[c-nsp] Troubleshooting bus error

[Rodney Dunn]

99.99% of the time crashes are always software especially bus error
crashes.

If the PC is 0x0 in the 'sh ver' most likely it's some form of stack
corruption and when you jumped to 0x0 it crashed.

A PC of a value in the test segment is normal depending on what the
address it's trying to access is.

I'd put my money on software.

Rodney

On Tue, Jan 24, 2006 at 11:21:09AM -0700, Josh Higham wrote:
> I had a router drop on me several times last night due to a bus error.
> One crash was at 0x0, the other at 0x606A04C8 (corresponds to
> main:text).  This is a 7206 (non-VXR) with minimal load that has been
> running well.
> 
> My guess is hardware, but I've never actually had a hardware error on a
> Cisco product so I need some help with diagnosis before I spend a bunch
> of money.
> 
> Is memory replacement likely to fix the problem, or might I need to
> replace the NPE as well?  The router has been in place for several
> years; would it still be worthwhile to reseat the memory?
> 
> Is it possibly a chassis problem?
> 
> The router is running very old software, so an upgrade is in order, but
> if hardware is at fault I don't want to make a bunch of changes while
> trying to resolve the root problem.  I'd rather do a hardware upgrade
> and let it run for a few weeks before doing anything else.
> 
> Thanks,
> Josh
> 
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