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.)
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: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > 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 > -----BEGIN PGP SIGNATURE----- > Version: GnuPG v1.4.2.2 (GNU/Linux) > Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org > > iD8DBQFG7X+IpbZvCIJx1bcRAlC7AKDKbHu9WY9DrFG25Mk0f61o6WykjQCgnbOX > kNYOtzqXSZWCQRkyEW6TU54= > =H9v0 > -----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/ > _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
