[ 1664.386974] br0: port 1(dummy0) entered blocking state
[ 1664.387052] br0: port 1(dummy0) entered disabled state
[ 1664.387118] dummy0: entered allmulticast mode
[ 1664.387209] dummy0: entered promiscuous mode
[ 1664.389789] br0: port 1(dummy0) entered blocking state
[ 1664.389824] br0: port 1(dummy0) entered forwarding state
[ 1664.559367] dummy0: left allmulticast mode
[ 1664.559397] dummy0: left promiscuous mode
[ 1664.559422] br0: port 1(dummy0) entered disabled state