I have these interfaces set up on the router (Linux machine):
br0: flags=4419<UP,BROADCAST,RUNNING,PROMISC,MULTICAST> mtu 1500 inet 192.168.0.3 netmask 255.255.255.0 broadcast 192.168.0.255 bridge name bridge id STP enabled interfaces br0 8000.00156d8591ec no eth0 wlan0 eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 inet6 fe80::7271:bcff:feb1:d9cf prefixlen 64 scopeid 0x20<link> eth1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 inet 10.200.44.147 netmask 255.255.255.128 broadcast 10.200.44.255 wlan0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 inet6 fe80::215:6dff:fe85:91ec prefixlen 64 scopeid 0x20<link>
In br0 there are two interfaces (eth0 - local home network and wlan0 - wireless home network). eth1 is internet connection interface and is not part of the br0.
I use mumudvb for sending multicast IPTV with IP group 18.104.22.168 (udp/1234) and receiving this multicast traffic on a different machine on LAN using VLC player.
When I configure it to send multicast over eth0 all works well on home LAN but I can't join the multicast group from the router itself.
That's why I configured it to send multicast over br0 (makes more sense - then I can join the multicast group from the LAN eth0 as well as router itself) but after about 5 minutes since join, LAN multicast connection drops (without sending any IGMP message). But I can join again and it will work for next 5 minutes again, then drop.
Why is it dropping when sending multicast over br0 and not dropping when sending directly through eth0? Am I missing some configuration on the bridge? What can expire during this period? For example STP is disabled for the bridge but it shouldn't affect this?
When I join the br0 multicast group from the router itself, it won't drop. Only when subscribed from a machine connected to the br0 through eth0.