[ 1987.388834][ T7896] br0: port 1(dummy0) entered blocking state
[ 1987.389029][ T7896] br0: port 1(dummy0) entered disabled state
[ 1987.389202][ T7896] dummy0: entered allmulticast mode
[ 1987.390084][ T7896] dummy0: entered promiscuous mode
[ 1987.409143][ T7897] br0: port 1(dummy0) entered blocking state
[ 1987.409367][ T7897] br0: port 1(dummy0) entered forwarding state
[ 1989.415805][   T12] dummy0: left allmulticast mode
[ 1989.415966][   T12] dummy0: left promiscuous mode
[ 1989.416176][   T12] br0: port 1(dummy0) entered disabled state