[ 1743.016891] br0: port 1(dummy0) entered blocking state
[ 1743.016965] br0: port 1(dummy0) entered disabled state
[ 1743.017040] dummy0: entered allmulticast mode
[ 1743.017127] dummy0: entered promiscuous mode
[ 1743.019994] br0: port 1(dummy0) entered blocking state
[ 1743.020026] br0: port 1(dummy0) entered forwarding state
[ 1743.219344] dummy0: left allmulticast mode
[ 1743.219379] dummy0: left promiscuous mode
[ 1743.219410] br0: port 1(dummy0) entered disabled state