[ 1902.852827][ T8883] br0: port 1(dummy0) entered blocking state
[ 1902.853030][ T8883] br0: port 1(dummy0) entered disabled state
[ 1902.853211][ T8883] dummy0: entered allmulticast mode
[ 1902.854104][ T8883] dummy0: entered promiscuous mode
[ 1902.882072][ T8884] br0: port 1(dummy0) entered blocking state
[ 1902.882379][ T8884] br0: port 1(dummy0) entered forwarding state
[ 1904.713230][   T12] dummy0: left allmulticast mode
[ 1904.713435][   T12] dummy0: left promiscuous mode
[ 1904.713728][   T12] br0: port 1(dummy0) entered disabled state