3Com DUA1770-0AAA04 manual Problem Solving, For Technical Support information, see Appendix D

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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 Superstack 3 Switch Management Interface Reference Guide on the CD-ROM that accompanies your Switch.

To ensure this product provides optimum performance, high speed fans are used to provide ventilation. These fans have a high audible output.

For Technical Support information, see Appendix D.

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Contents SuperStack 3Com Corporation 5400 Bayfront Plaza Santa Clara, California Contents Setting UP for Management PIN-OUTS Page About this Guide Convention Description ConventionsIcon Description Documentation documentation RelatedDocumentation SuperStack 3 Switch 4900 Series Getting Started Guide Please include the following information when commenting3Com recommends that you copy the Docs/referenceguide Directory as a whole to maintain the structure of the filesIntroducing Introducing the Superstack 3 Switch 4900 Series Hardware Features Switches Switch 4900 front view Switch Front View DetailSwitch 4924 front view Ports cross-over Color Indicates Port Status LEDs Power/Self Test LEDModule Status LEDs Unit LEDsSwitch 4900 rear view Switch RearSwitch 4924 rear view Power SocketSwitch units, it is returned to these defaults Default SettingsSupported by your Switch Installing the Switch Site Package ContentsChoosing a Suitable Rack-mounting Flow through the side panels of the SwitchDesk, or attach it to a wall Have been fittedFitting a bracket for rack-mounting Repeat steps 2 and 3 for the other side of the SwitchInterconnecting two Switch 4900 units Powering-up Power-upSwitch SequencePower System output That contain alignment pins can cause damage to your Switch RJ-45 connector is now a grounded portYour Switch OptionsOperation Switch 4950 GbicApproved Gbic TransceiversInserting a Gbic Transceiver into a Switch Fiber SC connector Type 4 Gbic with internal Eeprom fittedSwitch 4950 Gbic Operation 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 SwitchConfiguring the Workstation with IP Information Using Command Line Interface via Telnet Example top-level command line interface menu 19,200 baud Data bits Connecting a workstation to the Switch via the console portSetting Up the Switch with IP Information Automatically Configured IPViewing Pre-requisites Viewing IP Information via the Console Port Example top-level command line interface menu Refer to Setting Up Command Line Interface Management on Network Using Telnet Command LineInterface Management CLI Management viaChoosing a Browser Setting Up WebInterface Http//xxx.xxx.xxx.xxx Over the NetworkPasswords Setting Up SnmpDefault Users Security Device User Modify operation on the web interface User Default Name Password Access LevelFor Technical Support information, see Appendix D Problem SolvingSolutions below Solving ProblemsPower LED does not light On powering-up, the Power/Self Test LED lights yellowSolving Hardware ProblemsFan failure warning message is received For further information about RMON, refer to StatusUnit fails, no Snmp fan failure message is received Error message indicating that the Gbic transceiver is faultyIP Addressing Solving Communication ProblemsHow do you obtain a registered IP Address? Safety Information This must be approved for the country where it is used Important Safety InformationImportant Safety Information 3CGBIC91 Gbic SX 3CGBIC92 Gbic LX Schko ’information de Sécurité ImportanteAppendix a Safety Information 3CGBIC91 Gbic SX 3CGBIC92 Gbic LX Der Netzstecker muß die Norm CEE 7/7 erfüllen Schuko Wichtige SicherheitsinformationenWichtige Sicherheitsinformationen Appendix a Safety Information Pin to 9-pin PC-AT Serial CableNull Modem Cable 9-pin to RS-232 25-pin Modem Cable ConnectorsRJ-45 Pin AssignmentsPin Number 10/100BASE-T 1000BASE-T Appendix B PIN-OUTS Safety Physical DimensionsPower Consumption Same unless otherwise statedProtocols Used for Administration Power SupplyHeat Dissipation Standards SupportedOnline Technical ServicesUsername anonymous From this region, email Asia, Pacific RimEurope, Middle East and Africa From this region, enter the URLEurope, Middle East and Africa Asia, Pacific RimCountry Telephone Number Asia, Pacific Rim Country Telephone Number Latin America Numbers IndexPasswords Regulatory Notices