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 192.168.0.255bridge name bridge id       STP enabled interfacesbr0     8000.00156d8591ec   no      eth0                            wlan0eth0: 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 10.200.44.255wlan0: 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 239.100.0.1 (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.
br0 causes to drop multicast connection after 5 minutes
linux;bridge;multicast