[ 1920.105962][ T3811] br0: port 1(dummy0) entered blocking state
[ 1920.106147][ T3811] br0: port 1(dummy0) entered disabled state
[ 1920.106310][ T3811] dummy0: entered allmulticast mode
[ 1920.107163][ T3811] dummy0: entered promiscuous mode
[ 1920.136371][ T3812] br0: port 1(dummy0) entered blocking state
[ 1920.136915][ T3812] br0: port 1(dummy0) entered forwarding state
[ 1922.084999][   T12] dummy0: left allmulticast mode
[ 1922.086158][   T12] dummy0: left promiscuous mode
[ 1922.086436][   T12] br0: port 1(dummy0) entered disabled state