[ 1551.268609] br0: port 1(dummy0) entered blocking state
[ 1551.268653] br0: port 1(dummy0) entered disabled state
[ 1551.268683] dummy0: entered allmulticast mode
[ 1551.268735] dummy0: entered promiscuous mode
[ 1551.271265] br0: port 1(dummy0) entered blocking state
[ 1551.271324] br0: port 1(dummy0) entered forwarding state
[ 1551.453155] dummy0: left allmulticast mode
[ 1551.453215] dummy0: left promiscuous mode
[ 1551.453278] br0: port 1(dummy0) entered disabled state