3Com 3C17203 Getting Started Manual

Also see for 3C17203 - SuperStack 3 Switch 4400: Datasheet Getting started guide Getting started guide Implementation guide Getting started guide

Contents

3Com 3C17203 Getting Started Manual Manual pdf 49 page image

Solving Hardware Problems 49The Unit LED is flashing greenThe Switch unit physically forms a stack with other Switch 4400 units, butcannot be managed as part of that stack because one or more units havenot been upgraded to software version 2.0 or later. You must upgradeeach unit in the stack to this software version, which is available on theCD-ROM that accompanies your Switch.Solving HardwareProblemsIn the rare event of your Switch unit experiencing a hardware failure,refer to the list of suggested solutions below.An expansion module is installed and the unit will not power upEnsure that the expansion module is fully seated in the slot and theconnectors are engaged so that the securing screws can be tightened.An SNMP fan fail trap is received1 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 mainssupply. If the unit has no AC main supply, remove and reconnect the DCRPS supply.4 If a further fan fail trap is received, return the unit.Unit fails, no SNMP fan fail trap is received1 Power cycle the unit. To do this, remove and reconnect the AC mainssupply. If the unit has no AC mains supply, remove and reconnect the DCRPS supply.2 Check the command line interface (system summary 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 thosespecified in Appendix C.4 Power cycle the unit. If a further thermal shutdown occurs, and allenvironmental conditions are satisfactory, return the unit to 3Com.DUA1720-3AAA03_online.book Page 49 Monday, March 25, 2002 10:48 AM