Cisco CGMP and IGMP interaction
Posted on 2011-09-06
I am trying to understand on how multicast works exactly especially between cgmp and igmp in a layer 2 environment when it is not setup correctly. I have illustrated a reference diagram for reference:
Multicast server ---> Cisco switch (CGMP) ---- Cisco 6500 (Only with IGMP/PIM enabled)----Cisco switch for clients (IGMP enabled)
When the multicast server send a join message to the multicast group; I am trying to underrstand if it may successfully advertise its group address since cgmp is not enabled on the Cisco 6500.
From my understanding, the cisco switch connected to the multicast server will forward the igmp join, however since the cisco 6500 is not setup for cgmp; it will not forward the cgmp join towards the switch and I am not sure if the clients may join the multicast group address created by the server?