[c-nsp] "sh run" crashes router

Paul Stewart paul at paulstewart.org
Mon Jun 8 17:40:37 EDT 2009


What are some of the versions you are running?  We have some 1710/1711
routers and many 2621 in the field and have never experienced that
particular issue..

Agree with eninja though - always IOS bug 95% of the time anyways...;)

Paul


-----Original Message-----
From: cisco-nsp-bounces at puck.nether.net
[mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of e ninja
Sent: June 8, 2009 5:02 PM
To: Richey
Cc: cisco-nsp at puck.nether.net
Subject: Re: [c-nsp] "sh run" crashes router

Segmentation Violations (SegV) exceptions are _always_  caused by a bug in
Cisco IOS and could be triggered by either of the following:

   - Accessing an invalid memory address e.g. attempting to access the
   lowest 16KB of memory on powerPC platforms
   - Writing to a read-only memory region
   - A jump to an invalid PC (often 0x0)

Contact your network maintenance service provider/Cisco to get your bug fix.

More info at...

   -
 
http://www.cisco.com/en/US/products/hw/routers/ps359/products_tech_note09186
a0080189ddb.shtml
   - http://solutions.mysolvr.com/Spurious_Memory_Accesses

eninja



On Mon, Jun 8, 2009 at 11:29 AM, Richey <mylists at battleop.com> wrote:

> I am setting up Tacacs+ on all of our far end routers so I can run rancid.
> I have found several 1720s and a 2621 that crash when I log in to them and
> issue the "sh run" command.   They reboot quickly and then I don't have a
> problem with the "sh run" command after the reload.   If I look at the
> output from a "sh ver" I get  System returned to ROM by error - a SegV
> exception, PC 0x8066A150.    This seems to only be a small number of
> routers.  They are in different environments (one is in a server room,
> another on the wall in a warehouse, etc)   The 1700s are running various
> versions of the same image type.    The only thing that they all have in
> common is that it's been months since anyone has logged into the router.
> Is this some bug that comes from long uptimes without any activity at the
> CLI?
>
>
>
> Richey
>
>
>
>
>
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