[ 1671.231852] br0: port 1(dummy0) entered blocking state
[ 1671.231916] br0: port 1(dummy0) entered disabled state
[ 1671.231985] dummy0: entered allmulticast mode
[ 1671.232067] dummy0: entered promiscuous mode
[ 1671.234830] br0: port 1(dummy0) entered blocking state
[ 1671.234864] br0: port 1(dummy0) entered forwarding state
[ 1671.415641] dummy0: left allmulticast mode
[ 1671.415697] dummy0: left promiscuous mode
[ 1671.415802] br0: port 1(dummy0) entered disabled state