[ 1800.666569] br0: port 1(dummy0) entered blocking state
[ 1800.666606] br0: port 1(dummy0) entered disabled state
[ 1800.666644] dummy0: entered allmulticast mode
[ 1800.666692] dummy0: entered promiscuous mode
[ 1800.670122] br0: port 1(dummy0) entered blocking state
[ 1800.670186] br0: port 1(dummy0) entered forwarding state
[ 1800.913281] dummy0: left allmulticast mode
[ 1800.913319] dummy0: left promiscuous mode
[ 1800.913348] br0: port 1(dummy0) entered disabled state