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5-12 Cisco 12012 Gigabit Switch Router Installation and Configuration Guide
Troubleshooting the Processor Subsystem
•
Is a critical, major, or minor alarm LED on the alarm card on?
— If any of the three alarm card LEDs is on, a fault has been detected in the system.
Check the console for messages indicating the source of the problem.
— There could be a false error indication originating from the RP. You might want to
reseat or replace the RP.
Caution
The RP reset switch resets the RP and the entire system. To prevent system errors
and problems, use it only at the direction of a Cisco-certified service representative.
Troubleshooting the Line Cards
Line cards can be installed in slots 0 through 11 in the upper card cage. As each line card
powers up, a power-on self-test (POST) is performed on the line card memory. A full set of
field diagnostics can also be run on a line card from the system console providing a pass/fail
message both in the line card alphanumeric LED display and on the system console. (For
information on diagnostic testing, refer to the chapter “Running Diagnostics on the
Cisco 12012.”)
Check the following to help isolate a problem with the line cards:
•
Are both the alphanumeric LED displays on?
— The two displays are powered separately. The top display receives power from the
DC-DC converter on the line card. The bottom display is powered directly from the
power supply. So, even if the line card has not powered up, the bottom display could
be on. If both displays are off, the line card might not be fully plugged into the
backplane connector, there might be a problem with the MBus module on the line
card, or the system power supply may be off.
— If both displays are on, check the message being displayed. As soon as the DC-DC
converter is turned on by the MBus module, the processor on the line card begins
the boot process. Status messages are displayed in the alphanumeric displays as the
boot process continues on the line card.
Summary of Contents for Gigabit Switch Router Cisco 12012
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