Baseline Switch 2226 Plus User Guide Installationsanleitung 3C16475CS www.3com.com Part No. 10015240 Rev. AA Published August 2006 http://www.3com.com/ Part No.
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.
CONTENTS 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 ABOUT THIS GUIDE Conventions 7 Documentation Comments Product Registration 8 1 8 INTRODUCING THE BASELINE SWITCH Overview of the Baseline Switch 9 Features and Capabilities 9 Autosensing of MDI/MDIX Connections 9 Autonegotiating 10/100 Mbps Ports 9 Gigabit Combo Ports (RJ-45/SFP) 9 Physical Features 10 Front Panel 10 Re
IP Setup 34 Backup Configuration 35 Restore Configuration 35 Firmware Upgrade 36 Initialize 37 Reboot 37 System Access 38 System Time 40 SNMP 40 Configuring VLANs 42 VLAN 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 Link Aggregation 56 Spanning Tree per Port 58 Port Mirroring 61 Statistics 62 QoS VoIP Traffic Settings 62 Security 65
GLOSSARY REGULATORY NOTICES INDEX
ABOUT THIS GUIDE This guide describes how to install your 3Com Switch and perform initial management configurations. Conventions Table 1 and Table 2 list conventions that are used throughout this guide. This guide is intended for use by those responsible for installing and setting up network equipment; consequently, it assumes a basic working knowledge of LANs (Local Area Networks).
ABOUT THIS GUIDE Table 2 Text Conventions Convention Description The words “enter” and “type” When you see the word “enter” in this 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 Words in italics If you must press two or more keys simultaneously, the key names are linked with a plus sign (+). Example: Press Ctrl+Alt+Del Italics are used to: ■ Emphasize a point.
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 versatile, easy-to-use unmanaged switch.
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.
Physical Features 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.
INTRODUCING THE BASELINE SWITCH Off The link has not been established, either nothing is connected to the port, or there is a problem: Off Check that the attached device is powered on. ■ 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 checks do not identify the cause of the problem, it may be that the unit or the device connected to the port is faulty.
Physical Features 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. ■ Check that the power cord is connected correctly. ■ If the unit still does not operate, contact your supplier.
INTRODUCING THE BASELINE SWITCH Package Contents Before installing and using the Switch, verify that your Switch package is complete. The Switch comes with: ■ One power cord ■ Four standard height, self-adhesive rubber pads ■ One mounting kit ■ Installation CD ■ This User Guide ■ 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: ■ Before You Begin ■ Positioning the Switch ■ Rack-Mounting or Free-Standing ■ Supplying Power to the Switch ■ Using SFP Transceivers ■ Performing Spot Checks Before You Begin WARNING: Safety Information.
INSTALLING 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. Rack-Mounting or Free-Standing The unit can be mounted in a 19-inch equipment rack using the mounting kit or it can be free standing. Do not place objects on top of the unit or stack. When deciding where to position the Switch, ensure that: ■ It is accessible and cables can be connected easily.
Rack-Mounting or Free-Standing 3 Insert the two screws supplied in the mounting kit and fully tighten with a suitable screwdriver. Der Switch ist eine Baueinheit hoch und passt in einen Standard 19'' (Zoll) Baugruppenträger. Figure 2 ACHTUNG: Entfernen Sie alle Kabel, bevor Sie fortfahren. Entfernen Sie die selbstklebenden Polster (Füße) von der Unterseite der Baugruppe, falls diese bereits angebracht sind. Rack Mounting the Unit 4 Repeat steps 2 and 3 for the other side of the unit.
INSTALLING THE SWITCH If you are placing Switch units one on top of the other, you must use the self-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 Power problems can be the cause of serious failures and downtime in your network.
Using SFP Tranceivers Off The unit is not receiving power: ■ Verify that the power cord is connected correctly, and then try powering on the Switch again ■ If the Switch still does not operate, contact your 3Com network supplier If POST fails, try the following: ■ ■ Power off the Switch, and then power it on again. Check the Power LED and see if POST was successfully completed. Reset the Switch. See “Resetting to Factory Defaults” on page 73.
INSTALLING THE SWITCH ■ 1000BASE-LX SFP transceiver Use this transceiver to connect the Switch directly to a single mode fiber-optic cable or to multimode fiber using a conditioned launch cable. 2 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. If the SFP transceiver is faulty, it will not operate within the Switch. See “Troubleshooting” on page 73.
Performing Spot Checks Performing Spot Checks At frequent intervals, you should visually check the Switch. Regular 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.
INSTALLING THE SWITCH
3 CONNECTING TO THE WEB INTERFACE The Switch has a built-in Web interface that you can use to set the admin password, change the IP address that is assigned to the Switch, and configure its advanced settings. If you only want the Switch to function as a basic layer 2 switch, you do not need to access the Web interface and configure the Switch. This chapter provides information on how the gain access to the Web interface using the Discovery application.
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. Figure 4 Welcome Screen of Discovery To use Discovery to connect to the Web interface, do the following: 1 On a computer that is connected to the Switch, insert the CD-ROM into its CD drive. Discovery should start automatically.
Logging On to the Web Interface Figure 5 Discovered Devices Screen 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.
CHAPTER 3: CONNECTING TO THE WEB INTERFACE Navigating the Web Interface Figure 7 Switch Screen Layout Sub-Menu Tabs The Web interface has been designed 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 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.
Navigating the Web Interface Table 1 lists the available items on the menu. Table 1 Available Menu Items Menu Item Description Device Summary System Access Contains tabs that allow you to: ■ Provide a summary of the Switch’s basic settings and versions of current components. ■ Set the polling interval in seconds. ■ Display the description for each color coded port. Save Configuration Saves the Switch’s configuration. Administration Manages the device.
CHAPTER 3: CONNECTING TO THE WEB INTERFACE Menu Item Description IGMP Snooping Allows you to enable or disable IGMP snooping. IGMP Query Allows you to enable or disable IGMP query mode. Broadcast Storm Port Administration Allows you to enable or disable rate limiting. Spanning Tree per Port Monitor traffic going in and out of ports. Statistics Display statistics for a selected port.
Navigating the Web Interface Menu Item 802.1X Settings Monitoring Description Contains tabs that allow you to: ■ Display system authentication summary. ■ Display detailed information per port. ■ Configure system authentication settings. Display Switch monitoring information. Address Table Displays MAC address table information for ports and VLANs. Cable Diagnostics Contains tabs that allow you to: ■ Display selected cable diagnostics information for all ports.
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 interface directly, without using Discovery.
4 CONFIGURING THE SWITCH This chapter provides information on how to configure the Switch’s advanced features.
CHAPTER 4: CONFIGURING THE SWITCH ■ 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. If you request for technical assistance from 3Com Support, you may be asked to print out the information on this screen.
Administration Settings Color Key ■ Firmware Upgrade Description of the color coding. ■ Initialize ■ Reboot ■ System Access ■ System Time ■ SNMP Figure 10 Color Key 33 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.
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: 1 The Switch tries to configure itself with the default IP address 169.254.x.
Administration Settings Figure 11 IP Settings Screen Figure 12 Backup Configuration 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 Backup Configuration To save the Switch configuration settings: 1 Click Administration, then Backup Configuration on the menu. The Backup Configuration screen appears.
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. 3 Click Restore to copy the configuration back to the Switch. For security purposes, restoring the configuration does not change the password. Firmware Upgrade The Upgrade facility allows you to install on the Switch any new releases of system firmware that 3Com may make available.
Administration Settings 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.
CHAPTER 4: CONFIGURING THE SWITCH System Access Click Administration, then System Access on the menu. A screen appears with six system access tabs: ■ User Summary ■ Create User ■ Modify User ■ Remove User To prevent unauthorized users from accessing the Web interface and modifying the Switch’s settings, the interface is password-protected.
Administration Settings 39 Create User Modify User This page allows you to create a user and define the access level and password for that user. This page allows you to modify a user’s access level and password.
CHAPTER 4: CONFIGURING THE SWITCH Remove User Figure 19 System Time Screen To remove a user from the Switch, click on the user name, then click Remove. Figure 18 Remove User Screen SNMP 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. Simple Network Management Protocol (SNMP) is a communication protocol designed specifically for managing devices on a network.
Administration Settings ■ SNMP Remove Summary SNMP Add This page allows you to create community strings for management access. Displays the list community access strings. Figure 22 SNMP Add Screen Figure 20 SNMP Summary Screen Setup Enable or disable the SNMP Agent Status.
CHAPTER 4: CONFIGURING THE SWITCH SNMP Remove This page allows you to remove community strings. Figure 23 SNMP Remove Screen 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.
Configuring VLANs VLAN 43 Figure 24 Setup Screen Click Device, then VLAN on the menu. A screen appears with seven tabs that include: ■ Setup ■ Modify VLAN ■ Modify Port ■ Rename ■ Remove ■ Port Detail ■ 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.
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 1 Enter a set of VLANs or select all VLANs to configure, then click Select.
Configuring VLANs Figure 26 Modify Port Screen 45 Rename Use the Rename screen to change the name of a VLAN. Figure 27 Rename Screen 1 Select a membership use. Available options for each port include (only one option can be associated with a single port): ■ Not a member ■ Tagged ■ Untagged 2 Select a port to associate with the membership. 3 Enter a VLAN to apply these changes to, then click Apply. 1 Enter a set of VLANs or select all VLANs to add to the rename list, then click Select.
CHAPTER 4: CONFIGURING THE SWITCH Remove Port Detail Use the Remove screen to remove a VLAN. Choose a port to display the tagged and untagged VLAN memberships it is associated with. Figure 28 Remove Screen Figure 29 Port Detail Screen 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 Select All button to select all the VLANs. Click Remove to remove the VLAN.
Configuring VLANs is not a member of that VLAN, the frame is discarded. Figure 30 VLAN Detail Screen ■ Forwarding Tagged/Untagged Frames Each port on the Switch is capable of passing tagged or untagged frames. 47 When a port receives an untagged frame and 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.
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 cannot communicate with each other, do the following: 1 Create a new VLAN and set the VLAN ID to 2. Refer to “Setup” for instructions. VLAN1 is the default VLAN and already exists. 2 Set ports 1, 3, and 26 to associate with the Untagged membership in VLAN2. 3 Click Apply.
Configuring VLANs Figure 32 Tagged VLAN Configuration 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. 3 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. 4 Connect the Tagged port on Switch 1 (in this example, port 16) to the Tagged port on Switch 2 (in this example, port 8).
CHAPTER 4: CONFIGURING THE SWITCH path is maintained between spanning tree-compliant networked devices by: ■ Disabling redundant paths when the main paths are operational. ■ 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.
Configuring VLANs 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.
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: ■ Status – Enables and disables broadcast storm control. ■ Packet Rate Threshold – Sets the broadcast storm threshold (64 to 1000000 kilobits per second).
Configuring Port Settings Configuring Port Settings Using the Web interface, you can configure the speed/duplex, flow control, link aggregation, and port mirroring settings of each port. You can also view the current connection status of each port or shut down or disable ports.
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 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.
Configuring Port Settings If you modify any of these settings, click Apply to save your changes. 55 1000 Mbps connections are always full-duplex. Half-duplex connections are only available for 10 Mbps and 100 Mbps settings. Figure 39 Port Administration Setup Screen 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.
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).
Configuring Port Settings Figure 40 Link Aggregation Summary Screen 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 Create Use the Create tab to add ports to a group membership. Use the Modify tab reassign port members to a link aggregation group.
CHAPTER 4: CONFIGURING THE SWITCH To modify a link aggregation group: 1 Select the aggregation group to modify, then click Select. 2 Select the ports to add to the goup. 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. 3 Click Apply. Remove Use the Remove tab delete a link aggregation group.
Configuring Port Settings 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 re-establish a valid network topology.
CHAPTER 4: CONFIGURING THE SWITCH Detail ■ Use the Detail tab to display detailed spanning tree information for a port. 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. ■ Port Priority – Used in selecting the root device, root port, and designated port.
Configuring Port Settings Port Mirroring 61 Figure 47 Port Mirroring Setup Screen 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).
CHAPTER 4: CONFIGURING THE SWITCH Statistics The Switch allows you to statistics of a particular port. Figure 48 Port Statistics Screen 3 Click Apply. QoS VoIP Traffic Settings Using the Web interface, you can configure the Voice over Internet Protocol (VoIP) settings. The QoS VoIP Traffic Setting menu includes six tabs: To display statistics for a port: 1 Access the Web interface. Click Port, then Statistics on the menu. The Port Statistics Screen appears.
QoS VoIP Traffic Settings Summary Use the Summary tab to display the global settings for Voice VLAN. Figure 49 QoS VoIP Summary Screen 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 Port Setup Setup Use the Setup tab to configure the global settings for Voice VLAN. The following options are available: ■ Voice VLAN Status – Enable or disable Voice VLAN for the switch.
CHAPTER 4: CONFIGURING THE SWITCH To configure the Voice VLAN settings for ports: Figure 52 QoS Port Detail Screen 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 OUI Summary Use the OUI Summary tab to display the list of Organizational Unique Identifier for a company and their description.
Security OUI Modify 65 Figure 54 QoS OUI Modify Screen Use the OUI Modify tab to add to the list of Organizational Unique Identifier. The following options are available: ■ Telephony OUI – Input a new company identifier to add to the list. ■ Description – Input a description for the new company identifier. To add to the OUI list: 1 Enter a Telephony OUI and description. 2 Click Add. To remove an OUI from the list: 1 Select a Telephony OUI from the list. 2 Click Remove.
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. Figure 55 RADIUS Client Detail Screen The RADIUS Client menu includes two tabs: ■ Detail ■ Configure Detail Use the Detail tab to display the RADIUS Client settings.
Security ■ UDP port – The RADIUS server UDP port used for authentication messages. ■ Key – Sets the RADIUS encryption key. 67 802.1X Settings After you have filled in the parameters, click Apply to save your changes. 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. Figure 56 RADIUS Client Configure Screen The 802.
CHAPTER 4: CONFIGURING THE SWITCH Figure 57 802.1X Summary Screen Figure 58 802.1X Detail Screen Setup Detail Use the Detail tab to display detailed 802.1X authentication information for a port.. Use the Setup tab to configure the 802.1X authenticaion settings. The following fields are available: ■ System Authentication – Sets the global setting for 802.1X. (Default: Disabled) ■ Operation Mode – Allows single or multiple hosts (clients) to connect to an 802.1X-authorized port.
Security ■ ■ ■ ■ 69 Auto – Requires a dot1x-aware client to be authorized by the authentication server. Clients that are not dot1x-aware will be denied access. ■ Reauthentication Period – Sets the time period after which a connected client must be re-authenticated. (Range: 1-65535 seconds; Default: 3600 seconds) Force-Authorized – Forces the port to grant access to all clients, either dot1x-aware or otherwise.
CHAPTER 4: CONFIGURING THE SWITCH Figure 59 802.1X Setup Screen Figure 60 Address Table Screen Monitoring Using the Web interface, you can display address table information and cable diagnostics. Cable Diagnostics ■ Address Table The Switch provides cable diagnostic, which helps you detect and resolve issues with the attached cables.
Monitoring 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 Diagnostics Use the Diagnostics tab to display individual port information on Test Result, Cable Fault Distance, and Last Update.
CHAPTER 4: CONFIGURING THE SWITCH
5 TROUBLESHOOTING This chapter lists some issues that you may encounter while installing, using, and managing the Switch, with suggested courses of corrective 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. CAUTION: Resetting the Switch to factory defaults erases all your settings.
CHAPTER 5: TROUBLESHOOTING The Switch will perform automatic IP configuration after you reset it. See “Automatic IP Configuration” on page 33 for more information. For information on using the Discovery application, refer to “Running the Discovery Application” on page 23. Solving LED Issues 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 Factory Defaults” on page 73 for instructions.
Solving LED Issues ■ If the connection is to a workstation, that the workstation's network interface is installed and configured correctly. ■ 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 recommends Category 5e or 6 cables for 1000BASE-T operation. A fiber cable is connected, but the Module Active LED is off.
CHAPTER 5: TROUBLESHOOTING All ports appear to show continual activity. There may be broadcast storms on the network. Remove port connections one at a time, waiting a few seconds between each port. If the LEDs go off after removing a port connection, 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.
A OBTAINING SUPPORT 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 warranty 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.
APPENDIX A: OBTAINING SUPPORT FOR YOUR PRODUCT Updates you must first register your product on the 3Com Web site at http://eSupport.3com.com/. ■ A list of system hardware and software, including revision level 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.
Contact Us 79 . Country Telephone Number Asia, Pacific Rim Telephone Technical Support and Repair Australia Hong Kong India Indonesia Japan Malaysia New Zealand Pakistan Philippines P.R. of China Singapore S.
APPENDIX A: OBTAINING SUPPORT FOR YOUR PRODUCT Country Telephone Number Latin America Telephone Technical Support and Repair Antigua Barbuda Argentina Local Number Argentina Argentina Aruba Bahamas Barbados Belize Bermuda Bolivia Brazil Local Number Brazil British Virgin Islands Cayman Islands Chile Columbia Local Number Colombia Costa Rica Curacao Dominica Dominique Equador El Salvador French Guiana Grenada Guadalupe Guatemala Guyana Haiti Honduras Jamaica Mexico Local Number Mexico Mexico Monserrat
B TECHNICAL INFORMATION Physical Related Standards The Baseline Switch 2226 Plus has been designed to the following standards: Functional 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) 44 cm (17.3 in.) 23.8 cm (9.4 in.) 4.4 cm (1.7 in.) or 1U 3.2 kg (7.05 lb) Free standing, or 19 in.
APPENDIX B: TECHNICAL INFORMATION
C SAFETY INFORMATION Important Safety Information Please refer to the safety information found in the 3Com Switch Family Safety and Regulatory Information manual included with this product. You can find the 3Com Switch Family Safety and Regulatory Information manual on the product CD-ROM that was included with your switch. You can also download the safety manual from the 3Com Web site: www.3Com.
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. Auto-negotiation Auto-negotiation is where two devices sharing a link, automatically configure to use the best common speed.
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.
Full Duplex IETF A system that allows packets to be transmitted and received at the same time and, in effect, doubles the potential throughput of a link. 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. Half Duplex A system that allows packets to be transmitted and received, but not at the same time.
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). purpose of exchanging information or sharing resources. Networks vary in size, some are within a single room, others span continents. Ping Layer 2 Data Link layer in the ISO 7-Layer Data Communications Protocol.
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.
GLOSSARY VLAN A Virtual LAN is a collection of network nodes that share the same collision domain regardless of their physical location or connection point in the network. A VLAN serves as a logical workgroup with no physical barriers, and allows users to share information and resources as though located on the same LAN.
REGULATORY NOTICES FCC Statement CE Statement (Europe) 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.
INDEX Numbers text, About This Guide 8 CSA statement 91 1000BASE-LX 85 1000BASE-SX 85 1000BASE-T 85 100BASE-TX 85 10BASE-T 85 D A DHCP 86 diagram front panel 10 Discovery 23 dynamic host control protocol 86 auto IP configuration 33 default IP address 34 default mask 34 E Ethernet 86 B bandwidth 85 Baseline Switch 2848-SFP 81 C category 3 cables category 5 cables category 5e cables category 6 cables client 86 configuration overview 31 conventions 86 86 86 86 F Fast Ethernet 86 FCC statement 91 Fe
INDEX N T network analyzer 61, 62 network defined 88 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 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 appro
