[ 1907.442805] br0: port 1(dummy0) entered blocking state
[ 1907.442843] br0: port 1(dummy0) entered disabled state
[ 1907.442880] dummy0: entered allmulticast mode
[ 1907.442924] dummy0: entered promiscuous mode
[ 1907.445715] br0: port 1(dummy0) entered blocking state
[ 1907.445778] br0: port 1(dummy0) entered forwarding state
[ 1907.623295] dummy0: left allmulticast mode
[ 1907.623325] dummy0: left promiscuous mode
[ 1907.623352] br0: port 1(dummy0) entered disabled state