[c-nsp] Possible memory corruption w/ 12.2(18)S11

[Greg Boehnlein]

On Tue, 21 Mar 2006, David Coulson wrote:

> 12.2(18)S11 on 7507 w/ RSP4.
> 
> We've been seeing this frequently (IP address of source varies)
> 
> Mar 19 07:31:09 core1.clevoh.n2net.net 515: Mar 19 07:31:01:
> %OSPF-4-ERRRCV: Received invalid packet: Bad Checksum from
> 207.166.192.208, GigabitEthernet4/0/0.100
> 
> If I do a 'memory cache-policy io uncached', it solves the problem,
> however it kills the CPU on the router.
> 
> Is this potentially a hardware issue, or an IOS bug? We've moved the
> interface to a seperate GEIP (different GEIP, GBIC, fiber, GBIC, switch)
> and we get the same problem. We never encountered this on PA-FE or FEIPs.
> 
> Does anyone have any suggestions for troubleshooting this, before I just
> go and load 12.2 on to it?

As a side note, this has been tested and replicated on a pair of 7507s 
running Dual RSP-4s w/ the same IOS version. That's two completely 
independent routers w/ completely different hardware...

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