[ 1920.405241] br0: port 1(dummy0) entered blocking state
[ 1920.405278] br0: port 1(dummy0) entered disabled state
[ 1920.405300] dummy0: entered allmulticast mode
[ 1920.405336] dummy0: entered promiscuous mode
[ 1920.408526] br0: port 1(dummy0) entered blocking state
[ 1920.408550] br0: port 1(dummy0) entered forwarding state
[ 1920.642188] dummy0: left allmulticast mode
[ 1920.642242] dummy0: left promiscuous mode
[ 1920.642317] br0: port 1(dummy0) entered disabled state