How do I find out where a multicast address is coming from?

Unanswered Question
Feb 8th, 2007

I have configured multicast in our enterprise using Anycast RP, two RPs and ip pim sparse-mode on all interfaces. When I look at the mroute table I notice a lot of multicast group addresses that I am not familiar with. Here is a short list of what shows up:

(*, 232.133.104.73), 33w2d/00:03:03, RP 164.72.239.42, flags: S

Incoming interface: Null, RPF nbr 0.0.0.0

Outgoing interface list:

Port-channel3, Forward/Sparse, 14w6d/00:03:03

(*, 235.80.68.83), 37w4d/00:02:58, RP 164.72.239.42, flags: SJC

Incoming interface: Null, RPF nbr 0.0.0.0

Outgoing interface list:

FastEthernet4/5, Forward/Sparse, 3d03h/00:02:23

Port-channel3, Forward/Sparse, 14w6d/00:02:42

(*, 226.195.91.116), 03:07:11/00:03:22, RP 164.72.239.42, flags: S

Incoming interface: Null, RPF nbr 0.0.0.0

Outgoing interface list:

Port-channel3, Forward/Sparse, 03:07:11/00:03:22

(*, 235.141.247.133), 03:07:12/00:03:17, RP 164.72.239.42, flags: S

Incoming interface: Null, RPF nbr 0.0.0.0

Outgoing interface list:

Port-channel3, Forward/Sparse, 03:07:12/00:03:17

(*, 225.158.55.221), 2w4d/00:03:14, RP 164.72.239.42, flags: S

Incoming interface: Null, RPF nbr 0.0.0.0

Outgoing interface list:

Port-channel3, Forward/Sparse, 1w4d/00:03:14

This output is from a 6509/sup720 with eigrp and multicast routing turned on. It is also one of the RPs.

I want to find out what/where/who is on the network with multicast applications and document all the mulitcast groups so I know what is going on.

How do I use the router multicast commands, sho pim, sho mroute, etc., to locate where the devices are that are putting these entries in the mroute table?

I have this problem too.
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