Supervisor Missing
One of the more frustrating troubleshooting events is when a
Supervisor disappears from the chassis. It is usually the standby Supervisor. To
fix the problem, you must have console access to the Catalyst switch. Typically,
a bad configuration is involved; for example, the boot variable field may have
an incorrect software filename. As a result, the Supervisor is in ROMMON mode.
To help mitigate boot issues, first do a dir
bootflash to see what Catalyst OS software is available on the box and
then select and boot the file using the boot
bootflash command.
A supervisor can also be forced into ROMMON mode if the
Catalyst OS image is corrupted. Two solutions can be implemented to fix this
problem:
-
Load the desired image on a PCMCIA card from a different switch
and then place the PCMCIA card on the bad supervisor. Next, attempt to boot the
image using the boot disk command.
-
Move the Supervisor to a working Catalyst switch and let it
synchronize with that switch's supervisor.
Software caveats in rare situations can also cause a Supervisor
to disappear from the chassis. A quick search through available Catalyst OS
caveats can help determine potential switching problems.
Like any other hardware product, sometimes the device breaks
down. A quick check of the light emitting diodes (LEDs) provides the status of
the module. If no LED lights, the Supervisor more than likely is faulty. Table 12-1 shows LED states and their
meaning.
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