3Com 3C17708-US - Switch 4050 Getting Started Manual

Contents

60 CHAPTER 4: P ROBLEM SOLVINGSolving 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 or more fans fail within the Switch, a warning message willbe generated 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.■ 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. The device mimic will alsodisplay red flashing fan icons.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 a fan failure warning message is generated:1 Power off the unit.2 Check that the air vents are not obstructed.DUA1770-9AAA05.book Page 60 Tuesday, September 9, 2003 2:01 PM