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How to determine the type of router crash

Core Issue

A system crash is when the system detects an unrecoverable error and restarts itself. A crash can be caused by software problems, hardware problems, or both. This section deals with hardware-caused crashes and software-related crashes, but may be mistaken for hardware problems. 

Note: Important information about the crash is lost if the router is reloaded after the crash, such as from the power-cycle or issuing the reload command. Collect the information found in the show tech-support and show log command output, as well as the crashinfo file before reloading the router.

Resolution

To address a router crash, perform these steps:

  1. Find out the type of crash by issuing a show version command.
  2. Look for the reason the system restarted.

This sample output shows where to look for the reason the system restarted:

Router#show version 
Cisco Internetwork Operating System Software
IOS (tm) RSP Software (RSP-PV-M), Version 12.0(10.6)ST, EARLY DEPLOYMENT
MAINTENANCE INTERIM SOFTWARE
Copyright (c) 1986-2000 by cisco Systems, Inc.
Compiled Fri 23-Jun-00 16:02 by richv
Image text-base: 0x60010908, data-base: 0x60D96000

ROM: System Bootstrap, Version 12.0(19990806:174725), DEVELOPMENT SOFTWARE
BOOTFLASH: RSP Software (RSP-BOOT-M), Version 12.0(9)S, EARLY DEPLOYMENT
RELEASE SOFTWARE (fc1)

Router uptime is 20 hours, 56 minutes
System returned to ROM by error - a Software forced crash, PC 0x60287EE8
System image file is "slot0:rsp-pv-mz.120-10.6.ST"
!--- The rest of the output has been omitted.

For more information regarding crashes, refer to Troubleshooting Router Crashes.

For more information regarding hardware troubleshooting, refer to Hardware Troubleshooting Index Page.

Version history
Revision #:
1 of 1
Last update:
‎06-22-2009 05:06 PM
Updated by: