Cisco XR 12404 User Manual
Page 116
Chapter 4 Troubleshooting the Installation
Troubleshooting the Processor Subsystem
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Cisco XR 12404 Router Installation Guide
OL-13830-02
Check the following to help isolate a problem with the RP.
•
Are both alphanumeric LED displays on?
–
The two displays are powered separately. The left display receives power
from the DC-DC converter on the RP. The right display is powered
directly from the power supply; therefore, even if the RP has not powered
up, its right display could be on. If both displays are off, the RP may not
be properly seated in the backplane connector, there might be a problem
with the MBus module on the RP, or the system power supply might 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 RP
begins the boot process. Status messages are displayed as the boot process
continues. If one of the messages appears frozen, the boot process could be
halted. Write the message being displayed on a piece of paper. Turn off the
PEM power switches, then turn them back on to reset the system and start the
boot process again. If the system halts again, the RP could be faulty and may
need to be replaced.
–
If the PEMs and fans appear operational but none of the RP LEDs or
displays are on, suspect that the RP has not been properly installed or that
the +5 VDC output from the CSF card is faulty.
–
Turn the PEM power switch to the OFF position on each PEM.
–
Loosen the two captive screws on the left and right sides of the
RP faceplate, and use the ejector levers to eject and reseat the RP. Tighten
the captive screws, then power on the system by turning the PEM power
switches on.
•
Is a Critical, Major, or Minor alarm LED on the CSF card on?
–
If any of the three CSF 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 may
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.
todd.book Page 18 Monday, March 16, 2009 2:47 PM