I have configured multicast (ip pim dense-mode) on two 2911 routers that are connected by a Multilink (3Mbps) Wan connection.
The configuration work fine for awhile and sometimes all day but at some point one of the Multilink interfaces stop passing multicast traffic.
I perform a sh multilink 1 on the interfaces and one interfaces show the multicast packets incrementing and the other does not, it just stops.
The only fix for this is to hard reboot both routers and the multicast traffic begins to flow once again.
Has anyone heard or seen an issue simular to this?
I am not sure that dense is easier than sparse. I had an issue a few months back where my multicast would stop every 3 to 4 minutes then come back up after a while and it ended up being an RP issue.