[ 1919.885334] br0: port 1(dummy0) entered blocking state
[ 1919.885383] br0: port 1(dummy0) entered disabled state
[ 1919.885423] dummy0: entered allmulticast mode
[ 1919.885472] dummy0: entered promiscuous mode
[ 1919.888887] br0: port 1(dummy0) entered blocking state
[ 1919.888918] br0: port 1(dummy0) entered forwarding state
[ 1920.138609] dummy0: left allmulticast mode
[ 1920.138647] dummy0: left promiscuous mode
[ 1920.138677] br0: port 1(dummy0) entered disabled state