[ 1637.276027] br0: port 1(dummy0) entered blocking state
[ 1637.276072] br0: port 1(dummy0) entered disabled state
[ 1637.276109] dummy0: entered allmulticast mode
[ 1637.276162] dummy0: entered promiscuous mode
[ 1637.279577] br0: port 1(dummy0) entered blocking state
[ 1637.279643] br0: port 1(dummy0) entered forwarding state
[ 1637.494207] dummy0: left allmulticast mode
[ 1637.494251] dummy0: left promiscuous mode
[ 1637.494287] br0: port 1(dummy0) entered disabled state