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 [email protected] >https://puck.nether.net/mailman/listinfo/cisco-nsp >archive at http://puck.nether.net/pipermail/cisco-nsp/ Jens S Andersen Email: [email protected] Aalborg University Telf: 9940 9464 Selma Lagerlöfs Vej 300, 4.2.59 Fax: 9940 7593 9220 Aalborg Denmark _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
