3Com DUA1770-0AAA04 manual Unit fails, no Snmp fan failure message is received

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56CHAPTER 4: PROBLEM SOLVING

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 the unit has no AC main supply, remove and reconnect the DC RPS supply.

4If another fan failure warning message is generated via the Command Line Interface or the Web interface, return the unit.

Unit fails, no SNMP fan failure message is received

1Power cycle the unit. To do this, remove and reconnect the AC mains supply. If the unit has no AC mains supply, remove and reconnect the DC RPS supply.

2Check the command line interface (system summary 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 Appendix C.

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

Error message indicating that the GBIC transceiver is invalid

The Switch has identified that the GBIC does not meet the minimum requirements for the Switch and has disabled the port. To correct this problem, completely remove the GBIC and replace it with a 3Com approved GBIC. See “Approved GBIC Transceivers”on page 29

Error message indicating that the GBIC transceiver is faulty

To correct this problem, completely remove the GBIC and then reinsert it. If the problem persists, contact 3Com Technical Support.

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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 Please include the following information when commenting SuperStack 3 Switch 4900 Series Getting Started Guide3Com 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 Front View Detail Switch 4900 front viewSwitch 4924 front view Ports cross-over Power/Self Test LED Color Indicates Port Status LEDsModule Status LEDs Unit LEDsSwitch Rear Switch 4900 rear viewPower Socket Switch 4924 rear viewSwitch units, it is returned to these defaults Default SettingsSupported by your Switch Installing the Switch Site Package ContentsChoosing a Suitable Flow through the side panels of the Switch Rack-mountingDesk, or attach it to a wall Have been fittedRepeat steps 2 and 3 for the other side of the Switch Fitting a bracket for rack-mountingInterconnecting two Switch 4900 units Power-up Powering-upSwitch SequencePower System output RJ-45 connector is now a grounded port That contain alignment pins can cause damage to your SwitchYour Switch OptionsSwitch 4950 Gbic OperationApproved Gbic TransceiversFiber SC connector Type 4 Gbic with internal Eeprom fitted Inserting a Gbic Transceiver into a SwitchSwitch 4950 Gbic Operation Installing the Switch Setting UP for Management Setting Up OverviewManual IP Configuration Automatic IP ConfigurationSetting UP for Management Manually Configuring IP Information Pre-requisitesSetting 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 Connecting a workstation to the Switch via the console port 19,200 baud Data bitsSetting 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 Command Line Network Using TelnetInterface Management CLI Management viaChoosing a Browser Setting Up WebInterface Over the Network Http//xxx.xxx.xxx.xxxPasswords Setting Up SnmpDefault Users User Default Name Password Access Level Security Device User Modify operation on the web interfaceProblem Solving For Technical Support information, see Appendix DSolving Problems Solutions belowPower LED does not light On powering-up, the Power/Self Test LED lights yellowProblems Solving HardwareFan failure warning message is received For further information about RMON, refer to StatusError message indicating that the Gbic transceiver is faulty Unit fails, no Snmp fan failure message is receivedSolving Communication Problems IP AddressingHow do you obtain a registered IP Address? Safety Information Important Safety Information This must be approved for the country where it is usedImportant Safety Information 3CGBIC91 Gbic SX 3CGBIC92 Gbic LX ’information de Sécurité Importante SchkoAppendix a Safety Information 3CGBIC91 Gbic SX 3CGBIC92 Gbic LX Wichtige Sicherheitsinformationen Der Netzstecker muß die Norm CEE 7/7 erfüllen SchukoWichtige Sicherheitsinformationen Appendix a Safety Information Pin to 9-pin PC-AT Serial CableNull Modem Cable 9-pin to RS-232 25-pin Connectors Modem CableRJ-45 Pin AssignmentsPin Number 10/100BASE-T 1000BASE-T Appendix B PIN-OUTS Physical Dimensions SafetyPower Consumption Same unless otherwise statedPower Supply Protocols Used for AdministrationHeat Dissipation Standards SupportedServices Online TechnicalUsername anonymous Asia, Pacific Rim From this region, emailEurope, Middle East and Africa From this region, enter the URLAsia, Pacific Rim Europe, Middle East and AfricaCountry Telephone Number Asia, Pacific Rim Country Telephone Number Latin America Index NumbersPasswords Regulatory Notices