[ 1871.331496] br0: port 1(dummy0) entered blocking state
[ 1871.331566] br0: port 1(dummy0) entered disabled state
[ 1871.331636] dummy0: entered allmulticast mode
[ 1871.331718] dummy0: entered promiscuous mode
[ 1871.334942] br0: port 1(dummy0) entered blocking state
[ 1871.334976] br0: port 1(dummy0) entered forwarding state
[ 1871.582094] dummy0: left allmulticast mode
[ 1871.582166] dummy0: left promiscuous mode
[ 1871.582267] br0: port 1(dummy0) entered disabled state