Sorry. I also meant to say it's a Sup 720-3BXL. Based on what I can see on CCO, that thing can forward 400 Mpps of ipv4 traffic. Does that mean that I can set a rate limit of, say, 300 Mpps and somewhat guard the CPU from meltdown for a few moments?
On Tue, Sep 21, 2010 at 2:52 PM, John Neiberger <jneiber...@gmail.com> wrote: > Are you all referring to "mls ip cef rate-limit"? If so, what do you > think would be a good value to use on a Sup 720? We'd like to set it > so that the CPU isn't overloaded so much that routing protocols drop > and we don't lose our SSH sessions. That way we can monitor it and > watch to see when the CPU drops back down to normal. > > Thanks! > John > > On Tue, Sep 21, 2010 at 2:16 PM, John Neiberger <jneiber...@gmail.com> wrote: >> Thanks. I've never used the MLS limiters before, so I'll look into how >> they're configured in case we decide to use them. But we also have the >> option of moving most of our production traffic away from these boxes >> temporarily, so we may be able to just deal with the temporary chaos. >> >> John >> >> On Tue, Sep 21, 2010 at 2:04 PM, Benjamin Lovell <belov...@cisco.com> wrote: >>> Excellent point and suggestion. This should prevent punts from smashing >>> your control plane and causing a cascading effect like the one I described. >>> >>> -Ben >>> >>> >>> On Sep 21, 2010, at 3:47 PM, Phil Mayers wrote: >>> >>>> On 09/21/2010 08:27 PM, Benjamin Lovell wrote: >>>>> The primary thing to worry about here is the mcast packet rate not >>>>> number of mroutes. Replication change will cause all mcast packets to >>>>> be punted to CPU for a short period(few 100 msec or so). >>>> >>>> Remember you can rate-limit this with the MLS limiters. Whilst they >>>> defaults are (very) high, lowering it for the duration of this change >>>> could ease the problems. >>>> _______________________________________________ >>>> cisco-nsp mailing list cisco-...@puck.nether.net >>>> https://puck.nether.net/mailman/listinfo/cisco-nsp >>>> archive at http://puck.nether.net/pipermail/cisco-nsp/ >>> >>> >>> _______________________________________________ >>> cisco-nsp mailing list cisco-...@puck.nether.net >>> https://puck.nether.net/mailman/listinfo/cisco-nsp >>> archive at http://puck.nether.net/pipermail/cisco-nsp/ >>> >> > _______________________________________________ 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/
