[ 1939.149597] br0: port 1(dummy0) entered blocking state
[ 1939.149641] br0: port 1(dummy0) entered disabled state
[ 1939.149678] dummy0: entered allmulticast mode
[ 1939.149732] dummy0: entered promiscuous mode
[ 1939.153162] br0: port 1(dummy0) entered blocking state
[ 1939.153194] br0: port 1(dummy0) entered forwarding state
[ 1939.398907] dummy0: left allmulticast mode
[ 1939.398949] dummy0: left promiscuous mode
[ 1939.399029] br0: port 1(dummy0) entered disabled state