The total of the multicast sources is 4Gbps so I don't think a 7200 would work unfortunately. The router would mostly serve as a IGMP querier and would only ever route 2-3 streams at a time, so I think my worst case would be sum of all sources + 3 streams
The 4948 says "Hardware-based wire-speed multicast management" but I'm not sure if that is marketing speak for "igmp snooping" or "hardware multicast routing". A 6500 seems like overkill but that might be my only option. Thanks, Tony -----Original Message----- From: Adrian Minta [mailto:[email protected]] Sent: Tuesday, March 16, 2010 1:05 PM To: Tony Bunce; [email protected] Subject: Re: [c-nsp] Multicast Core Tony Bunce wrote: > I'm looking for a router to sit at the core of a small-ish multicast network > (about 100 sources and receivers total, but would expect it to double over > time). Currently all of the sources and receivers are in the same VLAN but > we would like for the occasional receiver to be located in a different vlan. > We are currently using 2960Gs with IGMP querier enabled; which works but > that doesn't look like it is going to scale well. It looks like the switch > sends ALL multicast data to the mrouter port so we are going to need > something that can handle all the traffic (probably around 4Gbps), so even if > we only need to route 1 20Mbps stream to a different vlan the router has to > receive all 4Gbps of traffic. > > Does anyone have any recommendations for this scenario? I'm thinking a 4948 > or 3750G would work. > You will need a router in the path. The router need to support only the bandwith summ of all the multicast sources multiply with the number of vlans ( worst case scenario) . Dowstream switches will do the replication of pachets. 3750G will not handle this becase multicast routing is done in CPU. I believe the first switch that do multicast routing in hardware is 6500. If all the multicast streams multiply by the number of vlans is bellow 1Gbps a "soft" router like 7200NPE G1 will do the job. _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
