[ 1903.466956] br0: port 1(dummy0) entered blocking state
[ 1903.467001] br0: port 1(dummy0) entered disabled state
[ 1903.467037] dummy0: entered allmulticast mode
[ 1903.467096] dummy0: entered promiscuous mode
[ 1903.470781] br0: port 1(dummy0) entered blocking state
[ 1903.470842] br0: port 1(dummy0) entered forwarding state
[ 1903.753384] dummy0: left allmulticast mode
[ 1903.753427] dummy0: left promiscuous mode
[ 1903.753458] br0: port 1(dummy0) entered disabled state