Sounds like you want to enable the "noflood" option in the mrouted.conf. Flooding session data will speed up the starting/restarting the multicast connection at the expense of bandwidth.
The next thing I would suggest is to dump the internal routing and cache tables on both multicast routers to see if there is any strange subscriptions on the network that has the switch. --Mark Tinguely To Unsubscribe: send mail to [EMAIL PROTECTED] with "unsubscribe freebsd-questions" in the body of the message