[ 1772.168418] br0: port 1(dummy0) entered blocking state
[ 1772.168486] br0: port 1(dummy0) entered disabled state
[ 1772.168554] dummy0: entered allmulticast mode
[ 1772.168638] dummy0: entered promiscuous mode
[ 1772.172048] br0: port 1(dummy0) entered blocking state
[ 1772.172088] br0: port 1(dummy0) entered forwarding state
[ 1772.401127] dummy0: left allmulticast mode
[ 1772.401196] dummy0: left promiscuous mode
[ 1772.401265] br0: port 1(dummy0) entered disabled state