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

Youssef Bengelloun-Zahr youssef at 720.fr
Mon Jul 26 12:17:05 EDT 2010


Okay,

Thanks for the heads up on this one !

Y.



Le 26 juil. 2010 à 08:57, krunal shah <krun.shah at gmail.com> a écrit :

> 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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