120 roaming across routers 24 RSSI 23 serial port 48 shared key authentication 28 single cell connection 135 site survey 11 site topography 10 SNMP management 29 Supported Modems B 1 system password 46 system summary 107 TCP IP 37 Telnet 33 topologies 4 troubleshooting 140 Index 2 type filtering option 14 UI 31 Web browser 37 wired network 140 WNMP statistics 126 ACL 84 adding allowed MUs 86 configuring 84 disallowed address 13 enable disable 87 filtering 14 load ACL from MU list 87 removing allowed MUs 86 unauthorized access 13 address filtering 88 configuration 90 disallowed addresses 88 MAC addresses 88 remove MUs 89 advanced radio theory 12 MAC layer bridging 12 analyzing retries 129 antenna 135 AP antenna options 135 AP placement 135 site survey 134 Bridge Protocol Data Unit 9 DTIM 9 IEEE 802 1d Spanning Tree support 10 radio parameters 7 repeater 6 TIM9 wireless operation parameters 64 WLAP mode 6 9 109 WLAP mode LED display 138 Spectrum24 AP 4121HR Access Point Product Reference Guide WLAP priority value 10 WNMP function 7 AP installation 50 additional gateways 51 antenna selecti
100. n process 9 bridge 6 configuration 66 repeater 6 root AP 9 system summary 109 WLAP mode LED display special cases 139 WLAP priority configuration 66 Spectrum24 AP 4121HR Access Point Product Reference Guide Index 9 WNMP function X AP 7 Xmodem 96 Index 10 Spectrum24 AP 4121HR Access Point Product Reference Guide
101. n provides a facility to add MUs to the ACL 2 8 3 86 Note 1 Select the Set Access Control List option from the Main Menu to display Address Type range individual Use the UP DOWN ARROW keys to toggle between range and individual Select individual Press Add F2 The AP prompts for a MAC address DA DA BA 28 08 08 Enter the MAC address Users can enter MAC addresses without colons Select Save ALL APs F3 to save the Adding Allowed MU information to all APs with the same Net_ID ESS This option saves the configuration changes for the current AP and sends two WNMP messages to all other APs on the Known APs table to update their configuration and reset after the configuration has been modified Users can perform this option only among the same hardware platforms and firmware version Removing Allowed MUs The Allowed Mobile Units screen provides a facility to remove MUs from the ACL 1 2 Highlight the entry using the UP DOWN ARROW keys Press Delete F1 Spectrum24 AP 4121HR Access Point Product Reference Guide Configuring the AP 2 8 4 Enable Disable the ACL To switch between enable or disable locate the ACL in the System Configuration screen 1 Select Set System Configuration from the Main Menu 2 Press TAB to select Access Control 3 Press SPACE BAR to Enable 4 Select Save to save changes 2 8 5 Removing All Allowed MUs The AP provides a facility to remove all MUs fro
102. neeseseneneeecseneeeeeeaeees C 1 Appendix D Regulatory Compliance ccecececceceseeceseeeeeeeeseeeeseseeseeenees D 1 DY CI EEA AAE asc hse E E vem ee al bone ev aa ta nea ea E ee Index 1 viii Spectrum24 AP 4121HR Access Point Product Reference Guide Chapter1 Introduction Spectrum 24 is a spread spectrum cellular network that operates between 2 4 and 2 5 GHz gigahertz This technology provides a high capacity network using multiple access points within any environment The Symbol AP 4121 access point AP is a Spectrum24 direct sequence DS product Spectrum24 DS products use direct sequence technology to provide a high capacity high data rate wireless network Spectrum24 DS infrastructure products include e bridging architecture to provide communication between radio and wired multiple network segments e adesign based on the IEEE 802 11 standard e an 11 Mbps data rate for fast operation e seamless roaming for mobile users with devices such as laptops wireless PCs scanning terminals and other computers with PCMCIA slots 1 1 Access Point AP The Access Point AP provides a bridge between Ethernet wired LANs and Spectrum24 wireless networks It provides connectivity between Ethernet wired networks and radio equipped mobile units MUs MUs include the full line of Symbol Spectrum24 terminals PC Cards and PCI adapters bar code scanners third party devices and other devices The AP provides an 11 Mbps data trans
103. network topologies depend on the following factors e the AP function in the network e the data transfer rate e the wireless AP WLAP interface Spectrum24 AP 4121HR Access Point Product Reference Guide 3 Introduction eb A WLAP communicates only with its root AP through the wireless interface as Note discussed in The Root AP and Association Process on page 9 Select from the following topologies e A single AP used without the wired network provides a single cell wireless network for peer to peer MUs e A single AP can bridge the Ethernet and radio networks z Spectrum24 AP 4121HR Access Point Product Reference Guide Introduction e Multiple APs can coexist as separate individual networks at the same site without interference using different Net_IDs e Multiple APs wired together provide a network with better coverage area and performance when using the same Net_IDs Spectrum24 AP 4121HR Access Point Product Reference Guide 5 Introduction In WLAP mode a wireless AP to AP connection functions e as a bridge to connect two Ethernet networks as a repeater to extend coverage area without additional network cabling
104. nt Product Reference Guide 27 Introduction IEEE 802 11 defines two types of authentication Open System and Shared Key Open system authentication is a null authentication algorithm Shared key authentication is an algorithm where both the AP and the MU share an authentication key to perform a checksum on the original message By default IEEE 802 11 devices operate in an open system network where any wireless device can associate with an AP without authorization A wireless device with a valid shared key is allowed to associate with the AP Authentication management messages packets are unicast meaning authentication messages transmit from one AP to one MU only not broadcast or multicast 1 3 11 HTTP HTML Web Server Support 28 Hypertext Transfer Protocol HTTP is the native language of the Web The HTTP protocol makes requests from browsers the user to servers and responses from servers to browsers This function provides the user with a Web based format for configuration and firmware download Web pages are written in HTML Hypertext Markup Language HTML allows the user to create web pages containing text graphics and pointers or links to other web pages or elsewhere on the page or document Pointers are known as Uniform Resource Locators URLs A URL is essentially the name of the web page The URL consists of three parts e the protocol a scheme e the DNS Domain Name Server the machine where the page is located e t
105. obile IP Disabled Mobile Home MD5 key Default Interface Web Server Enabled MU MU Disallowed System Password Admin F4 OK ECR Save F1 Save All APs F2 Save then reset AP to take effect 52 Spectrum24 AP 4121HR Access Point Product Reference Guide Disabled Disabled Enabled Enabled On off On Ethernet off Cancel ESC Configuring the AP 2 Configure the direct sequence channel settings Frequency 2412 2470 2430 2447 2457 2463 2458 2472 2483 2485 Allowed Channel Range Country 1 11 United States 5 8 Israel 10 11 Spain 10 13 France 14 Japan 3 Configure the AP system settings as required Ethernet Timeout Disables radio interface if no activity is detected on Telnet Logins the Ethernet line after the seconds indicated 38 255 The AP disassociates MUs and prevents further associations until it detects Ethernet activity The default value s disables this feature The 1 value detects if the 10Base T line goes down If the value is set to 2 and the WLAP has connected to the Root AP the WLAP sends a WLAP Alive BPDU on the Ethernet line every WLAP Hello Time seconds to allow WLAPs on the Ethernet line to detect its existence If the value is set to 3 the WLAP tracks the WLAP Alive BPDU If the BPDU is missing for WLAP Hello Time seconds the WLAP state changes to WLAP Lost on Ethernet Once the WLAP Alive BPDU is detected the WLAP resets and starts over When the Ethe
106. ocate the receiving antenna e Increase the separation between the equipment and receiver e Connect the equipment into an outlet on a circuit different from that which the receiver is connected e Consult the dealer or an experienced radio TV technician for help Spectrum24 AP4121HR Access Point Product Reference Guide D 1 Regulatory Compliance Radio Frequency Interference Requirements Canada This Class A digital apparatus meets the requirements of the Canadian Interference Causing Equipment Regulations CE Marking amp European Union Compliance Products intended for sale within the European Union are marked with CE the CEMark which indicates compliance to applicable Directives and European Normes EN as follows Amendments to these Directives or ENs are included Normes EN as follows Applicable Directives e Electromagnetic Compatibility Directive 89 336 EEC e Low Voltage Directive 73 23 EEC Applicable Standards e EN 55 022 Limits and Methods of Measurement of Radio Interference Characteristics of Information technology Equipment e EN 50 082 1 Electromagnetic Compatibility Generic Immunity Standard Part 1 Residential commercial Light Industry e IEC 801 2 Electromagnetic Compatibility for Industrial Process Measurement and Control Equipment Part 2 Electrostatic Discharge Requirements e IEC 801 3 Electromagnetic Compatibility for Industrial Process Measurement and Control Equipment Part 3 Radiated
107. om an interface during initialization The WLAPs involved and the wireless operation state see 3 8 Radio Statistics on page 120 affect the WLAP Forward Delay time This delay ensures that all WLAP nodes are heard The default is 5 seconds per wireless operation state The WLAP Forward Delay of the Root AP overwrites the WLAP Forward Delay of designated WLAPs 68 Spectrum24 AP 4121HR Access Point Product Reference Guide Configuring the AP 2 5 2 Encryption Key Maintenance The Encryption Key Maintenance screens allow the user to configure the encryption keys used for the site network The WEP Algorithm used determines which encryption Key screen displays To enable the Open System option select Disabled for WEP privacy on the RF Configuration screen This table shows the AP association capability with the selected WEP Algorithm AP Selected WEP MU Selected WEP Association Status Algorithm Algorithm Open disable Open Associated Open disable 40 No Association Open disable 128 No Association 40 Open No Association 40 40 Associated 40 128 Associated but cannot transmit data 128 Open No Association 128 40 Associated but cannot transmit data 128 128 Associated Each 40 bit encryption key is a subset of the respective 128 bit encryption key The first 40 bits of each encryption key is the same for the respective 40 bit and 128 bit encryption keys When a 40 bit encryption key is changed the first 40 bits of th
108. on 51 gateway IP address 50 IP address 50 Net_ID 51 subnet mask 51 association process 21 beacon 26 Bridge Protocol Data Unit 9 CCA 22 direct sequence systems 20 DTIM 9 26 IEEE 802 1d Spanning Tree support 10 MU 21 MU ACK 22 roaming 21 root AP 9 RSSI 23 scanning 22 TIM 9 WLAP mode 9 WLAP priority value 10 auto fallback to wireless mode enabling 14 introduction 14 B Basic Service Set 8 BC MC Q configuration 59 beacon 26 CAM stations 26 PSP stations 26 TIM 27 Spectrum24 AP 4121HR Access Point Product Reference Guide bridge WLAP mode 6 bridging 16 data link bridge 16 Ethernet topologies 17 IP 17 Link Control Protocol 18 Network Control Protocol 18 PPP 17 radio coverage 16 TCP IP 17 telnet 17 bridging architecture 1 broadcast ESS ID 60 BSS_ID 8 C carrier signal 3 configuration 33 ACL 84 address filtering 88 BC MC Q 59 beacon interval 60 broadcast ESSID 60 data transmission rate 61 dial up connection 48 dial up system 49 DTIM packet frequency 59 Encryption Key Maintenance 69 manually updating AP firmware 93 maximum retries 59 Mobile IP 116 MU 60 multicast mask 59 PPP 76 PPP Direct 76 Index 3 radio parameters 7 58 resetting 106 restoring 106 saving 104 serial port connection 48 Setting Logging Options 91 SNMP agent 80 Special Functions 105 Strong Encryption 74 system parameters 52 System Password Administration 56 TCP IP 33 Telnet 33 UI 33 wireless operation parameters 64
109. on of devices subject only to the requirement that the total of the Load Numbers of all devices not exceed 100 The Load Number is located on a label on the product Contact your local Symbol Technologies Inc representative for service and support Symbol Technologies Inc Canadian Sales and Service 2540 Matheson Boulevard East Mississauga Ontario Canada L4W 4Z2 Phone 905 629 7226 Laser Devices Symbol products using lasers comply with US 21CFR1040 10 Subchapter J and IEC825 EN 60 825 or IEC825 1 EN 60 825 1 depending on the date of manufacture The laser classification is marked one of the labels on the product Class 1 Laser devices are not considered to be hazardous when used for their intended purpose The following statement is required to comply with US and international regulations l Use of controls adjustments or performance of procedures other than ae those specified herein may result in hazardous visible or invisible laser Caution light exposure Spectrum24 AP4121HR Access Point Product Reference Guide D 5 Regulatory Compliance Class 2 laser scanners use a low power visible light diode As with any very bright light source such as the sun the user should avoid staring directly into the light beam Momentary exposure to a Class 2 laser is not known to be harmful Laser information labels are found in the product Quick Reference Guide D 6 Spectrum24 AP4121HR Access Point Product Reference G
110. on of the AP Review AP firmware revisions and update procedures Verify network configuration by ensuring that there are no duplicate IP addresses Power down the device in question and ping the assigned address of the device Ensure no other device responds to that address 2 AP powered on but has no connection to the wired network Check connections for proper wiring 3 Verify network wiring and topology for proper configuration Check that the cables used have proper pinouts and connectors Verify router configuration and filtration setting Check that network band use does not exceed 37 of bandwidth Verify MU operations Confirm AP operation 140 Spectrum24 AP 4121HR Access Point Product Reference Guide Hardware Installation Confirm AP and MU Net_ID ESS Check that the radio driver loaded properly Check that the MU PROTOCOL INI or NET CFG file is compatible with the network operating system 4 Slow or erratic performance Check MU and RF communications range Check antenna connectors and cabling Verify that antenna diversity setting for AP is appropriate If using one antenna the setting is Primary Only if using both antennas the setting is Primary and Secondary Verify network traffic does not exceed 37 of bandwidth Check to see that the wired network does not exceed 10 broadcast messages per second Verify wired network topology and configuration 4 10 Setting Up MUs R
111. ontrol Protocol IPCP An AP using IPCP communicates on the IP level and receives and transmits IP Internet Protocol packets Spectrum24 AP 4121HR Access Point Product Reference Guide 17 Introduction Note The PPP implementation in the AP uses the Link Control Protocol LCP and Network Control Protocol NCP as described in e RFC 1171 the Point to Point Protocol July 1990 e RFC 1220 PPP Extensions for Bridging April 1991 e RFC 1332 The PPP Internet Protocol Control Protocol May 1992 e RFC 1661 The Point to Point Protocol July 1994 RFCs are Requests For Comments used in Internet Communities The AP database dynamically tracks MUs and APs on the PPP interface Packets forward to the PPP link after the AP determines their destination The PPP implementation in the AP uses the NCP as described in RFC 1220 PPP Extensions for Bridging to encapsulate packets at the Ethernet level The PPP provides IP bridging control as defined by RFC 1172 and MAC level bridging It provides support for PPP negotiations conforming to RFC 16617 Users cannot plug a non AP node directly into the AP serial port only AP to AP PPP links Refer to RFC 1171 The Point to Point Protocol and RFC 1220 PPP Extensions for Bridging for information 18 Spectrum24 AP 4121HR Access Point Product Reference Guide Introduction PPP Connection Connecting two APs with a direct serial link requires a null modem serial cable A
112. or Windows The wireless TFTP upgrade method requires a connection between the AP and a TFTP server The TFTP server can be running on a Symbol Spectrum24 device Updating the firmware requires a TFTP server running in the background To update the AP firmware 1 Copy the Firmware files DSAP_FW BIN and DSAP_HTM BIN on the terminal or PC hard disk 2 Telnet to the AP using its IP address Spectrum24 AP 4121HR Access Point Product Reference Guide 93 Configuring the AP 94 amp Note Note Note 3 At the prompt type the password Symbol The password is case sensitive Set the System Passwords in the Set System Configuration screen The AP displays the Main Menu Select Special Functions from the Main Menu Select Alter Filename s HELP URL TFTP and press ENTER D u Enter the firmware file name in the Download Filename field Change this only if the user or system network administrator requires a new file name The defaults are DSAP_FW BIN and DSAP_HTM BIN dsap_fw bin or dsap_htm bin Ensure the file name is DSAP_FW BIN and DSAP_HTM BIN unless the user changed the file name Verify the path for the file name is accurate See step one 7 Enter the TFTP Server IP address in the TFTP Server field 8 Press ENTER 9 Select Save Configuration to save settings Spectrum24 AP 4121HR Access Point Product Reference Guide Caution amp Note Note Configuring the AP
113. orm this option only among the same hardware platforms and firmware versions Select Cancel ESC to disregard any changes made to this screen and return to the previous menu Spectrum24 AP 4121HR Access Point Product Reference Guide Configuring the AP 2 13 Manually Updating AP Firmware To update Access Points with firmware and HTML file versions older than 1 50 the user must update the AP firmware and HTML files to version 1 50 first then update the firmware and HTML files to version 2 00 Conversely if the user wanted to downgrade the firmware and HTML files from version 2 00 to version 1 00 the user would need to downgrade the firmware and HTML files to version 1 50 first then downgrade the firmware and HTML files to version 1 00 When updating or downgrading the HTML files the user is required to use the Both option under the function heading Use XMODEM to Update Access Point s Both the firmware and HTML files are required to be loaded on the TFTP server or users hard disk Options for manually updating the firmware e A TFTP host e Any computer using the Xmodem file transfer protocol The files required for firmware updates are DSAP_FW BIN and DSAP_HTM BIN 2 13 1 Update using TFTP The Ethernet TFTP upgrade method requires a connection between the AP and PC on the same Ethernet segment Verify the PC has a TFTP server running on it Running the server requires third party software like FTP PC TCP for DOS or OnNet f
114. r short frame when the data has been received and is ready to go back to PSP A DTIM field also called a countdown field informs MUs of the next window for listening to broadcast and multicast messages When the AP has buffered broadcast or multicast messages for associated MUs it sends the next DTIM with a DTIM Interval value To prevent a PSP mode MU from sleeping through a DTIM notification select a PSP mode value less than or equal to the DTIM value PSP mode MUs hear the beacons and awaken to receive the broadcast and multicast messages Spectrum24 AP 4121HR Access Point Product Reference Guide Introduction ATIM is a compressed virtual bitmap identifying the AP associated MUs in PSP mode that have buffered directed messages MUs issue a poll request when APs issue a TIM A beacon with the broadcast indicator bit set causes the MU to note DTIM Count field value The value informs the MU of the beacons remaining before next DTIM This ensures the MU turns on the receiver for the DTIM and the following BC MC packet transmissions 1 3 10 Data Encryption Spectrum24 devices operating on a wired or wireless network face possible information theft This occurs when an unauthorized user eavesdrops on someone else to obtain information illegally The absence of a physical connection makes wireless links particularly vulnerable to this form of theft Encryption becomes the most efficient method in preventing information theft and improving data
115. red LANs Symbol recommends one LAN contain all the lower WLAP IDs Ethernet I D AD F8 00 18 1A DA AD F8 08 23 5D DO AD F8 18 21 9C l D Ethernet II Spectrum24 AP 4121HR Access Point Product Reference Guide 65 Configuring the AP To configure the AP for wireless operation 1 Select Set RF Configuration from the Main Menu 2 Configure the settings as required WLAP Mode WLAP Priority 66 Specifies the APs wireless AP operation status Enabled the AP sets up automatically for wireless operation The AP can operate in any of these configurations Wireless Repeater or Ethernet Bridge Disabled no wireless operation possible Default setting Link Required At power up e Ifthe WLAP is the Root AP an Ethernet connection is required e Ifthe WLAP is a designated WLAP association to the Root AP is required During normal operation e Ifthe Ethernet connection is lost the Root AP resets e Ifthe WLAP association is lost the designated WLAP resets Allows a user to determine the Root and the designated WLAP in wireless operation Concatenate the priority value as the most significant portion of the MAC address An AP with a lower numerical value for priority is more likely to become the root AP The default is 8888 hex from the 8 xFFFF range Spectrum24 AP 4121HR Access Point Product Reference Guide Configuring the AP WLAP Manual Specifies the BSS_ID of a particular WLAP and BSS_I
116. ring operation These statistics indicate traffic transmission success and the existence of other radio network devices Clear statistics as needed 3 1 System Summary The Show System Summary screen displays information about the APs configuration To view information about the AP configuration 1 Select Show System Summary from the Main Menu to display Symbol Access Point System Summary Unit Name Symbol Access Point MAC Address BSS Q A8 F8 88 C2 24 Access Control Disabled IP Address 157 235 92 156 WLAP Mode Enabled Net_ID ESS CA2 Model Number AP 4121 18 US Channel 3 Serial Number L498912 Hardware Revision 3 91 Country United States Antenna Selection Diversity On AP Firmware Ver 2 80 88 WEP Privacy Disabled RF Firmware Ver V2 80 14 WEP Algorithm 48 bit shared key HTML File Ver 82 88 1 Current MUs 5 Start Flashing All LEDs Total Assoc 4 Reset AP System Up Time 8 48 47 Exit LESC Spectrum24 AP 4121HR Access Point Product Reference Guide 107 Monitoring Statistics 2 Configure the AP system settings as required 108 Unit Name MAC Address BSS IP Address Net_ID ESS Channel Country Antenna Selection WEP Privacy WEP Algorithm Current MUs Total Assoc System Up Time Access Control Identifies the AP name Identifies the unique 48 bit hard coded Media Access Control address Identifies the network assigned Internet Protocol address Identifies the unique 32 character
117. rnet connection is broken the AP clears the MU table and disables the RF interface until the Ethernet connection comes up Specifies if the AP accepts or rejects Telnet Logins The default value is Enabled Spectrum24 AP 4121HR Access Point Product Reference Guide 53 Configuring the AP 54 Encryption Admin Agent Ad Interval 24 Mobile IP Mobile Home MD5 key MU MU Disallowed Web Server System Password Admin Access Control Type Filtering Indicates which interface can change the encryption keys and the encryption key index Without admin privileges users cannot change this parameter or view the encryption keys Any allows users with admin privileges to change encryption keys through any interface Serial allows users with admin privileges to change this parameter and encryption keys only through the Serial port Specifies the interval in seconds between the mobility agent advertisement transmission If enabled this feature allows MUs to roam across routers Secret key used for Mobile Home registration and authentication If enabled mobile units associated with the same AP are not allowed to communicate with each other Enables the use of a Web based browser to access the UI instead of HyperTerminal or Telnet applications An AP Reset is required for this feature to take effect Allows the user to change the passwords for the AP This screen can be accessed only when the AP is in Telnet mode Seri
118. rom for newly associated MUs The AP Regular screen shows the MUs associated locally on the same subnet Select Show Mobile Units from the Main Menu to display Symbol Access Point MAIN MENU Show System Summary AP Installation Show Interface Statistics Special Functions Show Forwarding Counts Set System Configuration Show Mobile Units Set RF Configuration Show Known APs Set Serial Port Configuration Show Ethernet Statistics Set Access Control List Show RF Statistics Set Address Filtering Show Misc Statistics Set Type Filtering Show Event History Set SNMP Configuration Enter Admin Mode Set Event Logging Configuration Regular Home Agent Foreign Agent Spectrum24 AP 4121HR Access Point Product Reference Guide Monitoring Statistics Use the TAB or arrow keys to highlight the desired screen Press ENTER to display the selected screen e Select Regular from the Mobile Units prompt to display Symbol Access Point Mobile Units DD AD F8 29 C9 E2 C R11 DD AD F8 10 4A 13 P R11 Information CR Echo F1 Timed F2 Next F3 Exit ESC The display shows the currently associated MUs listed by MAC address The list appears as follows addr p i e V Where addr MU MAC address in xx xx xx xx xx xx format p MUs power mode P for PSP C for CAM An unassociated MU does not display any character i MU location on AP interfaces R for radio P for PPR MUs with an A were associated with the AP in the past but no long
119. rough serial cable from the AP to the modem 2 Verify the modem connects to the telephone line and has power Refer to the modem documentation for information on verifying device power From the remote terminal start the communication program Select the correct serial port along with the following parameters emulation ANSI baud rate 19200 bps data bits 8 stop bits parity none flow control none 5 Dial out to the AP with the correct telephone number No password required 6 Press ESC to refresh the display The AP displays the Main Menu Hanging Up To hang up from the UI while connected 1 Select the Special Functions Menu from the Main Menu 2 Select Modem Hangup 2 2 4 Navigating the UI Using a Web Browser Refer to the online help file for information on Web Browser navigation and basic functionality For file download instructions and the associated file s refer to the Web page http www symbol com services downloads download _spec24 html and select Spectrum24 1 and 2 Mbps FH Firmware Software Drivers Tools and Spectrum24 AP 4121HR Access Point Product Reference Guide 49 Configuring the AP 2 3 Access Point Installation The AP UI includes an AP Installation screen supporting additional configuration to set basic parameters for a Spectrum24 network These parameters include designating a gateway address that provides the ability to forward messages across routers on the wired Ethernet
120. se the TAB or DOWN ARROW key to select the HELP URL field Type the IP address URL Universal Request Locator of the Web server and the directory folder of the Web server for the Help file location http xxx xxx xxx xxx WebHelp Where xxx xxx xxx xxx is the IP address of the server 6 Press ENTER Use the TAB or DOWN ARROW key to select 0K CR and press ENTER 8 Select the Save Configuration option to save the new setting Spectrum24 AP 4121HR Access Point Product Reference Guide 39 Configuring the AP 40 Note 9 Select Yes at the confirmation prompt 10 The Main Menu screen displays Reset the AP for changes to take effect 1 Select the Special Functions screen 2 Select Reset AP 3 Select Yes at the confirmation prompt To access the AP UI using a Web Browser from a workstation 1 From the NCPA properties window set the IP address of the workstation and the subnet mask The system tells the user to reboot for property changes to take effect The workstation in this case is the workstation or laptop computer running the Web browser 2 To verify the connection ping the AP At the default DOS prompt type Ping E XXX XXX XXX XXX Ifthe ping receives no response verify that the hardware connections IP address gateway address and subnet mask are correct If correct contact the site System Administrator for network assistance 3 Start a Web browser such as Internet Explorer 4 0 or great
121. security Encryption entails scrambling and coding information typically with mathematical formulas called algorithms before the information is transmitted over a network An algorithm is a set of instructions or formula for scrambling the data A key is the specific code used by the algorithm to encrypt or decrypt the data Decryption is the decoding and unscrambling of received encrypted data The same device host computer or front end processor usually performs both encryption and decryption The data transmit or receive direction determines whether the encryption or decryption function is performed The device takes plain text encrypts or scrambles the text typically by mathematically combining the key with the plain text as instructed by the algorithm then transmits the data over the network At the receiving end another device takes the encrypted text and decrypts or unscrambles the text revealing the original message An unauthorized user can know the algorithm but cannot interpret the encrypted data without the appropriate key Only the sender and receiver of the transmitted data know the key Symbol uses the Wired Equivalent Privacy WEP algorithm specified in IEEE 802 11 section 8 for encryption and decryption WEP uses the same key for both encrypting and decrypting plain text Typically an external key management service distributes the key Users should change the key often for added security Spectrum24 AP 4121HR Access Poi
122. sing collisions e the receiving station moving out of range e the receiving station being powered off Any one of these results causes both devices to suspend transmitting and retry later Too many retries can indicate a system problem To view retry severity 1 Select Show Misc Statistics from the Main Menu 2 Select Retry Histogram to display Retries Packets 5 65795 1 328 2 112 3 86 4 21 5 12 6 8 7 3 8 5 9 5 18 1 11 5 12 5 13 5 14 5 15 5 The display indicates the packets that experience retries up to 15 retries 3 Press any key to return to the Main Menu Spectrum24 AP 4121HR Access Point Product Reference Guide 129 Monitoring Statistics 3 10 Event History The AP tracks specific events The types of events logged are configurable The log is a 128 entry circular buffer After the 128th entry the earliest event entry deletes The Event History displays the most recent event at the top of the list Each event lists a time stamp recorded in hh mm ss from the time the AP powered up or reset The type of event logged follows the time stamp If the event involves an MU or AP the unit MAC address displays Symbol Access Point Event History pg 2 Warning Event logging is frozen while this screen is displayed Bae zvVanavee eaxweexeeaeaxeeaeaswves Previous F3 130 57 D6 D6 51 G1 G1 QB QB QB QB QB QB QB DD 20 U Assoc 6 A8 F8 12 59 C3 elnet Session Start From
123. t Change them as needed 4 Select 0k or Save to register settings by writing changes to NVM Selecting Save displays a confirmation prompt Spectrum24 AP 4121HR Access Point Product Reference Guide 83 Configuring the AP Select Save ALL APs F2 to save the SNMP Configuration information to all APs with the same Net_ID ESS This option saves the configuration changes for the current AP and sends two WNMP messages to all other APs on the Known APs table to update their configuration and reset after the configuration has been modified Users can perform this option only among the same hardware platforms and same firmware versions Select Cancel ESC to disregard any changes made to this screen and return to the previous menu 2 8 Configuring the ACL The ACL supports adding MU entries by individual MAC address or by a range of MAC addresses The maximum number of entries is 512 if no entries have been made for Disallowed Address Filtering Only 512 entries are available to both ACL and Disallowed Address Filtering 2 8 1 84 1 Select the Set Access Control List option from the Main Menu to display Address Type range individual Use the UP DOWN ARROW keys to toggle between range and individual Range of MUs To select a range of MAC addresses F Type in the minimum MAC address as the top value DA BA F8 F 1 01 Press ENTER to accept the value use the DOWN ARROW key to select the maximum value Typ
124. tended period When mail arrives for the individual home address it is forwarded by the local post office to the current care of address Using this method only the local post office requires notification of the individual current address While this example represents the general concept of Mobile IP operation and functionality it does not represent the implementation of Mobile IP used A tunnel is the path taken by the original packet encapsulated within the payload portion of a second packet to some destination on the network A Home Agent is an AP acting as a router on the MU home network The home agent intercepts packets sent to the MU home address and tunnels the message to the MU at its current location This happens as long as the MU keeps its home agent informed of its current location on some foreign link A Foreign Agent is an AP acting as a router at the MU location on a foreign link The foreign agent serves as the default router for packets sent out by the MU connected on the same foreign link A care of address is the IP address used by the MU visiting a foreign link This address changes each time the MU moves to another foreign link It can also be viewed as an exit point of a tunnel between the MU home agent and the MU itself The S24 Mobile IP roaming across routers feature enables an MU on the Internet to move from one subnet to another while keeping its IP address unchanged To configure this feature see 2 4
125. the 128 bit encryption key screen contact the Symbol Customer Support Center for a unique access code to enable this feature Spectrum24 AP 4121HR Access Point Product Reference Guide Configuring the AP Short RF Preamble Determines whether the AP uses a short or long preamble The preamble is approximately 8 bytes of the packet header generated by the AP and attached to the packet prior to transmission The preamble length is transmission data rate dependant The short preamble is 50 shorter than the long preamble This feature is only available to version 2 0 radio hardware Equipment without the version 2 0 radios can not enable the short preamble function and can not see receive or acknowledge messages from short preamble enabled version 2 0 hardware Disable this feature in a mixed hardware network and use the long preamble MUs and APs are required to have the same Short RF Preamble settings for interoperability The default is Enabled 3 Verify the values set reflect the network environment Change them as needed A Select 0k or Save to register settings by writing changes to NVM Selecting Save displays a confirmation prompt 5 Select Save ALL APs F2 to save the RF Configuration information to all APs with the same Net_ID ESS This option saves the configuration changes for the current AP and sends two WNMP messages to all other APs on the Known APs table to update their configuration and reset after the configura
126. the caching function for the browser being used For Netscape from the menu bar select Edit Properties and Advanced Cache Select Document in cache is compared to document on network Every time For Internet Explorer from the menu bar select View Internet Options Temporary Internet files and Settings Spectrum24 AP 4121HR Access Point Product Reference Guide 41 Configuring the AP Select Check for newer versions of stored pages Every visit to the page K If this property option is not turned off the browser returns the previous view of the page without the changes To ensure the latest version of a web page Not ee i oa ii is viewed set this option in the browser e To access help from any Spectrum24 Access Point Configuration Management System web page select the Help button located in the top right hand corner of each page e For access to the Easy Setup and Configuration pages this popup dialogue box appears Username and Password Required x Enter username for Secure Realm at 157 235 100 66 User Name Password Cancel 1 Type the AP name Symbol Access Point 2 Type the password Symbol eb The AP name and password are case sensitive Note Exit the browser to manually terminate the session 42 Spectrum24 AP 4121HR Access Point Product Reference Guide 2 2 Navigating the UI The AP displays a Main Menu when gaining access to the UI Symbol Access
127. the same hardware platforms and same firmware versions 5 Select ESC to disregard any changes made to this screen and return to the previous menu Spectrum24 AP 4121HR Access Point Product Reference Guide 75 Configuring the AP 2 6 Configuring PPP To use a PPP connection choose the hardware connection direct or modem and verify the enable status of serial port default in the System Configuration menu 2 6 1 PPP Direct A direct null modem serial cable connection between two APs From the UI 1 Select Set Serial Port Configuration from the Main Menu to display Symbol Access Point Serial Port Configuration Port Use PPP Answer Wait Time 68 Connect Mode Answer Inactivity Timeout 5 Modem Connected No PPP Timeout 3 Dialout Mode Auto PPP Terminates 18 Modem Speaker On Dialout Number 1234567 OK CR Save F1 Cancel ESC Use the space bar or left right cursor keys to change Set the Port Use parameter to PPP Verify that the Modem Connected parameter setting is No Set the Connect Mode parameter to Answer Har ggo Repeat for the other AP Set the other APs Connect Mode to Originate 76 Spectrum24 AP 4121HR Access Point Product Reference Guide Configuring the AP 2 6 2 Establishing Connection To establish the PPP port connection on both APs l 2 3 Select Set System Configuration from the Main Menu Set the PPP Interface to on Use the SPACE BAR or LEFT RIGHT arrow keys to change and press E
128. ting in the same area The access point is capable of an 11 Mbps data transmission rate but the coverage area is less than a 1 or 2 Mbps access point since coverage area decreases as bandwidth increases 1 3 7 MU Association Process APs recognize MUs as they associate with the AP The AP keeps a list of the MUs it services MUs associate with an AP based on the following conditions e the signal strength between the AP and MU e MUs currently associated with the AP e the MUs encryption and authentication capabilities and the type enabled e the MU supported data rate 1 Mbps 2 Mbps 5 5 Mbps or 11 Mbps MUs perform preemptive roaming by intermittently scanning for APs and associating with the best available AP Before roaming and associating with APs MUs perform full or partial scans to collect AP statistics and determine the direct sequence channel used by the AP Spectrum24 AP 4121HR Access Point Product Reference Guide 21 Introduction 22 Scanning is a periodic process where the MU sends out probe messages on all frequencies defined by the country code The statistics enable an MU to reassociate by synchronizing its frequency to the AP The MU continues communicating with that AP until it needs to switch cells or roam MUs perform full scans at start up In a full scan an MU uses a sequential set of channels as the scan range For each channel in range the MU tests for CCA Clear Channel Assessment When a transmission free chann
129. tion has been modified Users can perform this option only among the same hardware platforms and same firmware versions 6 Select Cance1 ESC to disregard any changes made to this screen and return to the previous menu Spectrum24 AP 4121HR Access Point Product Reference Guide 63 Configuring the AP 2 5 1 Wireless Operation Parameters The AP supports up to four WLAP interfaces Symbol recommends using one WLAP as an interface on high traffic networks for low traffic networks no more than two WLAPs because excessive channel contention causes the WLAP to miss beacons from the Root AP shown in the example Ethernet Ethernet A on High Traffic Network Low Traffic Network See 4 8 LED Indicators on page 137 for indication of AP status If more than two WLAPs operate in a repeater configuration Symbol recommends the WLAPs with the lowest WLAP IDs be placed on the wired network To avoid forming a loop per the IEEE 802 1d Spanning Tree Protocol the Wireless WLAP associates with only one wired WLAP 1 Set the default interface for AP A to Ethernet 2 Set the default interface for AP B to Ethernet 64 Spectrum24 AP 4121HR Access Point Product Reference Guide Configuring the AP 3 Set the default interface for AP C to WLAP This allows the MUs to roam and transmit data between AP B and C Ethernet I A B I O6 AG F8 08 23 5D gt DD AD F8 00 18 1A DA AD F8 18 28 8C If an AP functions as a bridge between wi
130. tion prompt 6 Select Cance1 ESC to disregard any changes made to this screen and return to the previous menu Spectrum24 AP 4121HR Access Point Product Reference Guide 47 Configuring the AP 2 2 3 Configuring for Dial Up to the Ul amp Note 48 A dial up connection requires a straight through cable between the modem and the AP The remote PC requires a modem and a communication program e g Microsoft Windows Terminal program See Appendix B Supported Modems for modems supported by the AP Configuring Serial Port To enable and configure the serial port connection on the AP 1 Select Set Serial Port Configuration from the Main Menu 2 Set the Port Use parameter to PPR 3 Set the Modem Connected parameter to Yes Configure the other settings as required on the AP Answer Wait Time The time waiting for a remote connection before dropping the attempt The default is 62 seconds from a 5 to 255 second range Modem Speaker AP sends a command to the modem to turn on off the modem speaker The default is on Inactivity Timeout The inactivity time on the UI that causes the AP to terminate the connection while using a modem The default is 5 minutes from a 0 to 255 minute range The 0 value indicates no time out Spectrum24 AP 4121HR Access Point Product Reference Guide Configuring the AP Configuring the Dial Up System Assuming the PPP serial port and answer mode are enabled on the AP 1 Attach a straight th
131. tions leave their radios on continuously to hear every beacon and message transmitted These systems operate without any adjustments by the AP A beacon is a uniframe system packet broadcast by the AP to keep the network synchronized A beacon includes the Net_ID ESS the AP address the Broadcast destination addresses a time stamp a DTIM Delivery Traffic Indication Message and the TIM Traffic Indication Map PSP Power Save Polling stations power off their radios for long periods When a Spectrum24 MU in PSP mode associates with an AP it notifies the AP of its activity status The Spectrum24 AP 4121 HR access point responds by buffering packets received for the MU The Spectrum24 adapters use a PSP performance index from 1 to 5 where 1 provides the quickest response time and 5 provides the most efficient power consumption The performance index determines how long the adapter stays in CAM after transmit or receive activity Regardless of the performance index used adapters switch to CAM for data reception transmission The awake interval in PSP performance index 1 is long enough to allow for round trip packet response times The packet response time in PSP performance index 5 is only 25 msec the adapter goes back to sleep and requires another wake up period to receive data When the MU wakes up and sees its bit set in the TIM it issues a short frame to the AP for the packets stored The AP sends them to the MU and the MU issues anothe
132. tly LED State Status On Wired LAN Activity Off Wireless LAN Activity Blinks slowly e Ifthe WLAP manual BSS_ID is set with the broadcast bit ON i e the first Byte is 81 and the specified WLAP not found the WLAP tries to associate with another WLAP If it still cannot find another WLAP it goes to Functional State e F the Ethernet Timeout in the System Configuration menu is set to 3 the WLAP will keep track of the WLAP Alive BPDU If the BPDU is missing for WLAP Hello Time seconds the WLAP state changes to WLAP Lost on Ethernet and the LEDs have the following states LED State Status On Wired LAN Activity Blinks slowly Wireless LAN Activity Off Spectrum24 AP 4121HR Access Point Product Reference Guide 139 Hardware Installation 4 9 Troubleshooting Check the following symptoms and their possible causes before contacting the Symbol Support Center 4 9 1 Ensure wired network is operating Verify AP operation 1 AP does not power up faulty AP power supply failed AC supply Electrical Management System EMS operating outlet 2 After the AP resets and hardware is initialized it performs an SRAM test If the test passes the LEDs turn on If the test fails the LEDs all turn off and the AP resets The LEDs turn off sequentially as each test passes Identify wired network problems 1 No operation Verify AP configuration through Telnet PPP or Ul Review procedures for Ethernet and serial connecti
133. to turn on or off the modem speaker The default is on Controls the time out between issuing a PPP packet and expecting a reply This is necessary if the serial connection has long delay periods The s value indicates no time out The default is 3 from a to 255 second range Controls the PPP terminate requests the AP issues when a PPP linked AP does not respond to a terminate request The AP closes the PPP connection after making the maximum requests The default is 18 from a to 255 terminate request range From the answering APs UI 1 Select Set Serial Port Configuration from the Main Menu Set the Port Use parameter to PPR Set the Modem Connected parameter to Yes 2 3 4 Set the Connect Mode to Answer 5 Configure the other required settings as on the originating AP 78 Spectrum24 AP 4121HR Access Point Product Reference Guide Configuring the AP 2 6 6 Initiating Modem Connection To manually initiate dial out from the originating AP to the answering AP 1 Select the Special Functions Menu from the Main Menu 2 Select Modem Dialout The AP dials out and attempts to make connection according to parameters set in Serial Port Configuration If dial out fails the AP switches to manual dial out For automatic dial out 1 Select the Serial Port Configurations screen from the Main Menu 2 Set the Dialout Mode to Auto 3 Select Save F1 to save the changes in NVM 4 Select the Special Functions screen from t
134. uide Index Numerics 10Base T connection 134 10Base T unshielded twisted pair 134 10Base T UTP 134 A access control 13 disallowed address 13 MU 13 unauthorized access 13 Access Control List 13 Access Point 1 10Base T connection 134 access control 108 Access Control List 1 adding allowed MUs 86 adding disallowed MUs 89 advanced radio theory 12 analyzing retries 129 antenna selection 108 ARP request packet 13 ARP response packet 13 Basic Service Set 8 bridging 16 BSS _ID 8 CAM 26 cell 8 cellular coverage 8 Characteristics A 1 chipping sequence 20 clear statistics 131 clearing MUs 90 clearing statistics 131 configure 24 country code 108 data encryption 2 data rate 1 decryption 27 dial up access 31 direct sequence 21 disallowed address 13 encryption 27 Ethernet device 3 Ethernet statistics 118 Ethernet traffic 1 Ethernet wired LANs 1 event history 130 Extended Service Set 8 features 2 filtering 14 firmware version 109 foreign agent 112 116 forwarding counts 111 hardware installation 133 hardware version 109 home agent 116 HTML 28 HTTP 28 IEEE 802 118 interface 110 interface statistics 110 Internet Protocol Control Protocol 17 Introduction 1 known APs 117 LED indicators 137 Spectrum24 AP 4121HR Access Point Product Reference Guide Index 1 MAC address 12 management options 29 manually updating the firmware 93 media types 15 miscellaneous statistics 126 Mobile IP 24 model number 109
135. uired data rate RTS Threshold Request to send threshold 256 2347 Allows the AP to use RTS Request To Send on frames longer than the specified length The default is 2347 Bytes CCA Mode Clear Channel Assessment CCA mode is the method used to detect transmissions from sources other than the access point The default is Carrier Sense CCA Energy The energy threshold or level above which the Threshold airwaves are considered busy The default is 62 WEP Privacy Defines the WEP algorithm Admin privileges are required to make changes to this parameter The default is Disabled Spectrum24 AP 4121HR Access Point Product Reference Guide 61 Configuring the AP 62 WEP Algorithm Encryption Key ID Encryption Key Maintenance Enable Strong Encryption Defines the number of bits and type of WEP algorithm used Admin privileges are required to make changes to this parameter The default is 48 bit shared key Allows the user to change the Active Key number Admin privileges are required to make changes to this parameter The default key ID is 1 Reset the AP for the new key value to become the active key Allows the user to create or change the values for each encryption key Admin privileges are required to make changes to this parameter Allows access to and use of the 128 bit encryption keys Some countries will not have access to the 128 bit encryption screens due to encryption export restrictions To access
136. ully transmitted Succ Frag Packets fragmented packets successfully transmitted Unsucc Frag Packets fragmented packets unsuccessfully transmitted Fragments Sent packet fragments transmitted Packets w o Retries transmitted packets not affected by retries Packets w Retries transmitted packets affected by retries Packets w Max Retries transmitted packets affected by the maximum limit of retries Total Retries Retries occurring on the interface A retry occurs if the device fails to receive an acknowledgment ACK from a destination Data Packets Revd total data packets received Data Bytes Revd total data packets received in bytes BC MC Packets Revd broadcast multicast user data packets successfully received BC MC Bytes Rcvd broadcast multicast user data bytes successfully received Sys Packets Revd system packets successfully received SBC MC Packets Revd broadcast multicast system packets successfully received Succ Reass Packets packets successfully reassembled Unsucc Reass Packets packets unsuccessfully reassembled Spectrum24 AP 4121HR Access Point Product Reference Guide 121 Monitoring Statistics 122 Fragments Rcvd Rev Duplicate Pkts Undecryptable Pkts Rev CRC Errors Rev ICV Errors packet fragments received Duplicate packets received by the AP This indicates the AP sent an ACK but the MU did not receive it and transmitted the packet again total data packets that could not be decrypted Packets re
137. update the AP firmware 1 Copy the firmware files DSAP_FW BIN and DSAP_HTM BIN to the PC hard disk that runs a terminal emulation program 2 Attach a null modem serial cable from the AP to the PC serial port 3 On the PC start the communication program 4 Name the session Spectrum24 AP and select OK eb The procedure described below is for Windows 98 Note 5 Select the correct communication port typically Direct to Com1 along with the following parameters emulation ANSI baud rate 19200 bps data bits 8 stop bits 1 parity none flow control none 6 Select OK 7 Press ENTER to display the Main Menu 96 Spectrum24 AP 4121HR Access Point Product Reference Guide Note Note ay Caution Configuring the AP 8 Select Enter Admin Mode and type the password Symbol The password is case sensitive 9 Enter the Special Functions screen 10 Under the function heading Use XMODEM to Update Access Point s select Firmware HTML or Both 11 Press ENTER Selecting Both downloads the files DSAP_FW BIN and DSAP_HTM BIN files separately Ensure both files are located in the same directory before the download begins 12 At the confirmation prompt press Y to display Downloading firmware using XMODEM Send firmware with XMODEM now Where DSAP_FW BIN and DSAP_HTM BIN are the firmware files When using Xmodem verify the accuracy of the file before a send An incorrect file can render
138. uration Protocol DHCP to obtain a leased IP address and network configuration information from a remote server DHCP is based on BOOTP protocol DHCP can coexist or interoperate with BOOTP An AP sends out a DHCP request searching for a DHCP server to acquire the network configuration and firmware filenames Because BOOTP and DHCP interoperate the one that responds first becomes the server that allocates information The DHCP client automatically sends a DHCP request every XX hours days to renew the IP address lease as long as the AP is running This parameter is programmed at the DHCP server Example Windows NT servers typically are set for 3 days The AP can optionally download two files when a boot takes place the firmware file and an HTML file Users can program the DHCP or BOOTP server to transfer these two files when a DHCP request is made 14 Spectrum24 AP 4121HR Access Point Product Reference Guide Introduction When the AP receives a network configuration change or is not able to renew the IP address lease the AP sends out an SNMP trap eb Mobile IP is not available when DHCP is used Disable DHCP support when Note configuring an AP and mobile device for Mobile IP 1 3 4 Media Types The AP supports bridging between Ethernet radio and serial media The Ethernet interface fully complies with Ethernet Rev 2 and IEEE 802 3 specifications The AP supports 10Base T wired connections and full speed filtering The data trans
139. value is Disabled Send a trap to the manager for radio restart The default is value Disabled Send a trap to the manager when an ACL violation occurs The default value is Disabled The Trap Host manager IP address The default is 0 0 0 0 The Trap Host2 manager IP address The default is 0 0 0 0 Spectrum24 AP 4121HR Access Point Product Reference Guide Configuring the AP DHCP Change If enabled this trap generates the following enterprise specific traps e Gateway Address change Indicates the gateway address for the router has changed e IP Address Change Indicates the IP address for the AP has changed e IP Address Lease is up Informs the user the IP address leased from the DHCP server is about to expire WLAP If enabled this trap generates the following enterprise Connection specific traps Change Root WLAP Up Indicates that the Root AP connection is setup and ready to forward data e Root WLAP Lost If the current WLAP fails to receive a Beacon packet from its Root AP within one second it considers the Root AP lost The WLAP eventually resets itself to reestablish the network topology e Designated WLAP Up Indicates that the Designated WLAP connection is setup and ready to forward data e Designated WLAP Lost If the current WLAP fails to receive a Config BPDU packet from its Designated WLAP for MAX AGE time it considers the Designated WLAP lost 3 Verify the values reflect the network environmen

Spectrum24 AP-4121HR Access Point

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