So my question is, will using IGMP alone(without IGMP snooping, PIM...etc) making router forwarding multicast traffic?
I'm working on a buggy switch, but I don't know about networking too, so I'm not sure the problems is my understanding or this router.
I'm now testing IGMP, the setup is pretty simple:
A <-> Router <-> B
A and B are PC or NB whatever, they both run iperf, A as sender, B as receiver, they join/send certain multicast group. (220.127.116.11)
Router running a default single vlan 1, with all interfaces on it.
After enable IGMP on router and its vlan 1, I can observe from wireshark that router query and B report membership, using show commands on router also confirm the membership.
However then when A pump multicast traffic, I can't see router forwarding traffic to B.
From what I survey from google, most IGMP usage are bind to other protocols, there's hardly any test case about IGMP alone, or the query/report process simply what all IGMP do? itself just maintain membership?
BTW the IGMP snooping works fine, but need running VLC to actively report its membership, after that I can see router forwarding multicast traffic.