Не помогло.
Снял tcpdump в момент переключения канала на vlc
на eth0:
22:53:03.520434 IP (tos 0xc0, ttl 1, id 0, offset 0, flags [DF], proto IGMP (2), length 32, options (RA))
192.168.2.2 > 224.0.0.2: igmp leave 239.255.4.16
и на br0:
22:53:03.520395 IP (tos 0xc0, ttl 1, id 0, offset 0, flags [DF], proto IGMP (2), length 32, options (RA))
192.168.2.2 > 224.0.0.2: igmp leave 239.255.4.16
22:53:03.522587 IP (tos 0xc0, ttl 1, id 0, offset 0, flags [DF], proto IGMP (2), length 32, options (RA))
0.0.0.0 > 224.0.0.1: igmp query v2 [max resp time 10] [gaddr 239.255.4.16]
22:53:03.530643 IP (tos 0xc0, ttl 1, id 0, offset 0, flags [DF], proto IGMP (2), length 32, options (RA))
192.168.2.2 > 239.255.4.9: igmp v2 report 239.255.4.9