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Solving Hardware Problems 47
A link is connected and yet the Port Status LED for the port does
not light
Check that:
■ The Switch and the device at the other end of the link (or cable) are
connected securely.
■ The devices at both ends of the link are powered-up
■ The quality of cable is satisfactory
■ Auto-negotiation settings are the same at both ends.
Auto-negotiation problems will occur with 10BASE-T, 100BASE-TX or
1000BASE-T where auto-negotiation is disabled and incorrect cables
are being used (cross-over or straight).
Solving Hardware
Problems
In the rare event of your Switch unit experiencing a hardware failure,
refer to the list of suggested solutions below.
A fan failure warning message is received
Your Switch has a fan monitoring system that will generate fan failure
warning messages. Fan failure could potentially reduce the lifetime of the
Switch. The monitoring system polls the fan status at periodic intervals
while the unit is powered up.
Should one or more fans fail within the Switch, a warning message will
be generated in the following ways:
■ RMON Trap — if configured, an RMON trap is generated and sent to
the management workstation.
■ Command Line Interface — an indication of a general hardware
failure is provided through the Top level menu displayed when logging
on to the CLI. For more detailed information about the failure select
the system summary command.
■ Web Interface — an indication of fan failure is provided through the
Device Summary table for the specific unit. In addition all Summary
tables turn red to indicate the fan failure. The device mimic will also
display red flashing fan icons.
For further information about RMON, refer to “Chapter 7: Status
Monitoring and Statistics” in the Switch Implementation Guide supplied
in PDF format on the CD-ROM that accompanies the Switch.
dua1740-0aaa03.book Page 47 Thursday, December 23, 2004 9:23 PM