Cisco Support Community
Showing results for 
Search instead for 
Did you mean: 

Welcome to Cisco Support Community. We would love to have your feedback.

For an introduction to the new site, click here. If you'd prefer to explore, try our test area to get started. And see here for current known issues.

New Member

What is a bus error?

My router died this weekend and when it came back up I received this message: System returned to ROM by bus error at PC 0x400BB448, address 0xB0D0A

:22 UTC Sun Oct 22 2006

System image file is "flash:c2800nm-advipservicesk9-mz.124-7.bin". Can anyone shed any light on this for me?


Hall of Fame Super Red

Re: What is a bus error?

Hi Lance,

Perhaps this wii help;

Bus Error Crashes

The system encounters a bus error when the processor tries to access a memory location that either does not exist (a software error) or does not respond properly (a hardware problem). A bus error can be identified through the output of the show version command provided by the router (if not power-cycled or manually reloaded).

These are two examples of bus error crashes:

Router uptime is 2 days, 21 hours, 30 minutes

System restarted by bus error at PC 0x30EE546, address 0xBB4C4

System image file is "flash:igs-j-l.111-24.bin", booted via flash

.........At the console prompt, this error message might also be seen during a bus error:

*** System received a Bus Error exception ***

signal= 0xa, code= 0x8, context= 0x608c3a50

PC = 0x60368518, Cause = 0x20, Status Reg = 0x34008002

From this doc;

Troubleshooting Bus Error Crashes

Hope this helps!