I have the same CPU problem but on a 3750. How would I add a similar rate-limit for our ghost traffic? That command does not work on 12.2(52)SE.
Thank you, Christina > Message: 9 > Date: Wed, 13 Jul 2011 13:59:28 +0100 > From: Alexander Clouter <a...@digriz.org.uk> > To: cisco-nsp@puck.nether.net > Subject: Re: [c-nsp] Cat4500 High CPU with Multicast Stream > Message-ID: <geh0f8-ujm....@chipmunk.wormnet.eu> > > Antonio Soares <amsoa...@netcabo.pt> wrote: >> >> I have a customer with a few 3560/3750's and one 4500/SUP5 acting as the >> core switch. >> >> For some reason, when a user start one multicast stream, the 4500 suffers >> high cpu utilization and the network is affected. Only the 4500 suffers of >> this problem, the 3560/3750's don't have any complaints. >> >> I see that the 4500 is a CEF based platform and I know that IP Multicast is >> not supported in the CEF path. So I was expecting to have this traffic >> switched in hardware or fast-switched. But a packet capture shows me that >> the traffic goes to the cpu. I used this debug and output to confirm this: >> >> debug platform packet all receive buffer >> >> show platform cpu packet buffered >> >> The processes that eat most of the cpu are "Cat4k Mgmt LoPri" and "Cat4k >> Mgmt HiPri". We thought this could be a bug and we upgraded the 4500 to the >> latest release but the problem is exactly the same. The multicast stream is >> processed by the cpu. >> >> Anyone has seen this before ? Is this normal behavior of the 4500 ? >> >> Usually the multicast streams are destined to 224.x.x.x. The end users do >> not respect the 239 rule. >> >> > Sounds like the following might help: > > http://www.gossamer-threads.com/lists/cisco/nsp/128799?do=post_view_threaded > > It's the following lines you might need: > ---- > mls rate-limit multicast ipv4 non-rpf 100 10 > mls rate-limit multicast ipv4 partial 250 100 > ---- > > Or something similar to them. > > Cheers > > -- > Alexander Clouter > .sigmonster says: I'm not tense, just terribly, terribly alert! > _______________________________________________ cisco-nsp mailing list cisco-nsp@puck.nether.net https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/