[ 2394.124343][  T310] br0: port 1(dummy0) entered blocking state
[ 2394.124627][  T310] br0: port 1(dummy0) entered disabled state
[ 2394.124880][  T310] dummy0: entered allmulticast mode
[ 2394.125849][  T310] dummy0: entered promiscuous mode
[ 2394.157742][  T311] br0: port 1(dummy0) entered blocking state
[ 2394.158180][  T311] br0: port 1(dummy0) entered forwarding state
[ 2396.509368][   T12] dummy0: left allmulticast mode
[ 2396.510100][   T12] dummy0: left promiscuous mode
[ 2396.510715][   T12] br0: port 1(dummy0) entered disabled state