[ 1923.296505] br0: port 1(dummy0) entered blocking state
[ 1923.296579] br0: port 1(dummy0) entered disabled state
[ 1923.296644] dummy0: entered allmulticast mode
[ 1923.296728] dummy0: entered promiscuous mode
[ 1923.300225] br0: port 1(dummy0) entered blocking state
[ 1923.300257] br0: port 1(dummy0) entered forwarding state
[ 1923.552123] dummy0: left allmulticast mode
[ 1923.552162] dummy0: left promiscuous mode
[ 1923.552211] br0: port 1(dummy0) entered disabled state