I have diagnosed and fixed this problem. IGMP snooping does not work on a VLAN which is part of the switch's management VLAN. So create a video VLAN and enable IGMP snooping for that VLAN. You will also need some device on that VLAN issuing IGMP q...
I have just purchased a SG200-26 and have the same problem as is described above when IGMP snooping is enabled: with only one linux source of multicast packets and one linux listener using a small perl script to generate IGMPv3 queries, the listene...