[ 1947.443422] br0: port 1(dummy0) entered blocking state
[ 1947.443500] br0: port 1(dummy0) entered disabled state
[ 1947.443572] dummy0: entered allmulticast mode
[ 1947.443660] dummy0: entered promiscuous mode
[ 1947.447331] br0: port 1(dummy0) entered blocking state
[ 1947.447364] br0: port 1(dummy0) entered forwarding state
[ 1947.716816] dummy0: left allmulticast mode
[ 1947.716884] dummy0: left promiscuous mode
[ 1947.716947] br0: port 1(dummy0) entered disabled state