[ 1907.024756] br0: port 1(dummy0) entered blocking state
[ 1907.024794] br0: port 1(dummy0) entered disabled state
[ 1907.024835] dummy0: entered allmulticast mode
[ 1907.024882] dummy0: entered promiscuous mode
[ 1907.028336] br0: port 1(dummy0) entered blocking state
[ 1907.028371] br0: port 1(dummy0) entered forwarding state
[ 1907.289677] dummy0: left allmulticast mode
[ 1907.289704] dummy0: left promiscuous mode
[ 1907.289731] br0: port 1(dummy0) entered disabled state