[c-nsp] Cisco 6509 reboots on its own... again...

[Youssef Bengelloun-Zahr]

Hello,

Yes, as you're saying, same here. Only one of our two chassis was hit by
this, only a few inches away from one another.

Same hardware, same softwre, same configs and also same temp variations
(including the one mentioned before).

Yeah, odds can change pretty fast.

Still, if talking strictly about physics here, have you ever heard of metal
dilating at 26°C ?

I am more than ready to consider any options !

Thanks for making my days easier M. Cisco ;-)

Y.



2010/7/5 <j.vaningenschenau at utwente.nl>

> Hi,
>
> > ==> Are you implying that a slight temperature raise of 3 degrees was
> > enough
> > to provoque the dilation of the line cards inside the chassis ?!?
> >
> > Hmm.... Curious, I noticed a slight increase of our DC's temp between
> > last
> > saturday night and sunday morning for a few hours (approx 10h) :
> >
> > - the SUP' temp went from 22°C to 24°C
> >
> > - the chassis' temp went from 26°C to 28°C
> >
> > Hmm.... It's a possibility but the odds are fairly small compared to a
> > software bug, don't you think ?
>
> To chip in here: over the last 6 weeks we had two crashes on a Cat6k
> Sup720-3B. Device was stuck in rommon afterwards; "reset" followed by "boot"
> hung the box, so we had to resort to full power down / power up. Did a
> reseat of the sup after the first crash, but it crashed again within two
> weeks after that. About the same conditions as in your case: IOS SXI2a,
> "software fault", crashes happened while the temperature was changing a few
> degrees.
>
> So it's either:
> * a software bug that we didn't hit for several months and then two times
> in a short period of time (and only on one of our two parallel routers)
> * temperature-sensitive hardware issue
> * other hardware failure
>
> Does that change your perception of the odds? ;)
>
>
> Regards,
>
> Jeroen van Ingen
> ICT Service Centre
> University of Twente, P.O.Box 217, 7500 AE Enschede, The Netherlands
>



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