[c-nsp] Cannot join a few multicast groups

[Tony Varriale]

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" <ml at kenweb.org>
To: <cisco-nsp at 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
>
>
>
> _______________________________________________
> cisco-nsp mailing list  cisco-nsp at puck.nether.net
> https://puck.nether.net/mailman/listinfo/cisco-nsp
> archive at http://puck.nether.net/pipermail/cisco-nsp/