I am trying to start a bridge connection and force it to use IGMPV3.
The following command will explain my issue better :
The below is the output of force_igmp_version before issuing brctl commands
/ # cat /proc/sys/net/ipv4/conf/br/force_igmp_version
3
/ # cat /proc/net/igmp
Idx Device : Count Querier Group Users Timer Reporter
1 lo : 1 V3
E0000001 1 0:00000000 0
3 eth0 : 1 V3
E0000001 1 0:00000000 0
4 eth1 : 1 V3
E0000001 1 0:00000000 0
5 eth2 : 1 V3
E0000001 1 0:00000000 0
Then I issue a set of brctl command to add a bridge and add my eth0 and eth1 interface to the bridge and do ifconfig on the bridge. But surprisingly bridge created is still using IGMPV2.
/ # cat /proc/net/igmp
Idx Device : Count Querier Group Users Timer Reporter
1 lo : 1 V3
E0000001 1 0:00000000 0
3 eth0 : 1 V3
E0000001 1 0:00000000 0
4 eth1 : 1 V3
E0000001 1 0:00000000 0
5 eth2 : 1 V3
E0000001 1 0:00000000 0
6 br : 1 V2
E0000001 1 0:00000000 0
Is there anything I am missing to configure to make the bridge start with IGMPV3?
How can I force the bridge to use IGMPV3?
Best Answer
I'm looking into this issue myself. So far i have found only that IGMPv3 is not supported in bridge, or at least not supported in all versions of linux kernel. I would try to dissable IGMP Snooping in bridge. I expect that then IGMPv3 packets will be sent.