Cisco Systems manual Cisco XR 12406 Router Installation Guide

Chapter 4 Troubleshooting the Installation

Troubleshooting the Processor Subsystem

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. 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.

•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. Table 4-4 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.

–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.

–Turn the power switch for each PEM to the off position.

–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.

•Is a critical, major, or minor alarm LED on the alarm card on?

–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.

–There could be a false error indication originating from the RP

(Table 4-4). Try reseating the RP. If that does not work you must replace the RP.

	Cisco XR 12406 Router Installation Guide
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