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

[Jens S Andersen]

This may well be true. Not long ago I had another very busy 6500 not being able 
to respond to UDLD packets with the result that some of its neighbors
errordisabled the links.

-Jens

>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
>>
>>
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>>
>> 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
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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