[ 1738.576565] br0: port 1(dummy0) entered blocking state
[ 1738.576635] br0: port 1(dummy0) entered disabled state
[ 1738.576700] dummy0: entered allmulticast mode
[ 1738.576783] dummy0: entered promiscuous mode
[ 1738.579526] br0: port 1(dummy0) entered blocking state
[ 1738.579564] br0: port 1(dummy0) entered forwarding state
[ 1738.770610] dummy0: left allmulticast mode
[ 1738.770641] dummy0: left promiscuous mode
[ 1738.770726] br0: port 1(dummy0) entered disabled state