[c-nsp] Anyone running s3223-advipservicesk9_wan-mz.122-33.SXI4a?

[Heath Jones]

Just a quick thought - if some other process is chewing the cpu to the point
where it stops normal stp behaviour, might that be causing the loop?
In other words, perhaps loops are the effect, not the cause?



On 2 September 2010 07:04, Jens S Andersen <jsa at aua.auc.dk> wrote:

> Hi Peter
>
> The router is doing layer2 and 3. (OSPF, HSRP, PVST)
> The router is totally unresponsive, even after the loop is broken (by
> shutting
> an interface on the neighbour-router).
> Power off helps.....
>
> Logging on to the other routers is difficult/impossible because they are
> overloaded. Would a scheuler allocate make any difference here?
>
> All I can see in the logfiles is host/address-flapping and storm-control
> kicking
> in.
>
> Jens
>
> >On Wed, 2010-09-01 at 16:26 +0200, Jens S Andersen wrote:
> >> 2 weeks ago i upgraded my WS-C6503-E/WS-SUP32-GE-3B to ios
> >> advipservicesk9_wan-mz.122-33.SXI4a.
> >>
> >> Since then I've seen 2 cases of layer 2 loop. This switch/router forms
> >> a layer 2 "ring" with 3 other switch/routers (for redundancy). This
> >> has ben working for years without problems.
> >>
> >> Has anyone experienced stability-problems with this IOS version?
>
> >Plain L2 switching with switchports? Or something more exotic?
>
> >What do the switches themselves say about it? Have you tried STP
> >debugging or been able to observe the problem while it happens?
>
> >I guess everybody's seen loops of some kind, but most times there's an
> >explanation.
>
> >--
> >Peter
>
>
> >_______________________________________________
> >cisco-nsp mailing list  cisco-nsp at puck.nether.net
> >https://puck.nether.net/mailman/listinfo/cisco-nsp
> >archive at http://puck.nether.net/pipermail/cisco-nsp/
>
>
> Jens S Andersen                 Email:  jsa at adm.aau.dk
> Aalborg University              Telf:   9940 9464
> Selma Lagerlöfs Vej 300, 4.2.59 Fax:    9940 7593
> 9220 Aalborg
> Denmark
> _______________________________________________
>  cisco-nsp mailing list  cisco-nsp at puck.nether.net
> https://puck.nether.net/mailman/listinfo/cisco-nsp
> archive at http://puck.nether.net/pipermail/cisco-nsp/
>