Hi. I'm setting up IP Multicast for the first time (I'm not experienced with Multicast at all), and I'd like a few pointers in how to set it up in the best way. Attached is a sketch of the network as it is now.
In my lab, I've managed to get it to work: the IOS switches seems to have multicast turned on by default. To get the routers to work, I just entered "ip multicast-routing" globally and "ip pim dense-mode" on the participating interfaces.
What I like to know, is how to set up multicast in my network, so only the clients on 10.1.20.0/24 get the multicast traffic from 10.1.10.37. In other words: as little noise as possible :-)
Just to add to Giuseppe's/Joseph's posts.
Because you only have a small network you can use static RP. So assuming you choose the 6500 as the RP
1) on the 6500 and 7200 add this command in global config mode -
ip pim rp-address 10.74.2.5
2) Under each of the interfaces on the 6500 and 4500 add
"ip pim sparse-mode"
3) As already noted enable IGMP snooping on all your L2 switches.
4) Make sure that the TTL of the multicast packets are at least set to 3