Multicast routing needs to be enabled on the routers leading to server. PIM needs to be enabled on all interfaces
IGMP allows hosts to tell a router it wants to receive some multicast traffic.
Enable IGMP snooping so the switch knows where to forward multicast traffic.
Multicast macs always start with 0100.5e, 25th bit is always 0 and the remaining are copied from the lower 23 bits of multicast group ip
(S,G) S is source of the multicast stream (server) and G is the multicast group address
(*,G) * refers to Rendezvous Point (local router) and G is the multicast group address
Any source multicasts, (S,G) requires a parent (*,G)
sh ip mroute
verify multicasts routes Both Entries needed *, G S,G
sh ip pim neighbor
verify neighbors verify who is the PIM DR Verify PIM version
sh ip pim rp
verify you can see the pim rondevu point
sh ip pim interface
verify pim is configured
ip multicast routing
global command to enable multicast
Some Switch Commands
show ip igmp snooping show ip igmp snooping vlan xxxx show ip igmp snooping groups show ip igmp snooping mrouter show mac address-table multicast