[ 1908.315039] br0: port 1(dummy0) entered blocking state
[ 1908.315117] br0: port 1(dummy0) entered disabled state
[ 1908.315185] dummy0: entered allmulticast mode
[ 1908.315272] dummy0: entered promiscuous mode
[ 1908.318768] br0: port 1(dummy0) entered blocking state
[ 1908.318800] br0: port 1(dummy0) entered forwarding state
[ 1908.580691] dummy0: left allmulticast mode
[ 1908.580728] dummy0: left promiscuous mode
[ 1908.580760] br0: port 1(dummy0) entered disabled state