[ 1533.499203] br0: port 1(dummy0) entered blocking state
[ 1533.499308] br0: port 1(dummy0) entered disabled state
[ 1533.499420] dummy0: entered allmulticast mode
[ 1533.499538] dummy0: entered promiscuous mode
[ 1533.502536] br0: port 1(dummy0) entered blocking state
[ 1533.502629] br0: port 1(dummy0) entered forwarding state
[ 1533.688580] dummy0: left allmulticast mode
[ 1533.688623] dummy0: left promiscuous mode
[ 1533.688648] br0: port 1(dummy0) entered disabled state