[ 1557.667659] br0: port 1(dummy0) entered blocking state
[ 1557.667716] br0: port 1(dummy0) entered disabled state
[ 1557.667746] dummy0: entered allmulticast mode
[ 1557.667799] dummy0: entered promiscuous mode
[ 1557.670399] br0: port 1(dummy0) entered blocking state
[ 1557.670462] br0: port 1(dummy0) entered forwarding state
[ 1557.847460] dummy0: left allmulticast mode
[ 1557.847512] dummy0: left promiscuous mode
[ 1557.847546] br0: port 1(dummy0) entered disabled state