[ 1939.487811] br0: port 1(dummy0) entered blocking state
[ 1939.487869] br0: port 1(dummy0) entered disabled state
[ 1939.487906] dummy0: entered allmulticast mode
[ 1939.487968] dummy0: entered promiscuous mode
[ 1939.491462] br0: port 1(dummy0) entered blocking state
[ 1939.491526] br0: port 1(dummy0) entered forwarding state
[ 1939.768360] dummy0: left allmulticast mode
[ 1939.768393] dummy0: left promiscuous mode
[ 1939.768429] br0: port 1(dummy0) entered disabled state