Hi Christian, You will need to explain more about the topology, your multicast setup and the traffic flows, for instance: - Are the foundary switches acting as your RPs? - Have you any other commands applied which will cause multicasts to be process switched? - Do you have high rates of multicast on the network? - Are you using any multicast groups which will appear the same as well known multicast groups at Layer 2 (e.g. x.0.0.1, x.0.0.2 etc)?
If the Foundary switches are your RPs, the requirement to decapsulate register messages could explain why these are affected much more than your 6500s, 3750s and netscreens. 'ip pim register-rate-limit 5' applied to the cisco designated routers will help if that is the problem (not sure about equivalent netscreeen command). Paul. Christian MacNevin wrote: > Hi > I've only got the most superficial of ideas what's going on with this > network, but i've been asked if there's any particular reason > some Foundry switches would be being brought to their knees every time > mcast is switched on in a network. 65s, 3750s and Netscreens > all handle it fine. > Given Foundry's marketing, they dobrag that everything's handled in > port-based ASICs, but obviously it sounds like this stuff is going > to the processor. Maybe it's PIM Sniffing not supported in hardware, not > sure. > Anyway, sorry for the amazing vagary here, but it's all I've got right > now. Any thoughts? > Cheers > Christian_______________________________________________ > 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/ > -- HEAnet Limited Ireland's Education & Research Network 5 George's Dock, IFSC, Dublin 1, Ireland Tel: +353.1.6609040 Web: http://www.heanet.ie Company registered in Ireland: 275301 Please consider the environment before printing this e-mail. _______________________________________________ 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/
