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3Com 2226 PLUS Owner's Manual

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2. Create User This page allows you to create a user and define the access level and password for that user Figure 16 Create User Screen ve Say Create User Username 1 8 chars Access Level Monitor z Password 1 8 chars Confirm Password Ri Carta Summary User Name Access Levol admin Ranagement guest Ronitor Administration Settings 39 Modify User This page allows you to modify a user s access level and password Figure 17 Modify User Screen Modify User CITE NE Users Summary User Access Level admin Management guest Monitor Username Access Level Monitor Password Modify Password Confirm Password 8 Character Maximum 40 CHAPTER 4 CONFIGURING THE SWITCH Remove User To remove a user from the Switch click on the user name then click Remove Figure 18 Remove User Screen D Remove use SE Remove User s User Name Access Level Management guest Monitor Select user s from the list above and click Remove to remove the User s System Time Click Administration then System Time on the menu This screen allows you to set the system time You can set the Year Month Day Hours Minutes and Seconds Figure 19 System Time Screen Set up the system time manually Hours Minutes Seconds Month Day Year Apply Cancel SNMP Simple Network Management Protocol SNMP is a communication protocol designed specifi
3. Cable Fault Distance C Lost Update Feature Summary Parts Value Diagnostics Use the Diagnostics tab to display individual port information on Test Result Cable Fault Distance and Last Update Monitoring 71 Figure 62 Cable Diagnostic Screen SSM oe Select a Port BONE BASE E c3 ET C3 Tese Result test yet cable Fault Distance Last 72 CHAPTER 4 CONFIGURING THE SWITCH 5 This chapter lists some issues that you may encounter while installing using and manag ing the Switch with suggested courses of cor rective action to take If you encounter an issue that is not listed here and you cannot solve it check the 3Com Knowledgebase at http knowledgebase 3com com before contacting your local technical support representative For more information on how to obtain support for your Switch refer to Appendix A TROUBLESHOOTING Resetting to Factory Defaults If the Switch does not operate normally or if the firmware becomes corrupted you can reset the Switch to factory defaults CAUTION Resetting the Switch to factory defaults erases all your settings You will need to reconfigure the Switch after you reset it To reset the Switch to its factory defaults Using the tip of a pen or a similar object press the Recovery button on the rear panel of the Switch See Figure 1 for illustration Power off the Switch and then power it ba
4. Any network users that are currently accessing the Internet will have their access interrupted while the reboot takes place and they may need to restart their computers when the reboot has completed and the Switch is operational again CHAPTER 4 CONFIGURING THE SWITCH System Access Click Administration then System Access on the menu A screen appears with six system access tabs m User Summary m Create User m Modify User m Remove User To prevent unauthorized users from accessing the Web interface and modifying the Switch s settings the interface is password protected The default admin account settings are m User name admin m Password blank no password To ensure that unauthorized users do not access the Web interface 3Com recommends that you set an admin password when you first configure the Switch Even if you do not intend to actively manage the switch 3Com recommends that you gt gt User Summary ERSTE change the password to prevent unauthorized access to your network The password can be up to 8 characters long and is case sensitive If you forget the administration password after you set it refer to Forgotten Password on page 74 for information on how to regain access to the Web interface User Summary Displays the list of user names and their access level Figure 15 User Summary Screen Modify User Remove User Users Summary User Name Admin guest
5. Range 1 65535 Default 30 seconds After you have filled in the parameters click Apply to save your changes 70 CHAPTER 4 CONFIGURING THE SWITCH Figure 59 802 1X Setup Screen o O 802 1x System Setting System Authortication D soblod gt Port Settings Operation Mode No Chenge 2 Mode No Chenge Maumum Request ModoRomghestication No Chenge Max Count Reauthentication Penod Quiet Period T Transmit Penod OO OON OCIO eee RE Cancel Monitoring Using the Web interface you can display address table information and cable diagnostics The Monitoring menu includes two items m Address Table m Cable Diagnostics Address Table Use the Address Table Summary screen to display the Address Table information You can query by selecting a port choosing a VLAN or entering in a MAC Address then click Select Figure 60 Address Table Screen Feature Summary Port MAC Address Statue 5 00 01 00 48 02 9 1 Dynamic Cable Diagnostics The Switch provides cable diagnostic which helps you detect and resolve issues with the attached cables The Cable Diagnostics menu includes two tabs m Summary m Diagnostics Summary Use the Summary tab to display information on Test Result Cable Fault Distance or Last Update for every port on the switch Figure 61 Cable Diagnostic Summary Screen acc Summary Select Feature Test Result
6. last two bytes of its MAC address 34 CHAPTER 4 CONFIGURING THE SWITCH To determine the exact IP address that the Switch assigns to itself during auto IP configuration check the sticker on the base of the Switch This sticker contains the MAC address and default IP address of the Switch To detect its IP information using the automatic configuration process the Switch goes through the following sequence of steps The Switch tries to configure itself with the default IP address 169 254 x y where x and y are converted from the last two bytes of its MAC address For example if the MAC address is 08004E000102 the IP address would be 169 254 1 2 This address is used if the Switch is operating in a standalone mode or no other switches on the network have this IP address The Switch also assigns the subnet mask 255 255 0 0 default class B mask to itself If this default IP address is already in use on the network then the Switch detects this and increments the last byte of the MAC address by one to generate its IP address The IP address would therefore become 169 254 1 3 3 gt The Switch repeats step 2 until an unused IP address is found 3Com recommends using automatic IP configuration only for the initial setup Once you gain access to the console you should assign an IP address to the Switch either by using DHCP or assigning a static IP address to ensure successful communication between the Swi
7. Apply Cancel Port Setup Use the Port Setup tab to configure the port or trunk setting for Voice VLAN The following options are available m Voice VLAN Port Mode Select between None Manual or Auto m Voice VLAN Port Security Enable or disable the security 64 CHAPTER 4 CONFIGURING THE SWITCH To configure the Voice VLAN settings for ports 1 Select Voice VLAN Mode and Security settings 2 Select the ports you would like to apply these settings to 3 Click Apply Figure 51 QoS Port Setup Screen Summary Setup Port Setup Port QU Summary QU Mader 3COM Voice VLAN Port Settings Veice VLAN Port Mode No Changes VelceVLAN Port Security No Changes Select AFFEN DEREN e Selected Ports Select AN Cancel Port Detail Use the Port Detail tab to display the Voice VLAN information for selected ports Figure 52 QoS Port Detail Screen Summary Setup Pon Setup Port Detail Gul Summary OUI ICOM Voice VLAN Port Detail Select Pont Ore EX ON OCDE OIL CUI kE CC NE OUI Summary Use the OUI Summary tab to display the list of Organizational Unique Identifier for a company and their description Figure 53 QoS OUI Summary Screen Summary Setup Port Setup Port Detail OUI Summary OUI Modify OUI List Telephony OUNs Description 00 F0 BB 00 00 00 3Com phone 00 03 68 00 00 00 Cisco phone 00 0 75 00 00 00 Polycom phon
8. Philippines 1235 61 266 2602 or 1800 1 888 9469 PR of China 800 810 3033 Singapore 800 6161 463 S Korea 080 333 3308 Taiwan 00801 611 261 Thailand 001 800 611 2000 You can also obtain support in this region using the following e mail apr technical support 3com com Or request a repair authorization number RMA by fax using this number 65 543 6348 Europe Middle East and Africa Telephone Technical Support and Repair From anywhere in these 44 0 1442 435529 regions call From the following countries you may use the numbers shown Country Telephone Number Austria 0800 297 468 Belgium 0800 71429 Denmark 800 17309 Finland 0800 113153 France 0800 917959 Germany 0800 182 1502 Hungary 06800 12813 Ireland 1 800 553 117 Israel 1800 945 3794 Italy 800 879489 Luxembourg 800 23625 Netherlands 0800 0227788 Norway 800 11376 Poland 00800 4411 357 Portugal 800 831416 South Africa 0800 995 014 Spain 900 938 919 Sweden 020 795 482 Switzerland 0800 553 072 U K 0800 096 3266 You can also obtain support in this region using the following URL http emea 3com com support email html 80 APPENDIX A OBTAINING SUPPORT FOR YOUR PRODUCT Country Telephone Number Country Telephone Number Latin America Telephone Technical Support and Repair Puerto Rico AT amp T 800 998 2112 Saba Anquila AT amp T 800 998 2112 Antigua Barbuda AT amp T 800 988 2112 St Kitts Neives AT amp T 800 998 2112 Argentina Loca
9. The link is operating at 1000 Mbps Yellow The link is operating at 10 or 100 Mbps Flashing Packets are being received or transmitted on the Green port at 1000 Mbps Flashing Packets are being received or transmitted on the Yellow port at 10 or 100 Mbps 12 INTRODUCING THE BASELINE SWITCH Off The link has not been established either nothing is connected to the port or there is a problem m Check that the attached device is powered on m Check that the cable or fiber is the correct type and is not faulty m For fiber connections ensure that the receive RX and transmit TX cable connectors are not swapped If these checks do not identify the cause of the problem it may be that the unit or the device connected to the port is faulty Contact your supplier for further advice 10 100BASE TX Ports Status Meaning Green The link is operating at 100 Mbps Yellow The link is operating at 10 Mbps Flashing Packets are being received or transmitted on the Green port at 100 Mbps Flashing Packets are being received or transmitted on the Yellow port at 10 Mbps gt Off The link has not been established either nothing is connected to the port or there is a problem m Check that the attached device is powered on m Check that the cable or fiber is the correct type and is not faulty For fiber connections ensure that the receive RX and transmit TX cable connectors are not swapped If these che
10. Use the Detail tab to display the RADIUS Client settings Figure 55 RADIUS Client Detail Screen Detail Configure Primary Auth IP 0 0 0 0 Port 1812 Second Auth IP 0 0 0 0 Port 1812 Auth Server Encryption Key TimeOutValue in second 5 RetryTimes 2 Configure Use the Configure tab to configure the RADIUS settings The following parameters are available m Max Retries Sets the number of retries of sending authentication requests m Timeout Sets the interval between sending authentication requests m P Address The IP address of the RADIUS server m UDP port The RADIUS server UDP port used for authentication messages m Key Sets the RADIUS encryption key After you have filled in the parameters click Apply to save your changes Figure 56 RADIUS Client Configure Screen Radius configuration parameters Max Retries 2 Timeout 5 default 2 secs 1 30 default 5 secs 1 565535 Primary Authentication IP Address 0 0 0 0 UDP pot 1812 default 1812 Secondary Authentication IP Address 0 0 0 0 UDP pot 1812 default 1812 Key 0 48 Verify Key 0 48 Apply Cancel Security 67 802 1X Settings The IEEE 802 1X dot1x standard defines a port based access control procedure that prevents unauthorized access to a network by requiring users to first submit credentials for authentication The 802 1X settings menu includes thr
11. a duplex mismatch This can result in a significant reduction in network performance If you are unsure of how to configure the speed duplex setting simply enable autonegotiation for the port You cannot modify the speed duplex settings of ports that are members of a trunk or aggregated link Supported SFP transceivers only operate at 1000 Mbps full duplex Inserting an SFP transceiver into a gigabit port disables the corresponding RJ 45 port even if no fiber cable is inserted 56 CHAPTER 4 CONFIGURING THE SWITCH Link Aggregation Link aggregation also called trunking refers to bonding multiple ports into a single group to effectively combine the bandwidth into a single connection or a trunk If you are connecting the Switch to another switch or to an Internet backbone you can aggregate links on the Switch to increase throughput and prevent packet loopback between switches For link aggregation to work the trunks must be configured on both ends switches Guidelines for Creating Trunks m Any port on the Switch can be used for creating a trunk m This switch supports a maximum of four trunks m Each trunk may contain up to four members m A port may only be a member of one trunk at any one time m All ports in a trunk must be configured in an identical manner including communication mode that is speed duplex mode and flow control Four tabs are available on the Port Link Aggregation page
12. and then click Next If the computer has only one adapter click Next Discovery searches the network for 3Com devices When detection is complete the Discovered Devices screen displays detected network devices Figure 5 Discovered Devices Screen Discovery 6 0 Discovered Devices Please choose a Device to configure Product Code Product Name IP Address Serial Number XT 3C16475CS Switch 2226 Plus 192 168 1 102 TUHF24B000002 Back Cancel 3 On the Discovered Devices screen click Baseline Switch 2226 Plus and then click Next The Completing the 3Com Discovery Application screen appears 4 Click Finish The logon dialog box for the Web interface appears Logging On to the Web Interface 25 Logging On to the Web Interface After the Web interface loads in your Web browser the first page that appears is the logon screen On this screen you need to enter the administration user name and password to gain access to the Web interface The logon screen also displays the IP address that the Switch is currently using Figure 6 Logon Dialog Box lt Web user login User Name Password To log on to the Web interface 1 In User name type admin 2 Leave the Password field blank 3 Click OK 26 CHAPTER 3 CONNECTING TO THE WEB INTERFACE Figure 7 Switch Screen Layout Sub Menu Tabs Navigating the Web Interface The Web interface has been designed
13. are available on the Web interface m A computer that is connected to the Switch and that has a Web browser The following topics are covered for Accessing the Web Running the Discovery Application m The 3Com Baseline Switch 2226 Plus CD ROM Running the Discovery Application contains among others the Discovery m Logging On to the Web Interface application m Navigating the Web Interface 24 CHAPTER 3 CONNECTING TO THE WEB INTERFACE The Discovery application can be used for detecting and connecting to the Switch on the network The application will launch a Web interface that provides the user with options to configure modify and upgrade the Switch To use Discovery to connect to the Web interface do the following On a computer that is connected to the Switch insert the CD ROM into its CD drive Discovery should start automatically If it does not start automatically go to the Discovery folder on the CD ROM and then double click discovery exe The Welcome screen of Discovery appears Figure 4 Welcome Screen of Discovery Welcome This application will help you to find and configure your 3Com product Please select the network interface that your product is connected to 5 0 driver IP address of adapter 192 158 1 2 2 If the computer has multiple network adapters select the adapter that connects the computer to the Switch
14. configuration on this device Please reboot the device to activate the new configuration Source File Browse Cancel 36 CHAPTER 4 CONFIGURING THE SWITCH 2 Click Browse to locate the backup file on your Figure 14 Upgrade Screen computer to restore the configuration settings rentrer a This operation will upgrade the current firmware via HTTP 3 C lick Restore to the config u ration back to Please Reboot the device to activate the new firmware the Switch NOTE During the firmware upgrade the switch may not respond to commands for a couple of minutes This is normal Do not turn the Switch off during this time For security purposes restoring the od configuration does not change the password Cancel Firmware Upgrade The Upgrade facility allows you to install on the 1 Click Administration then Firmware Upgrade Switch any new releases of system firmware on the menu The Firmware Upgrade screen that 3Com may make available Newer versions of firmware can be downloaded via HTTP and copied to the Switch the Switch will restart and apply the newer system firmware version appears Once you have downloaded the firmware use the Browse button to locate the file on your computer and then click OK You may need to change the file type in the dialog box displayed by your Web browser to to be able to see the file The file will be copied to the Switch and once this has
15. conventions F Fast Ethernet 86 FCC statement 91 Feedback about this User Guide 8 forgotten IP address 74 forgotten password 74 front panel diagram 10 full duplex 87 IEEE 87 IETF 87 IP address auto configuration 33 modifying 33 IP defined 87 ISP defined 87 G Gigabit Ethernet 86 L LAN defined 87 LED issues 74 link aggregation 56 local area network 87 M MAC address 88 media access control 88 monitoring traffic 61 62 94 INDEX N network analyzer 61 62 network defined 88 P password changing 38 default blank 38 setting 32 port settings configuring 53 62 65 positioning the Switch 15 POST 18 protocol defined 88 R resetting to factory defaults 73 RJ 45 defined 88 S server defined 89 SFP transceivers approved supported 19 inserting 19 removing 20 spot checks 21 subnet mask 89 Switch positioning 15 switch defined 89 T TCP IP 87 defined 89 technical specifications 81 traffic 89 monitoring 61 62 troubleshooting 73 forgotten IP address 74 forgotten password 74 LED related issues 74 POST failed 19 trunking See link aggregation U user name default 38 V viewing status information 31 VLANs 42 creating 49 maximum supported 42 sample configurations 47 Web interface accessing directly 30 accessing using Discovery 23 buttons 29 connecting 23 logging on 25 menu 26 navigating 26 requirements for accessing 23
16. for each network segment All other ports are blocked which means that they are prevented from forwarding traffic To use spanning tree choose enabled from the drop State down menu fill in the setup parameters and click Apply Figure 33 Spanning Tree Screen State Enable Priority D 61440 in steps of 4096 32768 STP Version STP Hello Time REN 1 10 seconds Fordwarding Delay fs 4 30 seconds Max Aging Time 6 40 seconds Path Cost Method Short v Transmission Limit fo IGMP Snooping This switch uses IGMP Internet Group Management Protocol to query for any attached hosts that want to receive a specific multicast service It identifies the ports containing hosts requesting to join the service and sends data out to those ports only It then propagates the service request up to any neighboring multicast switch router to ensure that it will continue to receive the multicast service This procedure is called multicast filtering The purpose of IP multicast filtering is to optimize a switched network s performance so multicast packets will only be forwarded to those ports containing multicast group hosts or multicast routers switches instead of flooding traffic to all ports in the subnet VLAN Choose enable or disable from the IGMP Snooping Mode drop down menu Configuring VLANs 51 Figure 34 IGMP Snooping Setup Screen Setup IGMP Snooping Mode Enable x Apply Cancel IGMP Que
17. full duplex mode In such a configuration you may notice some degradation of network performance 3Com recommends that you use devices that are capable of auto negotiation and that you ensure that auto negotiation is enabled if it is a configurable option 2 Gigabit Combo Ports RJ 45 SFP The Gigabit combo ports RJ 45 Small Form Factor Pluggable SFP ports are numbered 25 and 26 If the link connections on the SFP ports are active the associated RJ 45 port of the same number is disabled The two SFP ports support fiber Gigabit Ethernet short wave SX and long wave LX SFP transceivers in any combination This offers you the flexibility of using SFP transceivers to provide connectivity between the Switch and remote 1000 Mbps workgroups or to create Physical Features 11 a high capacity aggregated link backbone connection The default active port is the SFP port The selection of active ports can be configured via the Web interface The SFP port supports full duplex mode only SEP ports are numbered 25 and 26 on the Switch When an SFP port is active it has priority over the 10 100 1000 port of the same number The corresponding 10 100 1000 port is disabled when an SFP link connection is active 3 Link Activity Status LEDs The first top and third row of LEDs which are colored yellow or green show the link activity and speed status of the related ports 10 100 1000BASE T Ports Status Meaning Green
18. information m Create a new user m Modify existing users m Remove existing users Allows you to set the system time Contains tabs that allow you to a Display SNMP summary a Add community strings m Remove community strings Configures the device Contains tabs that allow you to m Create a VLAN m Modify VLAN m Modify VLAN membership for a port m Rename a VLAN m Remove a VLAN a Display VLAN membership for a port a Display VLAN information Allows you to configure a Spanning Tree Protocol 28 CHAPTER 3 CONNECTING TO THE WEB INTERFACE Menu Item Description Menu Item Description IGMP Snooping IGMP Query Broadcast Storm Port Administration Link Aggregation Spanning Tree per Port Allows you to enable or disable IGMP snooping Allows you to enable or disable IGMP query mode Allows you to enable or disable rate limiting Configures the ports Contains tabs that allow you to a Display selected port information for the entire Switch Display individual port information a Modify the port settings Contains tabs that allow you to Display link aggregation summary m Create an aggregation group m Modify the port memberships m Remove an aggregation group Contains tabs that allow you to m Display selected spanning tree information for every port Display individual port spanning tree information a Modify the spanning tree setti
19. takes all the traffic going in and out of the monitor port and copies it to the analysis port higher bandwidth than the mirror port Otherwise the Switch may not be able to copy all traffic effectively during periods of high traffic i CAUTION The analyzer port should have a Configuring Port Settings 61 Figure 47 Port Mirroring Setup Screen Mirroring Setup Port Traffic Monitoring All traffic transmitted and received on the monitor port will be copied to the analyser port Monitor Port Analyser Port NoNE gt Mirror NoNE gt Apply Cancel To set up port mirroring 1 Connect a network analyzer to a port 2 Access the Web interface Click Port then Port Mirroring on the menu The Port Monitoring Setup Screen appears 3 Select the port number under Monitor Port to which you want to monitor Traffic to and from this port will be forwarded to the analyser port 4 Select the port number under Analyser Port to which you connected the network analyzer Traffic to and from the selected mirrored ports will be forwarded to this port 5 Under Mirror Type select to monitor incoming traffic outgoing traffic or both 6 Click Apply 62 CHAPTER 4 CONFIGURING THE SWITCH Statistics The Switch allows you to statistics of a particular port Figure 48 Port Statistics Screen Same Select Pon s Retrosh 00 Seconds 0 Kcharmer 1 Note Que
20. to enable you to easily perform advanced configuration tasks and view information about the Switch Menu The menu is located on the left side of the Web onc interface When you click an item on the menu the related screen appears in the main part of the interface Some menu items will give you sub menu tabs to choose from Menu System Information Table 1 lists the available items on the menu Table 1 Available Menu Items Menu Item Description Menu Item Navigating the Web Interface 27 Description Device Summary Save Configuration Administration IP Setup Backup Configuration Restore Configuration Firmware Upgrade Initialize Reboot Contains tabs that allow you to m Provide a summary of the Switch s basic settings and versions of current components m Set the polling interval in seconds a Display the description for each color coded port Saves the Switch s configuration Manages the device Allows you to setup modify or view the IP configuration parameters Allows you to backup the Switch s configuration Allows you to restore a saved configuration Allows you to upgrade the current firmware via HTTP Allows you to reset the Switch to factory default settings Allows you to perform system reboot System Access System Time SNMP Device VLAN Spanning Tree Contains tabs that allow you to a Display user summary
21. AT amp T 800 998 2112 Guyana AT amp T 800 998 2112 Haiti AT amp T 800 998 2112 Honduras AT amp T 800 998 2112 Jamaica AT amp T 800 998 2112 Mexico Local Number 52 55 52 01 00 04 Mexico 01 800 849CARE Mexico 01 800 849 2273 Monserrat AT amp T 800 998 2112 Nicaragua AT amp T 800 998 2112 Panama AT amp T 800 998 2112 Paraguay AT amp T 800 998 2112 Peru AT amp T 800 998 2112 Related Standards The Baseline Switch 2226 Plus has been designed to the following standards Functional MAC Address Safety EMC Emis sions Immunity Environmental IEEE 802 3 Ethernet IEEE 802 3u Fast Ethernet IEEE 802 3ab and IEEE 802 3z Gigabit Ethernet IEEE 802 3x Flow Control IEEE 802 1D 1993 Bridging IEEE D802 1Q 1998 Virtual LAN 4096 UL CUL UL 60950 1 CSA 22 2 No 60950 1 TUV GS EN 60950 1 IEC 60950 1 CB EN50081 1 EN 55022 Class A EN50082 1 IEC 1000 4 2 3 4 6 EN60555 2 Class A EN 60555 3 FCC Part 15 Subpart B Class A EN 55024 Operating Tempera 0 45 C 32 113 F ture Storage Tempera ture Humidity Standard 40 70 C 40 158 F 0 9596 non condensing EN 60068 IEC 68 various parts TECHNICAL INFORMATION Physical Width Depth Height Weight Mounting Electrical Power Inlet AC Line Frequency Input Voltage Current Rating 44 cm 17 3 in 23 8 cm 9 4 in 4 4 cm 1 7 in or 1U 3 2 kg 7 05 Ib Free standing or 19 in rack mounted using
22. Com products This query based interactive tool is located at http knowledgebase 3com com and contains thousands of technical solutions written by 3Com support engineers Access Software Downloads Software Updates are the bug fix maintenance releases for the version of software initially purchased with the product In order to access these Software 78 APPENDIX A OBTAINING SUPPORT FOR YOUR PRODUCT Updates you must first register your product on the 3Com Web site at http eSupport 3com com First time users will need to apply for a user name and password A link to software downloads can be found at http eSupport 3com com or under the Product Support heading at www 3com com Software Upgrades are the feature releases that follow the software version included with your original product In order to access upgrades and related documentation you must first purchase a service contract from 3Com or your reseller Telephone Technical Support and Repair To obtain telephone support as part of your warranty and other service benefits you must first register your product at http eSupport 3com com Warranty and other service benefits start from the date of purchase so it is important to register your product quickly to ensure you get full use of the warranty and other service benefits available to you When you contact 3Com for assistance please have the following information ready m Product model name pa
23. ON Baseline Switch 3com 2226 Plus User Guide Installationsanleitung 3C16475CS www 3com com Part No 10015240 Rev AA Published August 2006 3Com Corporation 350 Campus Drive Marlborough MA USA 01752 3064 Copyright 2006 3Com Corporation All rights reserved No part of this documentation may be reproduced in any form or by any means or used to make any derivative work such as translation transformation or adaptation without written permission from 3Com Corporation 3Com Corporation reserves the right to revise this documentation and to make changes in content from time to time without obligation on the part of 3Com Corporation to provide notification of such revision or change 3Com Corporation provides this documentation without warranty term or condition of any kind either implied or expressed including but not limited to the implied warranties terms or conditions of merchantability satisfactory quality and fitness for a particular purpose 3Com may make improvements or changes in the product s and or the program s described in this documentation at any time If there is any software on removable media described in this documentation it is furnished under a license agreement included with the product as a separate document in the hard copy documentation or on the removable media in a directory file named LICENSE TXT or LICENSE TXT If you are unable to locate a copy please contact 3Com and a cop
24. STALLING THE SWITCH Alternatively the Switch can be rack mounted in a wiring closet or equipment room A mounting kit containing two mounting brackets and four screws is supplied with the Switch When deciding where to position the Switch ensure that m It is accessible and cables can be connected easily m Cabling is away from sources of electrical noise These include lift shafts microwave ovens and air conditioning units Electromagnetic fields can interfere with the signals on copper cabling and introduce errors therefore slowing down your network m Water or moisture cannot enter the case of the unit a Air flow around the unit and through the vents on the side of the case is not restricted 3Com recommends that you provide a minimum of 25 mm 1 in clearance m The air is as free from dust as possible m Temperature operating limits are not likely to be exceeded It is recommended that the unit is installed in a clean air conditioned environment It is always good practice to wear an anti static wrist strap when installing network equipment connected to a ground point If one is not available try to keep in contact with a grounded rack and avoid touching the unit s ports and connectors if possible Static discharge can cause reliability problems in your equipment Rack Mounting or Free Standing N The unit can be mounted in a 19 inch equipment rack using the mounting kit or it can be free standi
25. access the Web interface and configure the Switch Device Summary Information The Device Summary screen which automatically loads after you log on to the Web interface provides a snapshot of the Switch s basic settings and versions of current components Click Device Summary on the menu A screen appears with three tabs that include m Device View m Polling Interval 32 Device View CHAPTER 4 CONFIGURING THE SWITCH m Color Key Device View Contains fields that display the system switch and management switch information to identify the Switch The fields include Product Description System Location System Contact Serial Number Product 3C Number MAC Address Software Version Unit Uptime Bootroom Version and Hardware Version Figure 8 Device View casco Tama ATP RER If you request for technical assistance from 3Com Support you may be asked to print out the information on this screen Polling Interval Enter the interval in seconds you would like the Switch to refresh Range 10 to 180 seconds 0 to disable polling Figure 9 Polling Interval Polling Interval 7 Please enter a number between 10 and 180 seconds for polling interval or enter O to disable polling so Apply To set the polling interval 1 Click the Device Summary menu click Polling Interval tab 2 Enter a number between 10 to 180 seconds for the polling interval Enter a O to di
26. act your 3Com network supplier for assistance Using SFP Tranceivers The following sections describe how to insert an SFP transceiver into an SFP slot Using SFP Tranceivers 19 SFP transceivers are hot insertable and hot swappable You can remove them from and insert them into any SFP port without having to power down the Switch Approved SFP Transceivers The following list of approved SFP transceivers is correct at the time of publication m 3CSFP91 SFP SX m 3CSFP92 SFP LX To access the latest list of approved SFP transceivers for the Switch on the 3Com Web site enter this URL into your Internet browser http www 3com com gt 3Com recommends using 3Com SFPs on the Switch If you insert an SFP transceiver that is not supported the Switch will not recognize it Inserting an SFP Transceiver To be recognized as valid the SFP transceiver must have the following characteristics m 1000BASE SX or 1000BASE LX media type m 1000BASE SX SFP transceiver Use this transceiver to connect the Switch directly to a multimode fiber optic cable 20 gt INSTALLING THE SWITCH m 1000BASE LX SFP transceiver Use this transceiver to connect the Switch directly to a single mode fiber optic cable or to multi mode fiber using a conditioned launch cable If the SFP transceiver is faulty it will not operate within the Switch See Troubleshooting on page 73 To activate the SFP port Hold the transceiver s
27. aggregation group Select the aggregation group to modify then click Select Select the ports to add to the goup Click Apply Remove Use the Remove tab delete a link aggregation group Figure 43 Link Aggregation Remove Screen RER ie Remove Select Aggregationts to Remove Group ID Member Ports Remove Camal To remove a link aggregation group From the link aggregation group list select the aggregated group to remove Click Remove Spanning Tree per Port This administrative tool supports the configuration of the Switch to forward or block and discard 802 1D spanning tree BPDU packets Spanning tree is a bridge based system for providing fault tolerance on networks and can be used to detect and disable network loops The spanning tree ensures that the optimal path is maintained between spanning tree compliant networked devices by m Disabling redundant paths when the main paths are operational m Enabling redundant paths if the main paths fail Spanning tree uses a distributed algorithm to select a bridging device that serves as the root of the spanning tree network The bridging device known as the Root Bridge generates BPDUs Bridge Protocol Data Units on all ports at a regular interval known as the Hello Time All other spanning tree compliant devices on the network have a designated Root Port This is the Port nearest the Root Bridge and it is used for receiving the BPDUs initiated b
28. ally friendly and the inks are vegetable based with a low heavy metal content CONTENTS ABOUT THIS GUIDE Conventions 7 Documentation Comments 8 Product Registration 8 1 INTRODUCING THE BASELINE SWITCH Overview of the Baseline Switch 9 Features and Capabilities 9 Autosensing of MDI MDIX Connections Autonegotiating 10 100 Mbps Ports Gigabit Combo Ports RJ 45 SFP 9 Physical Features 10 Front Panel 10 Rear Panel 13 Package Contents 14 9 2 INSTALLING THE SWITCH Before You Begin 15 Positioning the Switch 15 Rack Mounting or Free Standing 16 Using the Mounting Kit 16 Montagesatz Anweisungen 17 Placing Units On Top of Each Other Supplying Power to the Switch 18 17 Checking for Correct Operation 18 Using SFP Tranceivers 19 Approved SFP Transceivers 19 Inserting an SFP Transceiver 19 Removing an SFP Transceiver 20 Performing Spot Checks 21 CONNECTING TO THE WEB INTERFACE Requirements for Accessing the Web Interface 23 Running the Discovery Application 23 Logging On to the Web Interface 25 Navigating the Web Interface 26 Menu 26 Buttons 29 Port Status 29 Accessing the Interface Without Using Discovery 30 DHCP Assigned IP Address 30 Manually Assigned Static IP Address 30 CONFIGURING THE SWITCH Configuration Overview 31 Device Summary Information 31 Administration Settings 33 Modifying the IP Address Settings 33 Automatic IP Configuration 33 IP Setup 34 Backup Configuration 35 Res
29. ame none SelectAll Remove 1 Enter a set of VLANs or select all VLANs to add to the remove list then click Select 2 From the list of selected VLANs choose a VLAN to remove or click the Se ect A button to select all the VLANs Click Remove to remove the VLAN Port Detail Choose a port to display the tagged and untagged VLAN memberships it is associated with Figure 29 Port Detail Screen Setup Modtty VLAN Mosity Rename Remove Por Detail Untagged member of VLAN S Tagged member of VLAN S 1 a a a 1 VLAN Detail Use this screen to display detailed VLAN information 1 Enter a set of VLANS or select all VLANS to add to the details list then click Select 2 From drop down menu choose VLAN to display the tagged and untagged VLAN memberships it is associated with the ports on the switch Figure 30 VLAN Detail Screen a Mo Pat ee eee 70 2 cf 1250 6 AB VANS Seit zl a Forwarding Tagged Untagged Frames Each port on the Switch is capable of passing tagged or untagged frames The following describes how the Switch will handle tagged and untagged frames m When a port receives a tagged frame with a VLAN ID and the port is a member untagged or tagged of that VLAN the frame is accepted Otherwise the if the port Configuring VLANs 47 is not a member of that VLAN the frame is discarded m When a port receives an untagged frame and
30. ample 3 5 10 ID Name 1 De aultVlan Available option on the Setup screen include m VLAN ID ID of configured VLAN 1 4094 no leading zeroes For examples on setting up VLANs refer to Sample VLAN Configurations CAUTION At least one port must always be an untagged member of VLAN 1 the management VLAN If you choose to connect all ports to VLANs other than VLAN 1 you will no longer be able to access the Web interface If this happens you will need to reset the Switch to factory settings 44 CHAPTER 4 CONFIGURING THE SWITCH By default all ports belong to VLAN 1 as an untagged member However they can belong to multiple VLANs as a tagged member Also newly created VLANs will initially have no ports associated with them Modify VLAN Use the Modify VLAN screen to change the VLAN to which a port belongs and configure the port to communicate with all other VLANs or a selected VLAN Figure 25 Modify VLAN Screen SE enc MT Example 13510 Select Select VLAN to modify MAN EE 5235550 955 oe ba mutsple ports before applying nthe group membership types on a Link aggregabon please select all the ports Tagged Member s d E Enter a set of VLANs or select all VLANs to configure then click Select From the drop down menu select a VLAN to modify Select a membership use Available options for each port include only one option can be associ
31. arranty and other service benefits available to you Warranty and other service benefits are enabled through product registration Register your product at http eSupport 3com com 3Com eSupport services are based on accounts that you create or have authorization to access First time users must apply for a user name and password that provides access to a number of eSupport features including Product Registration Repair Services and Service Request If you have trouble registering your product please contact 3Com Global Services for assistance are available to manage your installation with minimal disruption to your network Expert assessment and implementation services are offered to fill resource gaps and ensure the success of your networking projects More information on 3Com maintenance and Professional Services is available at www 3com com Contact your authorized 3Com reseller or 3Com for a complete list of the value added services available in your area Purchase Value Added Services To enhance response times or extend warranty benefits contact 3Com or your authorized 3Com reseller Value added services like 3Com Express and Guardian M can include 24x7 telephone technical support software upgrades onsite assistance or advance hardware replacement Experienced engineers Troubleshoot Online You will find support tools posted on the 3Com Web site at www 3com com 3Com Knowledgebase helps you troubleshoot 3
32. ated with a single port m Tagged m Untagged Select ports to associate with the membership then click Apply Modify Port Use the Modify Port screen to modify the VLAN membership of a port Figure 26 Modify Port Screen Untapped Tagged Not A Member Select membership type Not available for selection Select the VLANs to apply this change to Example 1 3 5 10 C AI VLANS 5E Cancel 1 Select a membership use Available options for each port include only one option can be associated with a single port m Nota member m Tagged m Untagged 2 Select a port to associate with the membership 3 Enter a VLAN to apply these changes to then click Apply Configuring VLANs 45 Rename Use the Rename screen to change the name of a VLAN Figure 27 Rename Screen Select a set of VLANs to work with Example 135 10 G Al MANS Swa Choose a VLAN to rename D Name none Selected ID Enter new name Aen 1 Enter a set of VLANs or select all VLANs to add to the rename list then click Se ect 2 From the list of selected VLANs choose a VLAN to rename Enter a new VLAN name and click Apply 46 CHAPTER 4 CONFIGURING THE SWITCH Remove Use the Remove screen to remove a VLAN Figure 28 Remove Screen Setup Modify WLAN Modify Port Rename Remove Port Detail VLAN Detail Select a set of VLANs to work with c Example 135 10 G AJ VLANs Seed 1D N
33. cally for managing devices on a network Equipment commonly managed with SNMP includes switches routers and host computers SNMP is typically used to configure these devices for proper operation in a network environment as well as to monitor them to evaluate performance or detect potential problems Click Administration then SNMP on the menu A screen appears with four tabs m Summary m Setup m SNMP Add m SNMP Remove Summary Displays the list community access strings Figure 20 SNMP Summary Screen Summary SNMP Add SNMP Remove SNMP Trap Summary IP Address Community String Version money Setup Enable or disable the SNMP Agent Status Figure 21 SNMP Setup Screen Setup SNMP Add SNMP Remove SNMP Agent Status Enabled Apply Cancel Administration Settings 41 SNMP Add This page allows you to create community strings for management access Figure 22 SNMP Add Screen Summary Setup SNMP Add SNMP Remove _ New Traps Destination IP Address Community String Private z Version 1 Apply Cancel IP Address Community String Version none 42 CHAPTER 4 CONFIGURING THE SWITCH SNMP Remove This page allows you to remove community strings 23 SNMP Remove Screen A ino U Community String Version IP Address Select All Remove Cancel Configuring VLANs A virtual LAN VLAN is a collection of network nodes that share the same collisio
34. ck on while keeping the Recovery button pressed Release the Recovery button Reset the Switch either by m Accessing the Web interface using Discov ery and then pressing the RESET button on the Initialize tab of the Administration menu After you click RESET a confirmation message appears Click OK to confirm m Powering off the Switch and then powering it back on CHAPTER 5 TROUBLESHOOTING The Switch will perform automatic IP configu ration after you reset it See Automatic IP Configuration on page 33 for more informa tion For information on using the Discovery application refer to Running the Discovery Application on page 23 Forgotten Password If you forget the password to the Web interface after you set it you will need to reset the Switch to regain access See Resetting to Fac tory Defaults on page 73 for instructions After resetting the Switch log on to the Web interface using the default admin account set tings m User name admin m Password blank no password Forgotten Static IP Address If you forget the static IP address that you assigned to the Switch and you need to access the Web interface use the Discovery applica tion to automatically detect the IP address and connect to the interface Solving LED Issues This section lists some issues that are related to the LEDs on the front panel of the Switch For information on basic LED checks ref
35. cks do not identify the cause of the problem it may be that the unit or the device connected to the port is faulty Contact your supplier for further advice 4 Duplex Status LEDs The second and fourth bottom row of Status LEDs which are colored yellow for duplex or green for module active show the duplex status of the related ports 10 100 1000BASE T Ports Status Meaning Yellow The port is operating in full duplex mode Off The port is operating in half duplex mode 1000BASE T only operates in full duplex mode 10 100BASE TX can be in half or full duplex mode Gigabit Combo Ports Status Meaning Green SFP is inserted in the slot Off No SFP in the slot 5 Power LED The Power LED shows the power status of the Switch Status Meaning Green The unit is powered on and ready for use Yellow Internal power POST or loopback test has failed Switch is in fail safe mode Off The unit is not receiving power m Check that the power cord is connected cor rectly m If the unit still does not operate contact your supplier 6 Self adhesive Pads The unit is supplied with four self adhesive rubber pads Do not apply the pads if you intend to rack mount the unit If the unit is to be part of a free standing stack apply the pads to each marked corner area on the underside of the unit Place the unit on top of the lower unit ensuring that the pads locate with the recesses of the low
36. completed the Switch will restart Although the upgrade process has been designed to preserve your configuration settings 3Com recommends that you make a backup of the configuration beforehand in AN case the upgrade process fails for any reason for example the connection between the computer and the Switch is lost while the new firmware is being copied to the Switch A progress screen displays while the upgrade is taking place The upgrade procedure can take a few minutes and is complete when the progress bar has finished running and the Power LED has stopped flashing and is permanently green CAUTION Do not interrupt power to the Switch during the upgrade procedure If you do the firmware may be corrupted and the Switch may not start up properly afterwards Initialize 1 To reset the Switch to factory default settings Click Administration then Initialize on the menu Administration Settings 37 You will lose all your configuration changes The Switch LAN IP address will revert to the default IP address 169 254 x y see Automatic IP Configuration on page 33 You may need to restart your computer to re establish communication with the Switch Reboot Clicking on Administration then Reboot on the menu has the same effect as power cycling the unit No configuration information will be lost Reboot the Switch if you are experiencing problems and you want to re establish your Internet connection
37. cs are used to Emphasize a point m Denote a new term at the place where it is defined in the text m Identify menu names menu commands and software button names Examples From the Help menu select Contents Click OK Please include the following information when contacting us m Document title m Document part number on the title page m Page number if appropriate Example m Baseline Switch 2226 Plus User Guide m Part number 10015240 m Page 25 Please note that we can only respond to comments and questions about 3Com product documentation at this e mail address Questions related to technical support or sales should be directed in the first instance to your network supplier Documentation Comments Your suggestions are very important to us They will help make our documentation more useful to you Please e mail comments about this document to 3Com at pddtechpubs comments 3com com Product Registration You can now register your Baseline Switch on the 3Com Web site to receive up to date information on your product http esupport 3com com 1 INTRODUCING THE BASELINE SWITCH This chapter provides an overview of the features and capabilities of the 3Com Baseline Switch 2226 Plus It also identifies the contents of the Switch package and helps you get to know the physical features of the device Overview of the Baseline Switch The 3Com Baseline Switch 2226 Plus is a versatil
38. de l unit un r seau t l phonique central priv ou public Raccorder seulement connecteurs de donn es RJ 45 syst mes de r seaux de t l phonie ou t l phones de r seaux ces prises I est possible de raccorder des c bles prot g s ou non prot g s avec des jacks prot g s ou non prot g s ces prises de donn es WARNHINWEIS RJ 45 Porte Diese Porte sind gesch tzte Datensteckdosen Sie d rfen weder wie normale traditionelle Telefonsteckdosen noch f r die Verbindung der Einheit mit einem traditionellem privatem oder ffentlichem Telefonnetzwerk gebraucht werden Nur RJ 45 DatenanscluBe Telefonnetzsysteme or Netztelefone an diese Steckdosen anschlieBen Entweder gesch tzte oder ungesch tzte Buchsen d rfen an diese Datensteckdosen angeschlossen werden The Switch has 24 10 100 Mbps auto negotiating ports Each port supports automatic MDI MDI X detection and can be connected to either a 10BASE T or 100BASE TX device For each port the speed and duplex mode half duplex or full duplex for 10BASE T and 100BASE TX are automatically determined by the capabilities of the connected device CAUTION The Switch supports full duplex auto negotiation If auto negotiation is disabled for 1000BASE T then the Switch uses the forced mode default of 100 full duplex mode If the connected device does not support auto negotiation the Switch will operate in half duplex mode even if the attached device is operating in
39. e easy to use unmanaged switch It is ideal for users who want the high speed performance of 10 100 switching with the added functionality of Gigabit fiber links but do not need sophisticated management capabilities The Switch is shipped ready for use No configuration is necessary Features and Capabilities The Switch has 24 shielded RJ 45 10 100 Mbps auto negotiating ports and 2 Gigabit combo ports which comprised of a RJ 45 port and a Small Form Factor Pluggable SFP transceiver slot on the front panel for easy flexible connection to fiber based Gigabit media Autosensing of MDI MDIX Connections All ports on the Switch can autosense both medium dependent interface MDI and medium dependent interface crossover MDIX connections This allows you to connect network devices to each port using either a normal straight through TP twisted pair cable or a crossover TP cable Any port can therefore be used to connect to another switch port server or workstation without additional configuration Autonegotiating 10 100 Mbps Ports Each 10 100 Mbps port automatically determines the speed and duplex mode of the connected equipment and provides a suitable switched connection The 10 100 Mbps ports can operate in either half duplex or full duplex mode Gigabit Combo Ports RJ 45 SFP The 2 Gigabit combo ports support fiber Gigabit Ethernet short wave SX and long wave LX SFP transceivers in any combination This o
40. e 00 DO 1E 00 00 00 Pingtel phone 00 01 E3 00 00 00 Siemens AG phone OUI Modify Use the OUI Modify tab to add to the list of Organizational Unique Identifier The following options are available m Telephony OUI Input a new company identifier to add to the list m Description Input a description for the new company identifier To add to the OUI list 1 Enter a Telephony OUI and description 2 Click Aad To remove an OUI from the list 1 Select a Telephony OUI from the list 2 Click Remove Security 65 Figure 54 QoS OUI Modify Screen VETEMENT MEME Specify a telephony OUI and click the Add button to add a telephone to the list Telephony OUI DOOR Descnption Aad Remove Telephony OVIs Le ll Security Using the Web interface you can configure the RADIUS Client and 802 1X settings The Security menu includes two items m RADIUS Client m 802 1X Settings RADIUS Client Remote Authentication Dial in User Service RADIUS is a logon authentication protocol that uses software running on a central server 66 CHAPTER 4 CONFIGURING THE SWITCH to control access to RADIUS aware devices on the network An authentication server contains a database of multiple user name password pairs with associated privilege levels for each user or group that require management access to a switch The RADIUS Client menu includes two tabs m Detail m Configure Detail
41. e Switch This sticker contains the MAC address and default IP address of the Switch DHCP Assigned IP Address If you set the IP address mode to DHCP check the DHCP server for the IP address that is assigned to the Switch and then use that IP address to access the Web interface For example if the DHCP server assigned the IP address 192 168 0 123 to the Switch start your Web browser and then type http 192 168 0 123 Manually Assigned Static IP Address If you assigned a static IP address to the Switch you need to use that IP address to access the Web interface the next time you want to configure the Switch For example if you assigned the Switch the IP address 192 168 0 123 start your Web browser and then type nttp 192 168 0 123 4 This chapter provides information on how to configure the Switch s advanced features Topics include m Device Summary Information m Administration Settings m Configuring VLANs m Configuring Port Settings m QoS VoIP Traffic Settings m Security m Monitoring CONFIGURING THE SWITCH You only need to access the Web interface if you want to m Setthe administration password to the Web interface m Assign an IP address to the Switch m Configure the Switch s advanced features m Upgrade the firmware Configuration Overview The Switch is shipped ready for use If you only want the Switch to function as a basic layer 2 switch you do not need to
42. e of five grades of Twisted Pair TP cabling defined by the EIA TIA 568 standard Category 5e can be used in Ethernet 10BASE T Fast Ethernet 100BASE TX and Gigabit Ethernet 1000BASE T networks and can transmit data at speeds of up to 1000 Mbps Category 6 Cables One of five grades of Twisted Pair TP cabling defined by the EIA TIA 568 B standard Category 6 can be used in Ethernet 10BASE T Fast Ethernet 100BASE TX and Gigabit Ethernet 1000BASE T networks and can transmit data at speeds of up to 1000 Mbps Client The term used to describe the desktop PC that is connected to your network DHCP Dynamic Host Configuration Protocol This protocol automatically assigns an IP address for every computer on your network Windows 95 Windows 98 and Windows NT 4 0 contain software that assigns IP addresses to workstations on a network These assignments are made by the DHCP server software that runs on Windows NT Server Ethernet A LAN specification developed jointly by Xerox Intel and Digital Equipment Corporation Ethernet networks use CSMA CD to transmit packets at a rate of 10 Mbps and 100 Mbps over a variety of cables Ethernet Address See MAC address Fast Ethernet An Ethernet system that is designed to operate at 100 Mbps Gigabit Ethernet An Ethernet system that is designed to operate at 1000 Mbps Full Duplex A system that allows packets to be transmitted and received at the same time and in
43. ee tabs m Summary m Detail m Setup Summary Use the Summary tab to display the 802 1X authentication settings 68 CHAPTER 4 CONFIGURING THE SWITCH Figure 57 802 1X Summary Screen 5 102 1x System Authentication Control Disabled Soloct Feature Oper tion Mode Max Count Mode Reauthentication Max Request C Quiet Period Reauthentication Period Transmit Pernod C Authorized Supplicant Feature Summary Pons Setting 1 Singie iiost Single Wost Single Host Singie Host Singie Host Singie ioat Single Nost Single Host Detail Use the Detail tab to display detailed 802 1X authentication information for a port Figure 58 802 1X Detail Screen EEEEEENENENN Select Port 6000000000 CMM MANA RATE ir Bode Force Autborized Deauthentication Disabled Request 2 Quiet Period 60 Reauzh Period 3600 Transmit Period 20 min ie ne Te Value in brackets is true value for pod Setup Use the Setup tab to configure the 802 1X authenticaion settings The following fields are available m System Authentication Sets the global setting for 802 1X Default Disabled m Operation Mode Allows single or multiple hosts clients to connect to an 802 1X authorized port Options Single Host Multi Host Default Single Host m Mode Sets the authentication mode to one of the f
44. effect doubles the potential throughput of a link Half Duplex IEEE A system that allows packets to be transmitted and received but not at the same time Half duplex is not supported for 1000 Mbps Contrast with full duplex Institute of Electrical and Electronics Engineers This American organization was founded in 1963 and sets standards for computers and communications IEEE 802 1D Specifies a general method for the operation of MAC bridges including the Spanning Tree Protocol IEEE 802 1Q VLAN Tagging Defines Ethernet frame tags which carry VLAN information It allows switches to assign endstations to different virtual LANs and defines a standard way for VLANs to communicate across switched networks IEEE 802 3ad A standard that defines link aggregation 802 3ad is now incorporated into the relevant sections of the IEEE Std 802 3 2002 IETF 87 Internet Engineering Task Force An organization responsible for providing engineering solutions for TCP IP networks In the network management area this group is responsible for the development of the SNMP protocol Internet Protocol IP is a layer 3 network protocol that is the standard for sending data through a network IP is part of the TCP IP set of protocols that describe the routing of packets to addressed devices An IP address consists of 32 bits divided into two or three fields a network number and a host number or a network number a subnet numbe
45. egular checks can give you an early warning of a possible failure any problems can then be attended to when there will be least effect on users 3Com recommends periodically checking the items listed in Table 1 Table 1 Items to Check Cabling Check that all external cabling connections are secure and that no cables are pulled taut Cooling fan Where possible check that the cooling fan is operating by listening to the unit The fan is fitted near to the front right hand side of the unit when viewed from the front If you experience any problems operating the Switch refer to Troubleshooting on page 73 22 INSTALLING THE SWITCH 3 CONNECTING TO THE WEB INTERFACE The Switch has a built in Web interface that m Accessing the Interface Without Using you can use to set the admin password change Discovery the IP address that is assigned to the Switch and configure its advanced settings Requirements for Accessing the Web If you only want the Switch to function as a Interface i gt basic layer 2 switch you do not need to access the Web interface and configure the Switch To connect to the Web interface you need the following This chapter provides information on how the m The Discovery application which is included gain access to the Web interface using the Dis on 3Com Baseline Switch 2226 Plus covery application It also introduces the menu CD ROM that is supplied with your Switch items and buttons that
46. embers of VLAN2 can now communicate with those ports on Switch 2 that are members of VLAN2 Spanning Tree Spanning tree is a bridge based system for providing fault tolerance on networks and can be used to detect and disable network loops The spanning tree ensures that the optimal 50 CHAPTER 4 CONFIGURING THE SWITCH path is maintained between spanning tree compliant networked devices by m Disabling redundant paths when the main paths are operational m Enabling redundant paths if the main paths fail Spanning tree uses a distributed algorithm to select a bridging device that serves as the root of the spanning tree network The bridging device known as the Root Bridge generates bridge protocol data units BPDUs on all ports at a regular interval known as the Hello Time All other spanning tree compliant devices on the network have a designated Root Port This is the Port nearest the Root Bridge and it is used for receiving the BPDUs initiated by the Root Bridge If a bridge does not get a Hello BPDU after a predetermined interval the bridge assumes that the link to the Root Bridge is down This bridge will then initiate negotiations with other bridges to reconfigure the network to reestablish a valid network topology After all the bridges on the network have determined the configuration of their ports each bridge only forwards traffic between the Root Port and the ports that are the Designated Bridge Ports
47. er to the following topics in Chapter 1 m 2 Gigabit Combo Ports RJ 45 SFP m 3 Link Activity Status LEDs m 5 Power LED A link is connected but the Link Activity LED for the port is off There is a problem with this connection Verify that m The device being connected to is powered on and operating correctly m The cable is connected at both ends m The cable is not damaged m f the connection is to a workstation that the workstation s network interface is installed and configured correctly m The correct category of cable is being used for the required link speed Category 3 cables can be used for 10BASE T operation only Category 5 cable is required for 100BASE TX or 1000BASE T 3Com recom mends Category 5e or 6 cables for 1000BASE T operation A fiber cable is connected but the Module Active LED is off Verify that m The fiber cable is in good condition m The SFP module is correctly inserted m 3Com SFP module is being used Refer to Approved SFP Transceivers on page 19 for details m The equipment at the far end is installed and correctly configured Solving LED Issues 75 The Link Activity LED is on but network performance is poor The Switch supports full duplex autonegotia tion If the connected device does not support autonegotiation ensure that it is configured for half duplex operation only If the connected device has autonegotiation disabled or overrid den and
48. er unit Physical Features 13 Rear Panel The rear panel of the Switch contains a power supply Socket and a recovery button 7 Power Supply The Switch automatically adjusts to the supply voltage Only use the power cord that is supplied with the unit 8 Recovery Button The recovery button reinitializes the Switch This returns the Switch to the factory default settings if for example you have forgotten the default IP address or forgotten your user name or password AN CAUTION 3Com recommends that you back up your configuration settings before you recover the Switch otherwise your configuration may be lost Refer to Resetting to Factory Defaults on page 73 for details 14 INTRODUCING THE BASELINE SWITCH Package Contents Before installing and using the Switch verify that your Switch package is complete The Switch comes with m One power cord m Four standard height self adhesive rubber pads m One mounting kit m Installation CD m This User Guide a Warranty flyer The Switch is powered from the AC supply If any of the above items are damaged or missing contact your 3Com network supplier immediately 2 INSTALLING THE SWITCH This chapter contains information that you need to install and set up the Switch It covers the following topics m Before You Begin m Positioning the Switch m Rack Mounting or Free Standing wm Supplying Power to the Switch m Using SFP Transceivers m Perform
49. f Figure 37 Port Administration Summary Screen each port or shut down or disable ports Summary CDN The Port menu includes five items mn nn Tu gt C Flow Contro C Link Type Administration Po ra rid m Link Aggregation Feature Summary m Spanning Tree per Port Ports Setting m Port Mirroring z m Statistics Enabled Administration Three tabs are available on the Port Administration page i aai m Summary m Detail m Setup 54 CHAPTER 4 CONFIGURING THE SWITCH Detail Use the Detail tab to display detailed port setting information for a port Figure 38 Port Administration Detail Screen o UE Select port Values in brackets indicate the coment operating value fr the chosen port Setup Use the Setup tab to configure the port settings The following options are available m Port State Enables and disables the port m Flow Control Enables and disables flow control on the port When flow control is enabled for the port the Switch regulates the packet flow so that a sending device does not transmit more packets than a receiving device can process If flow control is disabled packets may be dropped under certain periods of high traffic Flow control is disabled by default Speed Sets the speed mode of the port Available options include auto 10 100 and 1000 For 1000 Mbps connections see Speed Duplex for 1000 Mbps Co
50. ffers you the flexibility of using SFP transceivers to provide connectivity between the Switch and a 1000 Mbps core network 10 INTRODUCING THE BASELINE SWITCH When an SFP port is in operation the corresponding 1000BASE T port is disabled The 1000 Mbps connections can only operate in full duplex mode Physical Features Figure 1 shows the front and rear panels of the Switch The numbers in this diagram refer to numbered sections in Front Panel on page 10 and Rear Panel on page 13 Figure 1 Front and Rear Panels Front Panel AN The front panel of the Switch contains a series of indicator lights LEDs that help describe the state of various networking and connection operations 1 RJ 45 10 100 Ports WARNING RJ 45 Ports These are shielded RJ 45 data sockets They cannot be used as standard traditional telephone sockets or to connect the unit to a traditional PBX or public telephone network Only connect RJ 45 data connectors network telephony systems or network telephones to these sockets Either shielded or unshielded data cables with shielded or unshielded jacks can be connected to these data sockets AVERTISSEMENT Points d acc s RJ 45 Ceux ci sont prot g s par des prises de donn es Ils ne peuvent pas tre utilis s comme prises de t l phone conventionnelles standard ni pour la connection
51. full duplex 100BASE TX full duplex 100BASE TX half duplex 10BASE T full duplex and 1OBASE T half duplex Auto negotiation is defined in the IEEE 802 3 standard for Ethernet and is an operation that takes place in a few milliseconds Auto negotiation must be enabled for the 1000BASE T ports to operate at 1000 Mbps full duplex Bandwidth The information capacity measured in bits per second that a channel can transmit The bandwidth of Ethernet is 10 Mbps the bandwidth of Fast Ethernet is 100 Mbps and Gigabit Ethernet is 1000 Mbps BPDU Bridge Protocol Data Unit A type of information packet that ensures that data is efficiently exchanged between Switches in a LAN BPDU messages detect loops in a network and remove them by shutting down the bridge causing the loop 86 GLOSSARY Category 3 Cables One of five grades of Twisted Pair TP cabling defined by the EIA TIA 568 standard Category 3 is voice grade cable and can only be used in Ethernet networks 10BASE T to transmit data at speeds of up to 10 Mbps Category 5 Cables One of five grades of Twisted Pair TP cabling defined by the EIA TIA 568 standard Category 5 can be used in Ethernet 10BASE T and Fast Ethernet networks 100BASE TX and can transmit data at speeds of up to 100 Mbps Category 5 cabling is better to use for network cabling than Category 3 because it supports both Ethernet 10 Mbps and Fast Ethernet 100 Mbps speeds Category 5e Cables On
52. gs for each port The following options are available m Status Enables and disables spanning tree for the port m Edged Port Enables and disables edged port for the port m Link Type Choose between Point to Point Shared or Auto for the link type Path Cost The path cost is used to determine the best path between devices The path cost method is used to determine the range of values that can be assigned to each interface m Port Priority Used in selecting the root device root port and designated port The device with the highest priority becomes the STA root device However if all devices have the same priority the device with the lowest MAC address will then become the root device If you modify any of these settings click Apply to save your changes Figure 46 Spanning Tree Setup Screen 2662 Chenge Link Chango Path Con ed Port No Change Post Peonty Aoo Cancel Port Mirroring The Switch allows you to monitor traffic going in and out of a particular port For traffic monitoring to work you need to attach a network analyzer to one port and use it to monitor the traffic of other ports in the stack To set up traffic monitoring you need to set an analysis port the port that is connected to the analyzer and a monitor port the port that is to be monitored Once the pair is defined and you enable traffic monitoring the Switch
53. hysical location or connection point in the network A VLAN serves as a logical workgroup with no physical barriers and allows users to share information and resources as though located on the same LAN REGULATORY NOTICES FCC Statement This equipment has been tested and found to comply with the limits for a Class A digital device pursuant to Part 15 of the FCC Rules These limits are designed to provide reasonable protection against harmful interference in a commerical environment This equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with the instructions may cause harmful interference to radio communications Operation of this equipment in a residential area is likely to cause harmful interference to radio communications in which case the user will be required to correct the inter erence at their own expense Information to the User If this equipmen does cause 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 m Reorient the receiving antenna m Reloca m Move a e the equipment with respect to the receiver he equipment away from the receiver Plug the equipment into a different outlet so that equipment and receiver are on different branch circuits If necessary the user should consu
54. ing Spot Checks Before You Begin AN AN WARNING Safety Information Before installing or removing any components from the Switch or carrying out any maintenance procedures read the safety information provided in Appendix C of this guide AVERTISSEMENT Consignes de Securite Avant d installer ou d enlever tout composant du Switch ou d entamer une proc dure de maintenance lisez les informations relatives la s curit qui se trouvent dans l Appendice C Appendix C de ce guide AN WARNHINWEIS Sicherheitsinformationen Bevor Sie Komponenten aus dem Switch entfernen oder dem Switch hinzufuegen oder Instandhaltungsarbeiten verrichten lesen Sie die Sicherheitsanweisungen die in Anhang C Appendix C in diesem Handbuch aufgefuehrt sind ADVERTENCIA Informaci n de Seguridad Antes de instalar o extraer cualquier componente del product o de realizar tareas de mantenimiento debe leer la informaci n de seguridad facilitada en el Ap ndice C Appendix C de esta gu a del usuario AVVERTENZA Informazioni di Sicurezza Prima di installare o rimuovere qualsiasi componente dal product di eseguire qualsiasi procedura di manutenzione leggere le informazioni di sicurezza riportate nell Appendice C Appendix C della presente guida per l utente Positioning the Switch The Switch is suitable for use in an office environment where it can be free standing or mounted in a standard 19 inch equipment rack 16 IN
55. is configured as full duplex the Switch will configure the link as half duplex causing a mismatch that will reduce network performance when data is transmitting and receiving simultaneously on the same link Ensure that the connected device has either m Autonegotiation enabled or m The ports are configured for half duplex operation 76 CHAPTER 5 TROUBLESHOOTING All ports appear to show continual activity There may be broadcast storms on the net work Remove port connections one at a time waiting a few seconds between each port If the LEDs go off after removing a port connec tion the device that was connected to that port is introducing an excessive amount of broadcast frames to the network Some pieces of network equipment operate by sending out broadcast frames regularly Refer to the documentation that accompanies the device for information on disabling the broadcast operation If the Problem Persists If the problem persists and the unit still does not operate successfully contact your 3Com network supplier with the following informa tion before returning the unit m Product number and serial number printed on a label supplied with the unit m A brief description of the issue A X OBTAINING SUPPORT FOR YOUR PRODUCT Register Your Product Warranty and other service benefits start from the date of purchase so it is important to register your product quickly to ensure you get full use of the w
56. istered trademark in the United States and other countries licensed exclusively through X Open Company Ltd All other company and product names may be trademarks of the respective companies with which they are associated ENVIRONMENTAL STATEMENT It is the policy of 3Com Corporation to be environmentally friendly in all operations To uphold our policy we are committed to m Establishing environmental performance standards that comply with national legislation and regulations m Conserving energy materials and natural resources in all operations m Reducing the waste generated by all operations Ensuring that all waste conforms to recognized environmental standards Maximizing the recyclable and reusable content of all products m Ensuring that all products can be recycled reused and disposed of safely m Ensuring that all products are labelled according to recognized environmental standards m Improving our environmental record on a continual basis End of Life Statement 3Com processes allow for the recovery reclamation and safe disposal of all end of life electronic components Regulated Materials Statement 3Com products do not contain any hazardous or ozone depleting material Environmental Statement about the Documentation The documentation for this product is printed on paper that comes from sustainable managed forests it is fully biodegradable and recyclable and is completely chlorine free The varnish is environment
57. l Number 54 11 5556 3200 St Lucia AT amp T 800 998 2112 Argentina 0 810 444 3COM St Vincent AT amp T 800 998 2112 Argentina 810 44 32 66 Suriname AT amp T 800 998 2112 Aruba AT amp T 800 998 2112 Trinidad and Tobago AT amp T 800 998 2112 Bahamas AT amp T 800 998 2112 Turks and Caycos AT amp T 800 998 2112 Barbados AT amp T 800 998 2112 Uruguay Montevideo AT amp T 800 998 2112 Belize AT amp T 800 998 2112 Venezuela AT amp T 800 998 2112 Bermuda AT amp T 800 998 2112 Virgin Islands AT amp T 800 998 2112 Bolivia AT amp T 800 998 2112 Brazil Local Number 55 11 5643 2700 You can also obtain support in this region using the following Brazil 800 133 266 a ae Spanish speakers enter the URL British Virgin Islands AT amp T 800 998 2112 Cayman Islands AT amp T 800 998 2112 http lat 3com com lat support form html Chile AT amp T 800 998 2112 Portuguese speakers enter the URL Columbia Local Number 57 1592 5000 http lat 3com com br support form html Colombia 800 011 3266 English speakers in Latin America should send e mail to Costa Rica AT amp T 800 998 2112 lat support anc 3com com Curacao AT amp T 800 998 2112 B Dominica AT amp T 800 998 2112 Dominique AT amp T 800 998 2112 US and Canada Telephone Technical Support and Repair Equador AT amp T 800 998 2112 El Salvador AT amp T 800 998 2112 1 800 876 3266 French Guiana AT amp T 800 998 2112 Grenada AT amp T 800 998 2112 Guadalupe AT amp T 800 998 2112 Guatemala
58. l not communicate with any other ports unless you add other ports to the VLAN or change the port configuration Setting Up VLAN Across Two Switches This example explains how you can set up a VLAN across two Switches using Tagged ports This enables ports that are members of the same VLAN but are on different switches to communicate provided that a port on each Switch is set to Tagged and that these ports are connected Figure 32 Tagged VLAN Configuration Endstation in VLAN 1 Untagged a Server in VLAN 1 Untagged Endstation in VLAN 2 Untagged Switch 1 Port 16 in VLANs 1 and 2 Tagged Switch 2 Port 8 in VLANs 1 and 2 Tagged Bem annor Erdetilion Do in VLAN 2 Server in VLAN 2 Untagged Untagged Endstation in VLAN 1 Untagged To set up the configuration shown in Figure 32 do the following Create VLAN2 on both Switch 1 and Switch 2 You need not create VLAN1 since it exists by default Configuring VLANs 49 2 On Switch 1 set the ports that you want to be part of VLAN2 to Untagged Set one port for example port 16 to Tagged Click Apply On Switch 2 set the ports that you want to be part of VLAN2 to Untagged Set one port for example port 8 to Tagged Click Apply Connect the Tagged port on Switch 1 in this example port 16 to the Tagged port on Switch 2 in this example port 8 Those ports on Switch 1 that are m
59. lf adhesive rubber pads supplied Apply the pads to the underside of each Switch sticking one in the marked area at each corner Place the Switch units on top of each other ensuring that the pads of the upper unit line up with the recesses of the lower unit Supplying Power to the Switch pw Power problems can be the cause of serious failures and downtime in your network Ensure that the power input to your system is clean and free from sags and surges to avoid unforeseen network outages 3Com recommends that you install power conditioning especially in areas prone to blackout power dips and electrical storms The unit is intended to be grounded Ensure it is connected to earth ground during normal use Installing proper grounding helps to avoid damage from lightning and power surges Before powering on the Switch verify that the network cables and the power cable are securely connected CAUTION The Switch has no ON OFF switch The only way to power on and power off the Switch is by connecting and disconnecting the power cord This is called power cycling To power on the Switch 1 Plug the power cord into the power socket on the rear panel of the Switch Refer to 7 Power Supply on page 13 for more information 2 Plug the other end of the power cord into a power outlet When the Switch is powered on the Power LED lights up If the Power LED does not light up refer to 5 Power LED on page 13 for more i
60. lt the dealer or an experienced radio television technician for additional suggestions The user may find the following booklet prepared by the Federal Communications Commission helpful How to Identify and Resolve Radio TV Interference Problems This booklet is available from the U S Government Printing Office Washington DC 20402 Stock No 004 000 00345 4 In order to meet FCC emissions limits this equipment must be used only with cables which comply with IEEE 802 3 91 CE Statement Europe This product complies with the European Low Voltage Directive 73 23 EEC and EMC Directive 89 336 EEC as amended by European Directive 93 68 EEC CSA Statement This Class A digital apparatus meets all requirements of the Canadian Interference Causing Equipment Regulations Cet appareil num rique de la classe A respecte toutes les exigences du R glement sur le mat riel brouilleur du Canada 92 INDEX Numbers 1000BASE LX 85 1000BASE SX 85 1000BASE T 85 100BASE TX 85 10BASE T 85 text About This Guide 8 CSA statement 91 Glossary 85 A auto IP configuration 33 default IP address 34 default mask 34 D DHCP 86 diagram front panel 10 Discovery 23 dynamic host control protocol 86 H half duplex 87 B bandwidth 85 Baseline Switch 2848 SFP 81 E Ethernet 86 C category 3 cables 86 category 5 cables 86 category 5e cables 86 category 6 cables 86 dient 86 configuration overview 31
61. m Summary m Create m Modify m Remove Summary Use the Summary tab to display Group ID Port members and Link Type for a list of link aggregate groups Figure 40 Link Aggregation Summary Screen Summary Creste Modify Remove GrouplD Ports Link Type Create Use the Create tab to add ports to a group membership Figure 41 Link Aggregation Create Screen E ce a EE nter aggregation group id 1 Select ports for the mew aggregation Selected Ports Deselected Ports Member af the aggregation being created LI Not a member of any aggregation and LACP s disabled on thes port ER Ti pon is member of an existing aggregation Summary group ID Member Ports Zion Town Configuring Port Settings 57 To create a new link aggregation group 1 Enter a link aggregation group ID in the box field 2 Select the ports to add to the goup 3 Click Apply Modify Use the Modify tab reassign port members to a link aggregation group Figure 42 Link Aggregation Modify Screen EEE e Solect Aggregation to Modity 7 Seed Select ports to add to aggingation or De select ports 10 remow from aggregaion Selnctod Ports Dosnleciod Ports Marber ef the aggregation Meta member of any and LACP is disabled on this port eoe a member ofan existing aggregation Summary group ID Member Ports Enw ewe 58 CHAPTER 4 CONFIGURING THE SWITCH To modify a link
62. n domain regardless of their physical location or connection point in the network A VLAN serves as a logical workgroup with no physical barriers and allows users to share information and resources as though located on the same LAN You can use the Switch to create VLANs to organize any group of ports into separate broadcast domains VLANs confine broadcast traffic to the originating group and help eliminate broadcast storms in large networks This also provides for a more secure and cleaner network environment You can create up to 64 VLANs add specific ports to a chosen VLAN so that the port can only communicate with other ports on the VLAN or configure a port make it a member of all VLANs Communication between different VLANs can only take place if they are all connected to a router or layer 3 switch The Device menu includes five items VLAN m Spanning Tree m IGMP Snooping m IGMP Query m Broadcast Storm VLAN Click Device then VLAN on the menu A screen appears with seven tabs that include m Setup m Modify VLAN m Modify Port m Rename m Remove m Port Detail m VLAN Detail Setup Use the Setup screen to create VLANs on the Switch To propagate information about VLAN groups used on this Switch to external devices you must specify a VLAN ID for each VLAN Configuring VLANs 43 Figure 24 Setup Screen ORL Por Renamo Remove Pon Detail Create VLANs me L creme Ex
63. nformation Checking for Correct Operation After you power on the Switch it automatically performs a power on self test POST During POST the Power LED on the front panel of the Switch flashes green When POST is complete the Power LED turns green If the Power LED turns yellow after POST it means that POST failed and the Switch has entered fail safe mode The following summarizes the possible colors for the Power LED after POST Status Meaning Green The unit is powered on and ready to use Yellow Power on self test or loopback test failed The Switch is in fail safe mode This can happen if a port or ports fail when the Switch was powered on Off The unit is not receiving power m Verify that the power cord is connected cor rectly and then try powering on the Switch again m f the Switch still does not operate contact your 3Com network supplier If POST fails try the following m Power off the Switch and then power it on again Check the Power LED and see if POST was successfully completed m Reset the Switch See Resetting to Factory Defaults on page 73 N CAUTION Resetting the Switch to its factory defaults erases all your settings You will need to reconfigure the Switch after you reset it If these do not resolve the issue m Check the 3Com Knowledgebase for a solution To visit the 3Com Knowledgebase Web site start your Web browser and then enter http knowledgebase 3com com m Cont
64. ng Network A Network is a collection of computers and other computer equipment that are connected for the purpose of exchanging information or sharing resources Networks vary in size some are within a single room others span continents Ping Packet Internet Groper An Internet utility used to determine whether a particular IP address is online It is used to test and debug a network by sending out a packet and waiting for a response Protocol A set of rules for communication between devices on a network The rules dictate format timing sequencing and error control RJ 45 A standard connector used to connect Ethernet networks The RJ stands for registered jack Server A computer in a network that is shared by multiple end stations Servers provide end stations with access to shared network services such as computer files and printer queues SFP Small Form Factor Pluggable SFP Connectors are based on an open standard that enables hot swapping of various type of fiber optic and copper based transceivers into the host equipment Subnet Address An extension of the IP addressing scheme that allows a site to use a single IP network address for multiple physical networks Subnet Mask A subnet mask which may be a part of the TCP IP information provided by your ISP is a set of four numbers configured like an IP address It is used to create IP address numbers used only within a particular network as
65. ng Do not place objects on top of the unit or stack CAUTION If installing the Switch in a free standing stack of different size Baseline or Superstack 3 units the smaller units must be installed above the larger ones Do not have a free standing stack of more than six units Using the Mounting Kit The Switch is supplied with two mounting brackets and four screws These are used for rack mounting the unit When mounting the unit you should take note of the guidelines given in Positioning the Switch on page 15 The Switch is 1U 1 7 inches high and will fit in a standard 19 inch rack CAUTION Disconnect all cables from the unit before continuing Remove the self adhesive pads from the underside of unit if already fitted To rack mount the Switch Place the unit the right way up on a hard flat surface with the front facing towards you Locate a mounting bracket over the mounting holes on one side of the unit 3 Insert the two screws supplied in the mounting kit and fully tighten with a suitable screwdriver Figure 2 Rack Mounting the Unit N aaaaaan AA A A V Y N N N BRBRERER X N maaaaau maaaaau 6 Repeat steps 2 and 3 for the other side of the unit Insert the unit into the 19 inch rack and secure with suitable screws not provided Reconnect the cables Montagesatz Anweisungen Der Switch wird mit zwei Halte
66. ngs for a port Port Mirroring Statistics QoS VoIP Traffic Setting Security Radius Client Monitor traffic going in and out of ports Display statistics for a selected port Configures QoS settings Contains tabs that allow you to a Display Voice VLAN summary a Configure Voice VLAN global settings m Configure Voice VLAN port settings a Display port information for Voice VLAN and Trunk details a Display OUI summary a Add or remove OUI Configures security settings Contains tabs that allow you to a Display Radius Client information m Configure Radius Client settings and set authentication parameters Menu Item Description 802 1X Settings Monitoring Address Table Cable Diagnostics Help Log Out Contains tabs that allow you to a Display system authentication summary a Display detailed information per port m Configure system authentication settings Display Switch monitoring information Displays MAC address table information for ports and VLANs Contains tabs that allow you to a Display selected cable diagnostics information for all ports a Display all cable diagnostics information for a single port Displays 3Com contact information and describes how to use the online help system Allows you to securely log off the Web interface Navigating the Web Interface 29 Buttons Depending on the screen that is currently displayed the foll
67. nnections below Auto or autonegotiation sets the optimum combination of speed and duplex that can be supported by both ends of the link Duplex Sets the duplex mode of the port Available options include auto half and full CAUTION It is advised not to enable Flow Control on ports that will be connected to telephony and other time sensitive traffic as it may hamper the QoS performance If you modify any of these settings click Apply to save your changes Figure 39 Port Administration Setup Screen De Setup Select AR Cancel etm ability to meet QoS requirements of nea time applications under scene rare Jeet Guide Speed Duplex for 1000 Mbps Connections You cannot preset the speed to 1000 Mbps To run a port at 1000 Mbps you must enable autonegotiation for the port When autonegotiation is enabled the Switch will automatically connect at 1000 Mbps providing the connected device also supports this speed Configuring Port Settings 55 1000 Mbps connections are always full duplex Half duplex connections are only available for 10 Mbps and 100 Mbps settings CAUTION Before manually setting a port to full duplex verify that the device connected to the port is also manually set to the same speed and duplex setting If connecting link partners are left to autonegotiate for a link manually set on this switch to full duplex they will always negotiate to half duplex resulting in
68. o that the fiber connector is toward you and the product label is visible as shown in Figure 3 Ensure the wire release lever is closed in the upright position Figure 3 Inserting an SFP Transceiver Product label Wire release lever Suitable slot on host Switch 2 Gently slide the transceiver into the SFP slot until it clicks into place N CAUTION SFP transceivers are keyed and can be properly inserted only one way If the transceiver does not click when you insert it remove it turn it over and reinsert it 3 Remove the plastic protective cover if fitted 4 Connect the fiber cable 5 Attach a male duplex LC connector the network cable into the duplex LC connector on the transceiver 6 Connect the other end of the cable to a device fitted with an appropriate Gigabit Ethernet connection 7 Check the Module Active LEDs on the front of the Switch to ensure that the SFP transceiver is operating correctly Removing an SFP Transceiver Removing an SFP transceiver does not require powering off the Switch To remove an SFP transceiver 1 Disconnect the cable from the transceiver 2 Move the wire release lever downwards until it is pointing toward you 3 Pull the wire release lever toward you to release the catch mechanism The SFP transceiver should slide out easily Performing Spot Checks 21 Performing Spot Checks At frequent intervals you should visually check the Switch R
69. ollowing options Auto Requires a dot1x aware client to be authorized by the authentication server Clients that are not dot1x aware will be denied access a Force Authorized Forces the port to grant access to all clients either dot1x aware or otherwise a Force Unauthorized Forces the port to deny access to all clients either dot1x aware or otherwise a Maximum Request Sets the maximum number of times the switch port will retransmit an EAP request packet to the client before it times out the authentication session Range 1 10 Default 2 Mode Reauthentication Sets the client to be re authenticated after the interval specified by the Re authentication Period Re authentication can be used to detect if a new device is plugged into a switch port Default Disabled Max Count The maximum number of hosts that can connect to a port when the Multi Host operation mode is selected Range 1 1024 Default 5 Security 69 m Reauthentication Period Sets the time period after which a connected client must be re authenticated Range 1 65535 seconds Default 3600 seconds m Quiet Period Sets the time that a switch port waits after the Max Request Count has been exceeded before attempting to acquire a new client Range 1 65535 seconds Default 60 seconds m Transmit Period Sets the time period during an authentication session that the Switch waits before re transmitting an EAP packet
70. opposed to valid IP address numbers recognized by the Internet which must assigned by InterNIC Subnets A network that is a component of a larger network 89 Switch A device that interconnects several LANs to form a single logical LAN that comprises of several LAN segments Switches are similar to bridges in that they connect LANs of a different type however they connect more LANs than a bridge and are generally more sophisticated TCP IP Transmission Control Protocol Internet Protocol This is the name for two of the most well known protocols developed for the interconnection of networks Originally a UNIX standard TCP IP is now supported on almost all platforms and is the protocol of the Internet TCP relates to the content of the data travelling through a network ensuring that the information sent arrives in one piece when it reaches its destination IP relates to the address of the end station to which data is being sent as well as the address of the destination network Traffic Monitoring Enables the monitoring of port traffic by attaching a network analyzer to one switch port in order to monitor the traffic of other ports on the Switch Trunking A method which specifies how to create a single high speed logical link that combines several lower speed physical links 90 GLOSSARY VLAN A Virtual LAN is a collection of network nodes that share the same collision domain regardless of their p
71. owing buttons may appear Apply Click to save and apply any changes that you have made m Cancel Click to discard any unsaved changes m Help Click to display the context sensitive help information for the screen that is currently displayed The help pages provide information on the tasks that you can perform on each screen Port Status There is an image of the Switch s front panel in the Device View page which indicates ports that are currently in use To configure a port click the port on the image for the these following configuration options m View detailed port information m Configure the port settings m View port statistics 30 CHAPTER 3 CONNECTING TO THE WEB INTERFACE Accessing the Interface Without Using Discovery The Discovery application works by automatically detecting the IP address that is assigned to the Switch and then using that address to connect to the Web interface If you know the Switch s IP address you can access the Web interface without using Discovery This section describes how to access the inter face directly without using Discovery gt If you do not configure the Switch s IP address settings it will perform auto IP configuration to assign an IP address to itself For more informa tion refer to Automatic IP Configuration on page 33 To determine the IP address that the Switch will assign to itself during auto IP configuration check the sticker on the base of th
72. r and a host number IP Address ISP LAN Internet Protocol Address unique identifier for a device attached to a network using TCP IP The address is written as four octets separated with periods full stops and is made up of a network section an optional subnet section and a host section Internet Service Provider An ISP is a business that provides connectivity to the Internet for individuals and other businesses or organizations Local Area Network A network of end stations such as PCs printers servers and network devices hubs and 88 GLOSSARY switches that cover a relatively small geographic area usually not larger than a floor or building LANs are characterized by high transmission speeds over short distances up to 1000 metres Layer 2 Data Link layer in the ISO 7 Layer Data Communications Protocol This is related directly to the hardware interface for the network devices and passes on traffic based on MAC addresses Link Aggregation See Trunking MAC Media Access Control A protocol specified by the IEEE for determining which devices have access to a network at any one time MAC Address Media Access Control Address Also called the hardware physical or Ethernet address A layer 2 address associated with a particular network device Most devices that connect to a LAN have a MAC address assigned to them as they are used to identify other devices in a network MAC addresses are 6 bytes lo
73. rt number and serial number m Proof of purchase if you have not pre registered your product m list of system hardware and software including revision level m Diagnostic error messages m Details about recent configuration changes if applicable To send a product directly to 3Com for repair you must first obtain a return authorization number RMA Products sent to 3Com without authorization numbers clearly marked on the outside of the package will be returned to the sender unopened at the sender s expense If your product is registered and under warranty you can obtain an RMA number online at http eSupport 3com com First time users will need to apply for a user name and password Contact Us 3Com offers telephone e mail and Internet access to technical support and repair services To access these services for your region use the appropriate telephone number URL or e mail address from the list below Telephone numbers are correct at the time of publication Find a current directory of support telephone numbers posted on the 3Com Web site at http csoweb4 3com com contactus Country Telephone Number Contact Us 79 Asia Pacific Rim Telephone Technical Support and Repair Australia 1 800 678 515 Hong Kong 800 933 486 India 61 2 9424 5179 or 000800 6501111 Indonesia 001 803 61 009 Japan 00531 616 439 or 03 3507 5984 Malaysia 1800 801 777 New Zealand 0800 446 398 Pakistan 61 2 9937 5083
74. rungen und vier Schrauben geliefert Diese werde f r den Einbau in einen Baugruppentr ger benutzt Bei der Montage der Baugruppe beachten Sie die Anweisungen aus Positioning the Switch on page 15 6 Rack Mounting or Free Standing 17 Der Switch ist eine Baueinheit hoch und passt in einen Standard 19 Zoll Baugruppentr ger ACHTUNG Entfernen Sie alle Kabel bevor Sie fortfahren Entfernen Sie die selbstklebenden Polster F e von der Unterseite der Baugruppe falls diese bereits angebracht sind Plazieren Sie die Baugruppe aufrecht auf einer harten ebenen Fl che mit der Vorderseite zu Ihnen Ordnen Sie eine der Halterungen ber den L chern an der Seite der Baugruppe an Stecken Sie zwei der mitgelieferten Schrauben in die L cher und drehen Sie diese mit einem geeigneten Schraubendreher fest Widerholen Sie letzten beiden Schritte auf der anderen Seite der Baugruppe F hren Sie die Baugruppe in den 19 Zoll Baugruppentr ger ein und sichern sie die Baugruppe mit geeigneten Schrauben Nicht im Lieferumfang enthalten Schlie en Sie alle Kabel wieder an Placing Units On Top of Each Other If the Switch units are free standing up to six units can be placed one on top of the other If you are mixing a variety of Baseline and SuperStack units the smaller units must be positioned at the top 18 INSTALLING THE SWITCH If you are placing Switch units one on top of the other you must use the se
75. ry Choose enable or disable from the IGMP Query Mode drop down menu Figure 35 IGMP Query Setup Screen Setup IGMP Query Mode Enable gt Apply Cancel Broadcast Storm Use the Broadcast Storm page to set the Switch s broadcast storm control and threshold limits 52 CHAPTER 4 CONFIGURING THE SWITCH A broadcast storm is an incorrect packet sent out on a network that causes most hosts to respond all at once typically with wrong answers that start the process over again Broadcast storms use substantial network bandwidth and may cause network time outs The settings include m Status Enables and disables broadcast storm control m Packet Rate Threshold Sets the broadcast storm threshold 64 to 1000000 kilobits per second Figure 36 Broadcast Storm Setup Screen Setup Broadcast Storm Control Status Enabled gt Packet Rate Threshold 64 1000000 64 Kbits sec Note Packet threshold is ignored if Broadcast Storm Control is Disabled Apply Cancel Configuring Port Settings 53 Configuring Port Settings f h Use the Summary tab to display Port State Using the Eh ace you can configure the Flow Control Speed Default VLAN ID Link speed duplex low control link aggregation Type or Duplex for all the ports and port mirroring settings of each port You can also view the current connection status o
76. ry large numbers of ports maybe tale a long sme To display statistics for a port 1 Access the Web interface Click Port then Statistics on the menu The Port Statistics Screen appears 2 Select the a port and enter a refresh interval 3 Click Apply QoS VoIP Traffic Settings Using the Web interface you can configure the Voice over Internet Protocol VoIP settings The QoS VolP Traffic Setting menu includes six tabs m Summary m Setup m Port Setup m Port Detail m OUI Summary m OUI Modify Summary Use the Summary tab to display the global settings for Voice VLAN Figure 49 QoS VoIP Summary Screen summary Seau Pense PorOetai Voice VLAN State Disabled Voice 0 Voice VLAN Aging Time 1 Day 0 Hour 0 Min Ports Enabled for Voice VLAN zi Ports in Voice VLAN a a Use the Setup tab to configure the global settings for Voice VLAN The following options are available m Voice VLAN Status Enable or disable Voice VLAN for the switch m Voice VLAN ID Input the Voice VLAN ID for the switch m Voice VLAN Aging Time Input the aging time QoS VolP Traffic Settings 63 You must first create a VLAN from the VLAN Setup page before you can assign and configure a Voice VLAN Figure 50 QoS VoIP Setup Screen EDR se ios oe Voice VLAN Global Settings Voice VLAN Status Disebied VoiceVLAN ID b Voice VLAN Aging Time I Day 0 How Min 5 Min 30 Day
77. sable polling Color Key Description of the color coding Figure 10 Color Key RS C C e C e a MT Pons l Meaning White Unconnected No brik detected Yellow Lower spend on 10 100 1000M capable Green Maximum speed 10 100 1000M RMS or RJ45 Link detected Dark Gray SX SFP Link detected Light Blue DUZX SFP Link detected Light Gray Port has been set to inactive by User or Protocol Dark Blue Port has been selected by user 3232 2323 Red Port or Module has failed POST or module is recognized Description of port number Underline Aggregation number Administration Settings The Administration menu includes eight administration items m P Setup m Backup Configuration m Restore Configuration Administration Settings 33 m Firmware Upgrade m Initialize m Reboot m System Access m System Time m SNMP Modifying the IP Address Settings To enable devices on the network to communicate with the Switch you need to assign an IP address to it either by DHCP or by assigning a static IP address By default the Switch performs automatic IP configuration and assigns an IP address to itself This is necessary for the Discovery application to be able to connect to the Web interface Automatic IP Configuration When you power on the Switch for the first time it automatically uses the default IP address 169 254 x y where x and y are the
78. tch and other network devices IP Setup To set the IP address for the Switch Click Administration then IP Setting on the menu The IP Settings screen appears Follow the IP Setup Wizard to complete the setup This wizard can also be used to set system name location and contact information Figure 11 Settings Screen WP Setup O Welcome to the IP Setup Wizard This wizard helps you setup modify or quickly view the IP configuration parameters To continue click Next Progress 0 Next gt Cancel Backup Configuration To save the Switch configuration settings 1 Click Administration then Backup Configuration on the menu The Backup Configuration screen appears Administration Settings 35 Figure 12 Backup Configuration Backup Configuration This operation backs up the saved configuration file of this device via HTTP Caution If you have changed the configuration since the fast savo you are recommended to save the configuration fle before backing up Source File cl x le 2 Click OK You will be prompted to provide a location where the configuration file will be saved Restore Configuration To reload configuration settings that you previously saved to a file 1 Click Administration then Restore Configuration on the menu The Restore Configuration screen appears Figure 13 Restore Configuration Restore Configuration This will restore the Saved
79. the mounting kit supplied IEC 320 47 63 Hz 3 Hz 100 240 VAC auto range 2 Amp maximum Maximum Power 60 W Consumption Maximum Power Dissipation 286 7 BTU hr 82 APPENDIX B TECHNICAL INFORMATION SAFETY INFORMATION Important Safety Information Please refer to the safety information found in the You can find the 3Com Switch Family Safety and 3Com Switch Family Safety and Regulatory Information Regulatory Information manual on the product CD ROM manual included with this product that was included with your switch You can also download the safety manual from the 3Com Web site www 3Com com 84 APPENDIX C SAFETY INFORMATION GLOSSARY 10BASE T The IEEE specification for 10 Mbps Ethernet over Category 3 4 or 5 twisted pair cable 100BASE TX The IEEE specification for 100 Mbps Fast Ethernet over Category 5 twisted pair cable 1000BASE LX IEEE 802 3z specification for Gigabit Ethernet over 9 125 micron core single mode fiber cable 1000BASE SX IEEE 802 3z specification for Gigabit Ethernet over two strands of 50 125 or 62 5 125 micron core multimode fiber cable 1000BASE T IEEE 802 3ab specification for Gigabit Ethernet over 100 ohm Category 5 5e or 6 twisted pair cable using all four wire pairs Auto negotiation Auto negotiation is where two devices sharing a link automatically configure to use the best common speed The order of preference best first is 1000BASE T
80. the port is an untagged member of a VLAN the frame is accepted and assigned to that VLAN ID Otherwise if the port is not an untagged member of any VLAN the frame is discarded The Switch will only forward a frame to ports that are members tagged or untagged of the VLAN to which the frame is assigned If the port is an untagged member the egress frame will be stripped of the VLAN tag and forwarded as untagged However if the port is a tagged member the egress frame is forwarded as tagged Sample VLAN Configurations To illustrate how you can segment network devices that are connected to the Switch the following sample configurations are provided 48 CHAPTER 4 CONFIGURING THE SWITCH Setting Up Two VLANs on the Same Switch Figure 31 illustrates how you can set up a simple VLAN on the Switch using desktop connections Figure 31 Desktop VLAN Configuration Endstations Endstations in VLAN 1 in VLAN 2 Server Server in VLAN 1 in VLAN 2 If you want to add ports 1 3 and 26 to VLAN2 as shown in Figure 31 so that the ports on the default VLAN1 and the ports on VLAN2 cannot communicate with each other do the following Create a new VLAN and set the VLAN ID to 2 Refer to Setup for instructions VLAN1 is the default VLAN and already exists Set ports 1 3 and 26 to associate with the Untagged membership in VLAN2 Click Apply Ports 1 3 and 26 now belong to VLAN2 and wil
81. this guide consequently it assumes a basic working knowledge of Table 1 Notice Icons LANs Local Area Networks Icon Notice Type Description Diese Anleitung ist fur die Benutzung durch Information note Information that describes Netzwerkadministratoren vorgesehen die fur die important features or instructions Installation und das einstellen von Caution Information that alerts you to Netzwerkkomponenten verantwortlich sind sie setzt N potential loss of data or potential Erfahrung bei der Arbeit mit LANs Local Area Networks damage to an application system voraus or device Warning Information that alerts you to potential personal injury gt If release notes are shipped with your product and the information there differs from the information in this guide follow the instructions in the release notes Most user guides and release notes are available in Adobe Acrobat Reader Portable Document Format PDF or HTML on the 3Com World Wide Web site www 3com com ABOUT THIS GUIDE Table2 Text Conventions Convention Description The words enter When you see the word enter in this and type guide you must type something and then press Return or Enter Do not press Return or Enter when an instruction simply says type Keyboard key names If you must press two or more keys simultaneously the key names are linked with a plus sign Example Press Ctrl Alt Del Words in italics Itali
82. tore Configuration 35 Firmware Upgrade 36 Initialize 37 Reboot 37 System Access 38 System Time 40 SNMP 40 Configuring VLANs 42 43 Forwarding Tagged Untagged Frames 47 Sample VLAN Configurations 47 Spanning Tree 49 IGMP Snooping 51 IGMP Query 51 Broadcast Storm 51 Configuring Port Settings 53 Administration 53 Speed Duplex for 1000 Mbps Connections 55 Link Aggregation 56 Spanning Tree per Port 58 Port Mirroring 61 Statistics 62 QoS VoIP Traffic Settings 62 Security 65 RADIUS Client 65 802 1X Settings 67 Monitoring 70 Address Table 70 Cable Diagnostics 70 TROUBLESHOOTING Resetting to Factory Defaults 73 Forgotten Password 74 Forgotten Static IP Address 74 Solving LED Issues 74 If the Problem Persists 76 OBTAINING SUPPORT FOR YOUR PRODUCT Register Your Product 77 Purchase Value Added Services 77 Troubleshoot Online 77 Access Software Downloads 77 Telephone Technical Support and Repair 78 Contact Us 78 TECHNICAL INFORMATION Related Standards 81 Environmental 81 Physical 81 Electrical 81 SAFETY INFORMATION Important Safety Information 83 GLOSSARY REGULATORY NOTICES INDEX ABOUT THIS GUIDE This guide describes how to install your 3Com Switch and perform initial management configurations Conventions This guide is intended for use by those responsible for Table 1 and Table 2 list conventions that are used installing and setting up network equipment throughout
83. y the Root Bridge If a bridge does not get a Hello BPDU after a predetermined interval the bridge assumes that the link to the Root Bridge is down This bridge will then initiate negotiations with other bridges to reconfigure the network to re establish a valid network topology After all the bridges on the network have determined the configuration of their ports each bridge only forwards traffic between the Root Port and the ports that are the Designated Bridge Ports for each network segment All other ports are blocked which means that they are prevented from forwarding traffic Three tabs are available on the Spanning Tree per Port page m Summary m Detail m Setup Configuring Port Settings 59 Summary Use the Summary tab to display Status Edged Port Link Type Path Cost State or Port Priority for all the ports Figure 44 Spanning Tree Summary Screen Summary ST Select Feature Status C Path Cost C Edged Port C State C Link Type C Port Priority Feature Summary Ports Setting Enabled Enabled 3 Enabled 4 Enabled 5 Enabled 6 Enabled 7 Enabled 8 Enabled 60 CHAPTER 4 CONFIGURING THE SWITCH Detail Use the Detail tab to display detailed spanning tree information for a port Figure 45 Spanning Tree Detail Screen ese Value in Brackets true value fer poet Setup Use the Setup tab to configure the spanning tree settin
84. y will be provided to you UNITED STATES GOVERNMENT LEGEND If you are a United States government agency then this documentation and the software described herein are provided to you subject to the following All technical data and computer software are commercial in nature and developed solely at private expense Software is delivered as Commercial Computer Software as defined in DFARS 252 227 7014 June 1995 or as a commercial item as defined in FAR 2 101 a and as such is provided with only such rights as are provided in 3Coms5 standard commercial license for the Software Technical data is provided with limited rights only as provided in DFAR 252 227 7015 Nov 1995 or FAR 52 227 14 June 1987 whichever is applicable You agree not to remove or deface any portion of any legend provided on any licensed program or documentation contained in or delivered to you in conjunction with this User Guide Unless otherwise indicated 3Com registered trademarks are registered in the United States and may or may not be registered in other countries 3Com 3Com trademarks o Express 3Com Guardian and the 3Com logo are registered 3Com Corporation IEEE and 802 are registered trademarks of the Institute of Electrical and Electronics Engineers Inc Intel is a registered trademark of Intel Corporation Windows and Windows NT are registered trademarks of Microsoft Corporation Xerox is a registered trademark of Xerox Corporation UNIX is a reg

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