3Com 3C17700 - SuperStack 3 Switch 4900 Getting Started Manual

Also see for SuperStack 3 4900: Datasheet Getting started guide User guide Datasheet User guide

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3Com 3C17700 - SuperStack 3 Switch 4900 Getting Started Manual Manual pdf 55 page image

Solving Hardware Problems 55Solving 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.A fan failure warning message is receivedYour Switch has a fan monitoring system that will generate fan failurewarning messages. Fan failure could potentially reduce the lifetime of theSwitch. The monitoring system polls the fan status at periodic intervalswhile the unit is powered up.Should one fan failure occur in the Switch, a warning message will begenerated in the following ways:■ RMON Email Notification — If configured, you will receivenotification of the fan failure via email, SMS (Short Message Service),or pager.■ RMON Trap — If configured, an RMON trap is generated and sent tothe management workstation.For further information about RMON, refer to “Chapter 7: StatusMonitoring and Statistics” in the Switch Implementation Guide suppliedin PDF format on the CD-ROM that accompanies the Switch.If more than one fan fails in the Switch, a warning message will begenerated by RMON Email Notification, RMON Trap and also in thefollowing ways:■ Command Line Interface — An indication of a general hardwarefailure is provided through the Top level menu displayed when loggingon to the CLI. For more detailed information about the failure selectthe system summary command.■ Web interface — An indication of fan failure is provided through theDevice Summary table for the specific unit. In addition all Summarytables turn red to indicate the fan failure.