[ 1965.983588][ T8568] br0: port 1(dummy0) entered blocking state
[ 1965.983875][ T8568] br0: port 1(dummy0) entered disabled state
[ 1965.984141][ T8568] dummy0: entered allmulticast mode
[ 1965.985882][ T8568] dummy0: entered promiscuous mode
[ 1966.022979][ T8569] br0: port 1(dummy0) entered blocking state
[ 1966.023254][ T8569] br0: port 1(dummy0) entered forwarding state
[ 1968.359506][   T67] dummy0: left allmulticast mode
[ 1968.360722][   T67] dummy0: left promiscuous mode
[ 1968.360986][   T67] br0: port 1(dummy0) entered disabled state