[ 1772.071524] br0: port 1(dummy0) entered blocking state
[ 1772.071556] br0: port 1(dummy0) entered disabled state
[ 1772.071579] dummy0: entered allmulticast mode
[ 1772.071619] dummy0: entered promiscuous mode
[ 1772.074887] br0: port 1(dummy0) entered blocking state
[ 1772.074934] br0: port 1(dummy0) entered forwarding state
[ 1772.307195] dummy0: left allmulticast mode
[ 1772.307222] dummy0: left promiscuous mode
[ 1772.307242] br0: port 1(dummy0) entered disabled state