[ 1702.199770] br0: port 1(dummy0) entered blocking state
[ 1702.199814] br0: port 1(dummy0) entered disabled state
[ 1702.199845] dummy0: entered allmulticast mode
[ 1702.199911] dummy0: entered promiscuous mode
[ 1702.202558] br0: port 1(dummy0) entered blocking state
[ 1702.202620] br0: port 1(dummy0) entered forwarding state
[ 1702.403752] dummy0: left allmulticast mode
[ 1702.403788] dummy0: left promiscuous mode
[ 1702.403816] br0: port 1(dummy0) entered disabled state