Information Required For Troubleshooting Pre-1 Modules - Cisco uBR10012 Troubleshooting Manual

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Troubleshooting PRE-1 Modules

This chapter describes how to troubleshoot Performance Routing Engine (PRE-1) modules. It provides

information on troubleshooting PRE-1 fault states, the management Ethernet port, and the serial port.

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Information Required for Troubleshooting PRE-1 Modules

The PRE-1 module is the primary processor for the Cisco uBR10012 router, and any problems with the

PRE-1 module affect all operations. If you suspect a problem with the PRE-1 module, please collect the

following information before proceeding further, to aid in troubleshooting the problem:

Capture all console logs and system messages.

Capture the output of the show tech-support command. Registered users on Cisco.com can decode the

Step 2

output of this command by using the Output Interpreter tool, which is at the following URL:

Capture the complete bootup sequence, especially if the router is reporting errors at bootup.

If the router is unresponsive, or if it refuses to boot to the Cisco IOS prompt, reboot the router to the

Step 4

ROMMON prompt and capture a stack trace, using the stack ROMMON command. For more

information on this procedure, see the Obtaining a Stack Trace from ROM Monitor section in the

Troubleshooting Router Hangs document, at the following URL:

http://www.cisco.com/en/US/products/hw/routers/ps359/products_tech_note09186a0080106fd7.shtml

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Information Required for Troubleshooting PRE-1 Modules, page 3-1

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Cisco uBR10012 Universal Broadband Router Troubleshooting Guide

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