[ 1604.087816] br0: port 1(dummy0) entered blocking state
[ 1604.087890] br0: port 1(dummy0) entered disabled state
[ 1604.087967] dummy0: entered allmulticast mode
[ 1604.088054] dummy0: entered promiscuous mode
[ 1604.090963] br0: port 1(dummy0) entered blocking state
[ 1604.090996] br0: port 1(dummy0) entered forwarding state
[ 1604.285417] dummy0: left allmulticast mode
[ 1604.285447] dummy0: left promiscuous mode
[ 1604.285486] br0: port 1(dummy0) entered disabled state