[ 1724.353888] br0: port 1(dummy0) entered blocking state
[ 1724.353962] br0: port 1(dummy0) entered disabled state
[ 1724.354029] dummy0: entered allmulticast mode
[ 1724.354116] dummy0: entered promiscuous mode
[ 1724.357639] br0: port 1(dummy0) entered blocking state
[ 1724.357675] br0: port 1(dummy0) entered forwarding state
[ 1724.607367] dummy0: left allmulticast mode
[ 1724.607400] dummy0: left promiscuous mode
[ 1724.607429] br0: port 1(dummy0) entered disabled state