I have a problem with an IP Multicast application running on Red Hat
Linux with mrouted version 3.9 beta 3.

The problem is that when my application drops a group (first by using
IP_DROP_MEMBERSHIP, then closing the socket), the nearest mrouted
router continues to forward packets from the group to the client.

There occurs even when I have just 1 client running, so it isn't that
there are other clients on the same LAN requesting the same multicast
group.

Is there any way to make mrouted act upon the IP_DROP_MEMBERSHIP
command? How can I get the smallest latency between the IP_DROP_MEMBERSHIP
command and the actual end of packets being forwarded along my
local link?

Thanks,
Dave