[ 1668.249657] br0: port 1(dummy0) entered blocking state
[ 1668.249698] br0: port 1(dummy0) entered disabled state
[ 1668.249733] dummy0: entered allmulticast mode
[ 1668.249781] dummy0: entered promiscuous mode
[ 1668.252693] br0: port 1(dummy0) entered blocking state
[ 1668.252754] br0: port 1(dummy0) entered forwarding state
[ 1668.445453] dummy0: left allmulticast mode
[ 1668.445543] dummy0: left promiscuous mode
[ 1668.445609] br0: port 1(dummy0) entered disabled state