[ 1640.640530] br0: port 1(dummy0) entered blocking state
[ 1640.640611] br0: port 1(dummy0) entered disabled state
[ 1640.640682] dummy0: entered allmulticast mode
[ 1640.640776] dummy0: entered promiscuous mode
[ 1640.643691] br0: port 1(dummy0) entered blocking state
[ 1640.643726] br0: port 1(dummy0) entered forwarding state
[ 1640.845734] dummy0: left allmulticast mode
[ 1640.845777] dummy0: left promiscuous mode
[ 1640.845842] br0: port 1(dummy0) entered disabled state