[ 1684.359522] br0: port 1(dummy0) entered blocking state
[ 1684.359563] br0: port 1(dummy0) entered disabled state
[ 1684.359600] dummy0: entered allmulticast mode
[ 1684.359653] dummy0: entered promiscuous mode
[ 1684.362584] br0: port 1(dummy0) entered blocking state
[ 1684.362654] br0: port 1(dummy0) entered forwarding state
[ 1684.548879] dummy0: left allmulticast mode
[ 1684.548911] dummy0: left promiscuous mode
[ 1684.548936] br0: port 1(dummy0) entered disabled state