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.
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