[ 1805.209250] br0: port 1(dummy0) entered blocking state
[ 1805.209296] br0: port 1(dummy0) entered disabled state
[ 1805.209335] dummy0: entered allmulticast mode
[ 1805.209393] dummy0: entered promiscuous mode
[ 1805.212703] br0: port 1(dummy0) entered blocking state
[ 1805.212768] br0: port 1(dummy0) entered forwarding state
[ 1805.436523] dummy0: left allmulticast mode
[ 1805.436555] dummy0: left promiscuous mode
[ 1805.436588] br0: port 1(dummy0) entered disabled state