[ 1556.310243] br0: port 1(dummy0) entered blocking state
[ 1556.310314] br0: port 1(dummy0) entered disabled state
[ 1556.310385] dummy0: entered allmulticast mode
[ 1556.310477] dummy0: entered promiscuous mode
[ 1556.313075] br0: port 1(dummy0) entered blocking state
[ 1556.313109] br0: port 1(dummy0) entered forwarding state
[ 1556.498712] dummy0: left allmulticast mode
[ 1556.498782] dummy0: left promiscuous mode
[ 1556.498845] br0: port 1(dummy0) entered disabled state