[ 2179.278842][  T457] br0: port 1(dummy0) entered blocking state
[ 2179.279053][  T457] br0: port 1(dummy0) entered disabled state
[ 2179.279225][  T457] dummy0: entered allmulticast mode
[ 2179.280261][  T457] dummy0: entered promiscuous mode
[ 2179.302615][  T458] br0: port 1(dummy0) entered blocking state
[ 2179.302879][  T458] br0: port 1(dummy0) entered forwarding state
[ 2181.371719][   T72] dummy0: left allmulticast mode
[ 2181.372012][   T72] dummy0: left promiscuous mode
[ 2181.372246][   T72] br0: port 1(dummy0) entered disabled state