Things appear to be somewhat random; however setting the multicast_querier flag to 1 resulted in all my clustered spring back to life:
for i in `seq 0 10`; do juju ssh $i "echo -n 1 | sudo tee /sys/devices/virtual/net/juju-br0/bridge/multicast_querier"; done Juju creates a bridge where this is not enabled by default. ** Changed in: linux (Ubuntu) Status: Incomplete => Invalid -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to lxc in Ubuntu. https://bugs.launchpad.net/bugs/1402763 Title: Multicast traffic not propating correctly over linux bridge To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1402763/+subscriptions -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs