3Com 4500 Getting Started Manual

Also see for Switch 4500 Family: Product guide Datasheet Datasheet Datasheet Datasheet

Contents

3Com 4500 Getting Started Manual Manual pdf 53 page image

Solving Hardware Problems 53Solving HardwareProblemsIn the rare event of your Switch unit experiencing a hardware failure, refer to thelist of suggested solutions below.A fan failure warning message is receivedYour Switch has a fan monitoring system that will generate fan failure warningmessages. Fan failure could potentially reduce the lifetime of the Switch. Themonitoring system polls the fan status at periodic intervals while the unit ispowered up.If one fan has failed in the Switch, a warning message will be generated in thefollowing 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 themanagement workstation.■ Command Line Interface — an indication of a general hardware failure isprovided through the Top level menu displayed when logging on to the CLI. Formore detailed information about the failure select the display logbuffercommand.■ Web interface — an indication of fan failure is provided through the DeviceSummary table for the specific unit. In addition all Summary tables turn red toindicate the fan failure.If a fan failure warning message is generated:1 Power off the unit.2 Check that the air vents are not obstructed.3 Power cycle the unit. To do this, remove and reconnect the AC mains supply. If theunit has no AC main supply, remove and reconnect the DC RPS supply.4 If another fan failure warning message is generated via the Command LineInterface or the Web interface, return the unit to 3Com.Unit fails, no SNMP fan failure message is received1 Power cycle the unit. To do this, remove and reconnect the AC mains supply. If theunit has no AC mains supply, remove and reconnect the DC RPS supply.2 Check the command line interface (display logbuffer command) todetermine whether a thermal shutdown has occurred.3 If no, return the unit:If yes, check that:■ The air vents are not obstructed.■ The ambient temperatures and environmental conditions meet those specifiedin Appendix E “Technical Specifications” on page 79.4 Power cycle the unit. If a further thermal shutdown occurs, and all environmentalconditions are satisfactory, return the unit to 3Com.