I assume you have clients on the router having the issues. Have you
verified you are seeing the IGMP membership report? Another troubleshooting
step is to do a manual join on an interface (downstream/loopback/whatever)
and see what you get.
How about some "sh ip mroute <group_ip> count" and "sh ip rpf <ip_addr>"?
Without understanding the topology and configs, that's about all I can give
you.
tv
----- Original Message -----
From: "ML" <m...@kenweb.org>
To: <cisco-nsp@puck.nether.net>
Sent: Monday, May 10, 2010 9:20 PM
Subject: [c-nsp] Cannot join a few multicast groups
I'm having trouble joining some multicast streams. The upstream router
joins it fine. The upstream has (*,G) and (S,G) in the mroute table.
Downstream doesn't have (S,G). This is a sparse mode environment with a
static RP.
From the router with trouble I can ping the mcast group and get
responses from the group members. I can ping the unicast source of the
group, the RP..anything I can think of to rule out an RPF problem.
Keep in mind that we're having trouble with 5 out of ~400 multicast
groups. Of course nothing that we know has changed at all.
Thanks
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