Thus spake Phil Mayers (p.may...@imperial.ac.uk) on Fri, May 09, 2014 at 06:20:39PM +0100: > On 09/05/2014 16:26, Scott Voll wrote: > >OK so we are moving from a Unicast to Multicast video stream and we have > >been reporting on how many people are watching the stream. as we move this > >to a multicast stream how do I report on how many people are watching? > > > >Are there package apps that will do this? the only thing I can think to do > >is run through every switch and see if it's receiving the stream and try to > >sparse out the numbers. > > > >There has to be a better way > > Depends on the network topology and devices. > > e.g. In our network, multicast receivers have cat6k as the last-hop > egress router, and routed interfaces are SVIs. In this config, you > can run: > > sh ip igmp snooping statistics [int VlanX] > > ...which shows something like what you want: > > Source/Group Interface Reporter Uptime Last-Join Last-Leave > 0.0.0.0/239.a.b.c VlX:GiX/Y 192.0.2.28 4w0d 4w0d - > > The absolute furthest "up" (towards the source) you might gather ths > info is the last-hop router(s) for all the receiver(s) as hops > further upstream just don't see receiver activity, only aggregated > joins. > > Obviously layer2 devices downstream of the last-hop router will see > it and may or may not give you this info. > > A totally different approach is to have the receiver report back via > RTCP or similar, but obviously that requires client-side software > support.
Multicast quicktime clients can report back to a quicktime server, though I've not not looked at how they do this. Dale _______________________________________________ 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/