Is there anything that would stop a multicast transmission between 2 devices on the same vlan . The scenario is 2 nokia 10I's one hooked to one 6509 sup 720 and the other on another 720 box both connected together with a etherchannel trunk . Trunk is working fine between the boxes . Spanning tree for the vlan knows the root of the other box as primary so layer 2 is working . Etherchannel and trunk working ok . All vlans allowed across the trunk between the 6500's . These are setup as layer 2 only with a single address to manage the box . Is it possible for these devices not to talk in a simple setup like or is the issue with the nokias. If they hook the nokias together on a single switch they say they talk ok . Any ideas why they wouldn't talk across a layer 2 vlan ?
I think the boxes have enterprise services running 12.2.18 SXF17 . Not at work right now . don't know what multicast address the nokias use . May have to do some searching around.
I think the issue you are seeing is to do with having IGMP snooping configured but nothing making the IGMP queries ie. you haven't got PIM enabled on a L3 vlan interface and you haven't specifically enabled the IGMP snooping querier function, see this doc for more details -
The 6500 default config with your IOS is IGMP snooping is enabled but the IGMP snooping querier function is not enabled. There are a number of ways to fix this as outlined in the above doc -
1) static multicast mac-address entries
2) enable PIM on the L3 vlan interface so IGMP queries are sent out
3) If the switch supports it enable the IGMP snooping querier function
4) disable IGMP snooping - makes multicast broadcast
I would go with 3) as the 6500 supports the IGMP snooping querier feature -