Cisco XR 12406 User Manual
Page 146
Chapter 4 Troubleshooting the Installation
Troubleshooting the Processor Subsystem
4-16
Cisco XR 12406 Router Installation Guide
OL-13831-01
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What is occurring on the Ethernet interface.
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2 Ethernet port-selection LEDs (labeled PRIMARY) identify which of
the Ethernet connections are selected. Because both ports are supported
on the PRP, the LED on port ETH0 is always on. The LED on port ETH1
lights when it is selected.
Check the following to help isolate a problem with the RP:
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Are both alphanumeric LED displays on?
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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. If the RP is not powered up, its right
display may be on. If both displays are off, the RP may not be properly
seated in the backplane connector. There also might be a problem with
the MBus module on the RP, or the system power supply might be off.
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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.
lists messages that the RP alphanumeric LED can
display. If one of the messages appears frozen, the boot process could be
halted. Make a note of the message. Turn off the system power supply power
switches, then turn them back on to reset the system. This starts the boot
process again. If the system halts again, the RP could be faulty and might
need to be replaced.
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If the power modules and blower module 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 alarm card is faulty.
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Turn the power switch for each PEM to the off position.
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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 up the system by turning the PEM power
switches on.
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Is a critical, major, or minor alarm LED on the alarm card on?
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If any of the three alarm card alarm LED pairs is on, a fault has been
detected in the system. Check the console for messages indicating the
source of the problem.