Hello, I'm trying to add a bridge port to a multicast group manually to work around the situation where VMs that are live migrated lose their IGMP membership. We have IGMP snooping enabled on the bridge, and during this example there were other VMs on the same bridge/vlan which are part of this multicast group address sending/receiving traffic. These systems are running Ubuntu 14.04 (kernel 3.13). Prior to live migration, I see the IGMP group membership on the kvm hypervisor: $ bridge -d mdb | grep vnet8 dev br.128 port vnet8 grp 239.236.15.150 temp After the live migration, multicast traffic to 239.236.15.150 stops as expected. If I try to manually add the multicast group membership: # bridge mdb add dev br.128 port vnet3 grp 239.236.15.150 temp # bridge mdb list | grep vnet3 dev onebr.128 port vnet3 grp 239.236.15.150 temp The multicast traffic does not resume until the VM sends a IGMP membership report after receiving an IGMP query from the switch, which takes too long most of the time (over a minute). I haven't been able to find anyone online in this situation, so any help would be greatly appreciated. Thank you, Corey Melanson
