[ 1606.220747] br0: port 1(dummy0) entered blocking state
[ 1606.220817] br0: port 1(dummy0) entered disabled state
[ 1606.220889] dummy0: entered allmulticast mode
[ 1606.220977] dummy0: entered promiscuous mode
[ 1606.223833] br0: port 1(dummy0) entered blocking state
[ 1606.223867] br0: port 1(dummy0) entered forwarding state
[ 1606.406332] dummy0: left allmulticast mode
[ 1606.406360] dummy0: left promiscuous mode
[ 1606.406392] br0: port 1(dummy0) entered disabled state