3Com 3CR17451-91, 3CR17450-91 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

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 SuperStack 3 Switch 3870 Family Getting Started Guide United States Government Legend 3Com Corporation Campus Drive Marlborough MA USAContents Setting UP for Management PIN-OUTS Page About this Guide Convention Description ConventionsIcon Description Documentation documentation RelatedDocumentation Comments To access the online documentation from the CD-ROM3870 SwitchHardware Features Switch Front View Detail Switch1000BASE-T Ports Stack Master LED Color Indicates Port Status/Packet LEDsStacking Status LED Unit LED Power/Self Test LEDFault LED Color Indicates Module LEDsView Detail Port Speed Feature Switch Port StatusDuplex Mode Type of Unit Total Units in the Stack Maximum Modules PortDefault Settings Introducing the Superstack 3 Switch Installing the Switch Site Package ContentsChoosing a Suitable Rack-mounting Power lines and fluorescent lighting fixturesTo rack-mount your Switch Switch, as shown in FigureFitting a bracket for rack-mounting Repeat steps 2 and 3 for the other side of the SwitchSequence Power-upPowered-up and ready for operation SwitchCross-over Cable Straight-through Cable Power System outputSFP Operation Remove the plastic protective cover if fitted Removing an SFP Your SwitchTransceiver Installing the Switch Setting UP for Management Overview Setting UpAutomatic IP Configuration Manual IP ConfigurationSetting UP for Management Pre-requisites Manually Configuring IP InformationSetting Up the Switch with IP Information Connecting the Workstation to the SwitchExample top-level command line interface menu Automatically Configured IPViewing Viewing Automatically Configured IP Information Viewing IP Information via the Console Port Refer to Setting Up Command Line Interface Management on Management Command LineInterface Management Web InterfaceWhere xxx.xxx.xxx.xxx is the IP address of the Switch Network Using TelnetOver the Network Setting Up WebInterface Choosing a BrowserPasswords Setting Up SnmpDefault Users Security Device User Modify operation on the web interface User Default Access Level Name PasswordProblem Solving Indicated by LEDs Solving ProblemsPower/Self Test LED does not light On powering-up, the Power/Self Test LED remains yellowPort Status LED is flashing green/yellow ProblemsRefer to the list of suggested solutions below Solving HardwareUnit fails or Snmp thermal shutdown trap is received Fan failure warning message is receivedIP Addressing Solving Communication ProblemsError message indicating that the SFP transceiver is faulty How 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 Class ’information de Sécurité Importante’information de Sécurité Importante Dispositif Laser De Classe Vorsicht Europe Wichtige SicherheitsinformationenLaser Gerät der Klasse Información de seguridad importanteSchuko Appendix a Safety Information CSA Importanti Informazioni di SicurezzaSolo Regno Ważne informacje o zabezpieczeniach Appendix a Safety Information Laser Produkt Klasa Appendix a Safety Information RJ-45 to 9-pin PC-AT Serial CableNull Modem Cable RJ-45 to RS-232 25-pin Pin Number 10/100 1000 Modem CableRJ-45 Pin Assignments RJ-45 to RS-232 25-pinPin Number 10/100 1000 Appendix B PIN-OUTS Switch 3870 24 Port Switch 3870 48 Port Purchase Product to Gain Service BenefitsServices Register YourTelephone Technical Access SoftwareDownloads Contact UsAustralia 800 678 Philippines US and Canada Telephone Technical Support and Repair Index SFP Page Chapter Index Regulatory Notices

PROBLEM SOLVING