[ 1907.805386] br0: port 1(dummy0) entered blocking state
[ 1907.805426] br0: port 1(dummy0) entered disabled state
[ 1907.805479] dummy0: entered allmulticast mode
[ 1907.805536] dummy0: entered promiscuous mode
[ 1907.809186] br0: port 1(dummy0) entered blocking state
[ 1907.809220] br0: port 1(dummy0) entered forwarding state
[ 1908.060798] dummy0: left allmulticast mode
[ 1908.060835] dummy0: left promiscuous mode
[ 1908.060892] br0: port 1(dummy0) entered disabled state