[ 1750.487604] br0: port 1(dummy0) entered blocking state
[ 1750.487642] br0: port 1(dummy0) entered disabled state
[ 1750.487681] dummy0: entered allmulticast mode
[ 1750.487732] dummy0: entered promiscuous mode
[ 1750.490474] br0: port 1(dummy0) entered blocking state
[ 1750.490512] br0: port 1(dummy0) entered forwarding state
[ 1750.682692] dummy0: left allmulticast mode
[ 1750.682718] dummy0: left promiscuous mode
[ 1750.682747] br0: port 1(dummy0) entered disabled state