[c-nsp] Sup 720 - a very high number SP - RP crash

[krunal shah]

I got a case opened for one of our issue and TAC provided following bug

*********************************************************************
CSCso87348- Corruption in subflow code

Symptoms:
A Catalyst 6500, Cisco 7600 or Cisco 7200 router may reload unexpectedly.
 Additionally, this single ddts can affect T train platforms on limited
releases as detailed below.

Conditions:
Occurs when NetFlow is configured.

Workaround:
Disable NetFlow. This is done with the following commands:

no ip flow ingress
no ip flow egress
no ip route-cache flow

Enter the appropriate command for each subinterface for which NetFlow is
currently configured.

Other Notes:
12.4(23) is affected by this ddts.  The fix is in releases thereafter for
12.4.

The 12.2SRC and 12.2SXH code trains are affected.  The specific versions
affected are 12.2(33)SXH, 12.2(33)SXH1, 12.2(33)SXH2, 12.2(33)SXH2a,
12.2(33)SRC, and 12.2(33)SRC1
*********************************************************************
The issue is fixed in the two affected code trains from the 12.2SXH3 and
12.2SRC2 releases onwards.

Krunal


On Sat, Jul 24, 2010 at 2:47 PM, Youssef Bengelloun-Zahr <youssef at 720.fr>wrote:

> Hello,
>
> That's fully beause I had the exact problem recently, late may / beginning
> of june. I even posted a thread about it here.
>
> One of my boxes (6k5 with 2 sup720-3bxl) running 12.2(33)SXH2a rebooted on
> it's own.
>
> Load average of the box was around 8-10% at the crash time.
>
> Crashfile showed a small number of errors on the EOBC. Funny because the
> EOBC is supposed to avoid this kind of things AFAIK !?!
>
> I'm interested in any feedbacks on this one.
>
> Thanks.
>
> Regards.
>
> Y.
>
>
>
> Le 23 juil. 2010 à 09:01, krunal shah <krun.shah at gmail.com> a écrit :
>
> > IOS is normally 12.2(33) SXHxx and SXIxx series.
> >
> >
> > Not sure about the CPU load at the time of switch crash but looks like
> EOBC
> > channel reamins full from traffic. I dnt know if CoPP solves this
> problem.
> >
> >
> > Krunal
> >
> >
> > On Fri, Jul 23, 2010 at 9:38 AM, Phil Mayers <p.mayers at imperial.ac.uk
> >wrote:
> >
> >> On 23/07/10 14:25, krunal shah wrote:
> >>
> >>> hi,
> >>>
> >>> I have been seeing a very high number of supervisor 720 (WS-SUP720)
> >>> crashes
> >>> in many customer's environment. Bassically the SP stops receiving the
> >>> heart
> >>> beats from RP.
> >>>
> >>
> >> Which IOS version?
> >>
> >> What does the CPU load look like on the box?
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