[ 1740.580497] br0: port 1(dummy0) entered blocking state
[ 1740.580533] br0: port 1(dummy0) entered disabled state
[ 1740.580568] dummy0: entered allmulticast mode
[ 1740.580618] dummy0: entered promiscuous mode
[ 1740.583311] br0: port 1(dummy0) entered blocking state
[ 1740.583341] br0: port 1(dummy0) entered forwarding state
[ 1740.776732] dummy0: left allmulticast mode
[ 1740.776762] dummy0: left promiscuous mode
[ 1740.776799] br0: port 1(dummy0) entered disabled state