3Com 3CR16709-91, 3CR16708-91 manual Problem Solving

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4	PROBLEM SOLVING

This chapter helps you to diagnose and solve problems you may have with the operation of your Switch. There is also an explanation of IP addressing.

The topics covered are:

■Solving Problems Indicated by LEDs

■Solving Hardware Problems

■Solving Communication Problems

■Solving Software Upgrade Problems

■Recovering from a Lost Password

If you experience a problem that is not listed here, it may be included in the Support section of the Switch Management Interface Reference Guide on the CD-ROM that accompanies your Switch.

For Technical Support information, see Appendix D.

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Contents 3CR16708-91 3CR16709-91 United States Government Legend 3Com Corporation Campus Drive Marlborough, MA USAContents Setting UP for Management Outs Problem SolvingPage About this Guide Conventions Icon DescriptionConvention Description Related DocumentationDocumentation Pddtechpubscomments@3com.com CommentsIntroducing Hardware Features Switch Alert LED Power LED Port Status Leds PoE Status Leds Switch Front View DetailSFP Module Status LED Switch 9 FX only 100BASE-FX Port Status LEDs Switch 9 FX onlyColor Indicates 10BASE-T/100BASE-TX Port Status LEDs Alert LED LEDSwitch 9 rear view Switch Rear View DetailSwitch Rear View Detail Page Default Settings shows the default settings for the Switch Page Installing the Switch Package Contents Choosing a SuitableSite Air temperature around the Switch does not exceed 50 C 122 F Instructions for Cement Walls Wall-mountingUpwards MountingMake two holes 150 mm 5.9 in. apart Instructions for Wood WallsColor State Power and Alert LED colorsPower-up Sequence Cross-over Cable Straight-through Cable SFP Operation Installing the Switch Inserting a SFP Transceiver Installing the Switch Setting UP for Management Overview Setting UpConfigure IP information manually for your Switch or view Automatically configured IP informationAutomatic IP Configuration Manual IP ConfigurationSetting UP for Management Pre-requisites Manually Configuring IP InformationConnecting a workstation to the Switch via the console port Connecting the Workstation to the SwitchExample top-level command line interface menu Setting Up the Switch with IP InformationConfigured IP ViewingAutomatically Viewing Automatically Configured IP Information Viewing IP Information via the Console Port Methods of Managing a Switch Refer to Setting Up Web Interface Management on Refer to Setting Up Command Line Interface Management onCLI Management via Command LineNetwork Using Telnet Interface ManagementSetting Up Web InterfaceChoosing a Browser Management workstation Setting Up SnmpManagement Protocol Snmp can manage a Switch if Over the Network User Default Name Password Access Level Default UsersDefault Users and Passwords Setting UP for Management Problem Solving Indicated by LEDs Solving ProblemsProblems Refer to the list of suggested solutions belowSolving Hardware Solving Communication Problems IP AddressingHow do you obtain a registered IP Address? Solving Software Upgrade Problems Problem Solving Safety Information This must be approved for the country where it is used Power Cord Set Japan Important Safety InformationImportant Safety Information Schko ’information de Sécurité Importante’information de Sécurité Importante Vorsicht Europe Wichtige SicherheitsinformationenInformación de seguridad importante Schuko Dispositivo Láser DE Clase CSA Importanti Informazioni di SicurezzaAvvertenza porte a fibre ottiche Protezione degli occhi Appendix a Safety Information Panel. The pinout is shown below RJ-45 Pin Signal DB-9 Pin DirectionRJ-45 to RS-232 Adapter CablePin Number ConnectorsRJ-45 Pin AssignmentsOfficeConnect Managed Switch 9 and Switch 9 FX Protocols Used for Administration Standards SupportedTerminal Emulation Purchase ServicesRegister Your ProductDownloads Access SoftwareTroubleshoot OnlineContact Us Country Telephone Number Latin America Telephone Technical Support and RepairUS and Canada Telephone Technical Support and Repair Index Snmp Regulatory Notices

PROBLEM SOLVING