I will be deploying 2 4900M switches uplinked together in a network for intensive video applications. My question is how to constrain multicast traffic with these 2 switches. Since the network is flat there is no real interfaces required except for management. Should I configure a vlan 1 interface on one of the switches and ip pim sparse mode on that interface along with IGMP snooping on both switches? Would this act as a means to constrain Multicast traffic? Would this require the IP Base or Enhanced for the 4900M switches?
Or should I get a router instead and create a superfluous subnet?
thanks for help
It is available in all images as its part of the IGMP Snooping process.
In brief, IGMP's purpose is to keep a multicast router informed whether there are hosts that want to receive specific multicast addressed traffic. The multicast router will occasionally poll or query all hosts to see if they want to continue to receive an active multicast stream (this precludes forwarding a multicast stream if hosts no longer desire the traffic and don't provide the [later IGMP ver.] "leave" message).
IGMP snooping "taps" the IGMP messages between the multicast (normally a) router and the multicast receiving hosts. If there is no mulicast querier, IGMP snooping won't function correctly. Some other device needs to generate the multicast IGMP queries (which often can be enabled by IGMP snooping capable switches).