[ 1907.258867] br0: port 1(dummy0) entered blocking state
[ 1907.258911] br0: port 1(dummy0) entered disabled state
[ 1907.258945] dummy0: entered allmulticast mode
[ 1907.258995] dummy0: entered promiscuous mode
[ 1907.262539] br0: port 1(dummy0) entered blocking state
[ 1907.262571] br0: port 1(dummy0) entered forwarding state
[ 1907.533330] dummy0: left allmulticast mode
[ 1907.533364] dummy0: left promiscuous mode
[ 1907.533393] br0: port 1(dummy0) entered disabled state