[ 1597.684956] br0: port 1(dummy0) entered blocking state
[ 1597.684983] br0: port 1(dummy0) entered disabled state
[ 1597.685006] dummy0: entered allmulticast mode
[ 1597.685045] dummy0: entered promiscuous mode
[ 1597.687980] br0: port 1(dummy0) entered blocking state
[ 1597.688029] br0: port 1(dummy0) entered forwarding state
[ 1597.893079] dummy0: left allmulticast mode
[ 1597.893131] dummy0: left promiscuous mode
[ 1597.893185] br0: port 1(dummy0) entered disabled state