3Com 3CR17661-91, 3CR17662-91, 3CR17660-91 manual Solving Hardware, Problems

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Solving Hardware Problems

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Auto-negotiation problems will occur with 10BASE-T or 100BASE-T where auto-negotiation is disabled and incorrect cables are being used (cross-over or straight)

Auto-negotiation problems will occur with fiber if:

■The Receiver (RX) and Transceiver (TX) cable connectors are swapped

■Fibers are broken

■Auto-negotiation differs at either end (a link appears at the ‘fixed’ end and not at the auto-negotiation end)

Solving Hardware	In the rare event of your Switch unit experiencing a hardware failure,
Problems	refer to the list of suggested solutions below.

A fan failure warning message is received

Your Switch has a fan monitoring system that will generate fan failure warning messages. Fan failure could potentially reduce the lifetime of the Switch. The monitoring system polls the fan status at periodic intervals while the unit is powered up.

If one fan has failed in the Switch, a warning message will be generated in the following ways:

■Unit LED

The seven segment display will show a green flashing ‘f’.

■RMON Trap

If configured, an RMON trap is generated and sent to the management workstation.

■Command Line Interface

An indication of a general hardware failure is provided through the Top level menu displayed when logging on to the CLI. For more detailed information about the failure select the display logbuffer command.

■Web interface

An indication of fan failure is provided through the Device Summary table for the specific unit. In addition all Summary tables turn red to indicate the fan failure.

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Contents

3Com Switch 4200G Family United States Government Legend 3Com Corporation Campus Drive MarlboroughPage Page Contents Installing the Switch Problem Solving PIN -OUTS About this Guide Icon Description ConventionsConvention Description Documentation RelatedDocumentation Pddtechpubscomments@3com.com CommentsIntroducing Hardware Features Switch 4200G About the Switch 4200GCommander Switch 4200G-Front ViewSwitch 4200G 48-Port-front view Status Display Display Mode LED Color DescriptionColor Indicates Mode LED10/100/1000BASE-T Port LEDs Slots Rear View Detail1000BASE-X Port SFP Port LEDs Configuration Save Feature Switch 4200G Automatic IP ConfigurationDuplex Mode Rmon AlarmInstalling the Switch Choosing a Suitable Package ContentsSite Inch racks To rack-mount your SwitchFront of the Switch, as shown in Figure Rack-mountingFitting a Bracket for Rack-Mounting Repeat and for the other side of the SwitchSequence Power-upPowered-up and ready for operation Switch 4200GSFP Operation LEDs on page 54 for a list of suggested solutionsSFP port Inserting an SFP Transceiver Remove the plastic protective cover if fittedTransceiver Your SwitchChoosing Correct CablesChoosing the Correct Cables Installing the Switch Setting UP for Management Command Line Interface Management Methods of Managing a SwitchRefer to Setting Up Command Line Interface Management on User View There are two main views in the CLISystem View Overview Setting UpSnmp Automatic IP Configuration using Dhcp Manual IP ConfigurationManually Configuring IP Information Prerequisites Connecting the Workstation to the SwitchSetting Up the Switch with IP Information Enter interface vlan 1 and Enter Enter the system-viewcommand and EnterWith a Network Using the Web Interface Using Command Line Interface using Telnet Enter the default gateway for the Switch Viewing Automatically Configured IP InformationUsing 3Com Network Director Viewing IP Information using the Console Port Interface Management Command LineSSH Setting Up Command Line Interface Management usingInterface Setting Up WebChoosing a Browser Windows Red Hat Over the Network2000 Windows XP Server Setting Up Snmp Management V1 or User Default Access Level Name Password Default Users Setting UP for Management Problem Solving Indicated by LEDs Solving ProblemsSolving Hardware ProblemsUnit fails, no Snmp fan failure message is received Error message indicating that the SFP transceiver is faultyIP Addressing Solving Communication ProblemsHow do you obtain a registered IP Address? Problem Solving Upgrading Software File list similar to the following is displayed To back up the bootrom file on your Switch, enter To back up the application file on your Switch, enterIf the recycle-bin is empty the following is displayed Command Line Interface Switch Setup 4200G ping aaa.aaa.aaa.aaa Via network portTo download the web management file, enter Type y when promptedTo install the new application code, enter To install the new web management code, enterEnter y to display the following message Following information is displayedFollowed by a password prompt Bootrom InterfaceUpgrading from S3t03010024.zip 3comoscfg.def 3comoscfg.cfg s3t030100s56.app Enter your choice0-3 Select option 3 to display the following Select option 2 to display the followingUpgrading BootromUsing FTP Using TftpUsing XModem Ccccccccccccccccccccccccccccc Upgrading Software Safety Information This must be approved for the country where it is used Power Cord Set-Japan Important Safety InformationImportant Safety Information ’information de Sécurité Importante Schko Dispositif Laser De Classe Vorsicht Das Gerät muß geerdet sein Wichtige SicherheitsinformationenInformación de Seguridad Importante Schuko Importanti Informazioni di Sicurezza Stati Uniti e Ważne informacje o zabezpieczeniach Ważne informacje o zabezpieczeniach Ostrzeżenie Porty światłowodowe-bezpieczeństwo PIN-OUTS 10/100 and 1000BASE-T RJ-45 connections Ethernet Port RJ-45 Pin AssignmentsPin Number 10/100 1000 Ethernet Port RJ-45 Pin Assignments Appendix B PIN-OUTS Switch 4200G 12-Port Switch 4200G 24-Port Switch 4200G 48-Port Appendix C Technical Specifications Purchase ServicesRegister Your ProductDownloads Access SoftwareTroubleshoot OnlineContact Us Latin America Telephone Technical Support and Repair Country Telephone NumberUS and Canada Telephone Technical Support and Repair Numbers IndexSFP Regulatory Notices