[ 1703.414555] br0: port 1(dummy0) entered blocking state
[ 1703.414619] br0: port 1(dummy0) entered disabled state
[ 1703.414680] dummy0: entered allmulticast mode
[ 1703.414758] dummy0: entered promiscuous mode
[ 1703.417216] br0: port 1(dummy0) entered blocking state
[ 1703.417249] br0: port 1(dummy0) entered forwarding state
[ 1703.582530] dummy0: left allmulticast mode
[ 1703.582593] dummy0: left promiscuous mode
[ 1703.582663] br0: port 1(dummy0) entered disabled state