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Rubens Kuhl Jr. wrote: > The error message is about the symptom, not the cause. > > There is an unfortunately usual condition with switches and > port-channels: unidirectional links causing layer 2 loops that bypass > spanning-tree controls. The balancing decision of each side may give > one direction a working path, and the other direction a bad path at > some moment (bad cable, bad port etc.) - ------------------------- we have stp features enabled to hopefully address loops along w/ UDLD for unidirectional links issues. regards, /virendra > > Putting UDLD (unidirectional link detection) in place can deal with > the issue by shutting down the path, but it won't solve the problem, > just contain it before the network flaps. > > Some C6509 modules have also cable diagnostic features, which may be > useful to find out the problem. > > > Rubens > > > > On 9/16/07, virendra rode // <[EMAIL PROTECTED]> wrote: > Hi, > > This has happened twice in a row when we configured port-channels on our > core switches (C6509). > We saw RP utilization jump to almost 90% and at one point it hit 100% > causing our network to flap. We are able to calm it down by shutting the > port-channel but we are still scratching our heads as to what could have > caused this spike. > > We've found this to be spurious and we were unable to track down what > was spiking the cpu. > > The error message decoder off CCO is stating that this message is > informational and that no action is required <head scratching>? > > > core-1# > > Sep 16 00:43: %CONST_DIAG-SP-6-HM_MESSAGE: High traffic/CPU util seen on > Module 6 [SP=16%,RP=86%,Traffic=0%] > > 6 2 Supervisor Engine 720 (Active) WS-SUP720-BASE > 6 000d.xxxx.xxxx to 000d.xxxx.xxxx 3.0 7.7(1) 12.2(17a)SX1 Ok > 6 Policy Feature Card 3 WS-F6K-PFC3A hw 2.0 Ok > > > core-1#sh ver | incl IOS > IOS (tm) s72033_rp Software (s72033_rp-PSV-M), Version 12.2(17a)SX1, EARLY > DEPLOYMENT RELEASE SOFTWARE (fc1) > > > > Any pointers will be appreciated. > > > regards, > /virendra _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/ >> -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.2.2 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQFG7pTJpbZvCIJx1bcRAgtCAKCOqLJll6zaScuY8GqCLKB6RDiizQCgp5YB H+R7HH/C5Dzg7AsSyLwKRkE= =SjTC -----END PGP SIGNATURE----- _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
