3Com 4210 26-PORT, 4210 PWR 18-PORT, 4210 9-PORT, 4210 PWR 26-PORT manual Solving Hardware, Problems

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Solving Hardware Problems

53

Solving Hardware	In the rare event of your switch unit experiencing a hardware failure, refer to the
Problems	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.

If a fan failure warning message is generated:

1Power off the unit.

2Check that the air vents are not obstructed.

3Power cycle the unit. To do this, remove and reconnect the AC mains supply. If another fan failure warning message is generated using the Command Line Interface or the Web interface, return the unit to 3Com.

Unit fails, no SNMP fan failure message is received

1Power cycle the unit. To do this, remove and reconnect the AC mains supply.

2Check the command line interface (display logbuffer command) to determine whether a thermal shutdown has occurred.

3If no, return the unit: If yes, check that:

■The air vents are not obstructed.

■The ambient temperatures and environmental conditions meet those specified in “Technical Specifications” on page 73.

4Power cycle the unit. If a further thermal shutdown occurs, and all environmental conditions are satisfactory, return the unit to 3Com.

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Contents 3Com Switch 4210 Family United States Government Legend 3Com Corporation Campus Drive Marlborough, MA USAContents Regulatory Notices Obtaining Support for Your 3COM ProductsAbout this Guide Related Documentation Description of their features Wire-speed Layer 2 switchingProduct Introduction OverviewSwitch 4210 9-port PWR Front panel Introduction to Switch 4210 Family PWR SwitchesRear panel Power systemSide panel Cooling systemFront panel of a Switch 4210 18-port PWR Shows the front panel of the Switch 4210 26-port PWR model DC input-Rated voltage range -52 VDC to -56 VDC Switch 4210 26-port PWR units support AC input or DC inputAC input Front Panel LEDs Power LED10/100BASE-TX Autosensing Ethernet Port Status LED Mbps Uplink Port Status LEDThis section describes each Switch 4210 Family model Introduction to the Switch 4210 Family Non-PWR ModelsSwitch 4210 9-port Front panel Panel StatusSwitch 4210 18-port Front panel Switch 4210 cools off naturallySwitch 4210 18-port model’s rear panel Switch 4210 26-port Front panelSwitch 4210 26-port rear panel Switch 4210 52-port Front PanelDescribes the Speed LED on the 10/100Base-TX port Port LEDDescribes the 10/100Base-TX autosensing port’s Link/Act LED Switch Model Port PWR Technical SpecificationsTechnical specifications for the Switch Earthing Lead Technical specifications for the Switch 4210 PWR modelsSFP modules supported by the Switch SwitchSFP Modules Supported forProduct Introduction Installing the Switch Installing the Switch Mount the front bracket to the device Screw Front Installing the switch in a 19-inch rackInstallation completed Sequence Power-upReady for operation 4210Redundant Power Supply Connecting a52 for a list of suggested solutions PWR LED ColorsSystem Switch 4210 Circuit Breaker and Cable Ratings Power AvailabilityRectifiers No Rectifier Redundancy +1 RectifierRPS Connection to the Switch Using Power over EthernetRJ-45 Signal Direction DB9 console ConnectingConsole Cable Terminal, as shown in FigureGND RXD DSR CTS Installing the Switch Managing Your Switch System View Methods of Managing a SwitchUser View Refer to Setting Up Snmp Management on Setting Up YourConfigured IP information Need toSnmp Configuring IP ManuallyAutomatically Configuring the IP Address using Dhcp Viewing Configured IPAutomatically InformationUser View Login Connecting to Console Port Manually Configuring IP InformationYou can manually configure the switch IP information by Connecting the Workstation to the SwitchOnce you have logged in you are automatically in User View Setting Up the Switch with IP InformationPrerequisites Using the Web Interface Enter the system-viewcommand and Enter Using Command Line Interface using TelnetManagement Where xxx.xxx.xxx.xxx is the IP address of the switchConsole Port Connection Network TelnetManagement using Setting Up CommandSetting Up Web Line InterfaceString is private Setting Up SnmpNew community string up to 32 characters String to be removedPasswords Default UsersDefault Users User Default Name Password Access LevelProblem Solving Indicated by LEDs Solving ProblemsSolving Hardware ProblemsError message indicating that the SFP transceiver is faulty Solving Communication ProblemsIP Addressing How do you obtain a registered IP Address?Solving Fabric Formation ProblemsProblem Solving Null Modem Cable PIN-OUTSPC-AT Serial Cable RJ-45 to RS-232 25-pinPin assignments Ethernet Port RJ-45 Pin Assignments10/100 and 1000BASE-T RJ-45 connections Obtaining Support for Your 3COM Products Contact Us Available for purchase from your 3Com resellerTelephone Technical Support and RepairCountry Telephone Number US and Canada Telephone Technical Support and Repair Latin America Telephone Technical Support and Repair3Com Network 3COM Network ManagementSupervisor DirectorAppendix C 3COM Network Management Management Suite 3Com EnterpriseIntegration Kit with HP OpenViewAppendix C 3COM Network Management Important Safety Information Safety InformationWichtige Sicherheitsinformationen ’information de Sécurité ImportanteInformación de Seguridad Importante Appendix D Redundant Power Supply Safety Information Importanti Informazioni di Sicurezza Ważne informacje o zabezpieczeniachAppendix D Redundant Power Supply Safety Information Regulatory Notices How to identify and resolve radio-TV interference problemsAppendix D Redundant Power Supply Safety Information