2 switches (4506 and 3750) are connected to a core 6509-E via VLAN trunks. Multicast source is on 6509-E. RP config is done. What I see is multicast to 4506 is working fine but not to 3750. IGMP report on 6509-E shows there is a group report from 3750 for that multicast address. However OIL from show ip mr on 6509 still shows Null to subscriber vlan in 3750. What could be the cause that multicast traffic is blocked to 3750?
Thanks in advance for your kind help!