[ 1880.134130] br0: port 1(dummy0) entered blocking state
[ 1880.134174] br0: port 1(dummy0) entered disabled state
[ 1880.134211] dummy0: entered allmulticast mode
[ 1880.134278] dummy0: entered promiscuous mode
[ 1880.137457] br0: port 1(dummy0) entered blocking state
[ 1880.137492] br0: port 1(dummy0) entered forwarding state
[ 1880.356735] dummy0: left allmulticast mode
[ 1880.356809] dummy0: left promiscuous mode
[ 1880.356903] br0: port 1(dummy0) entered disabled state