[ 1680.880442] br0: port 1(dummy0) entered blocking state
[ 1680.880493] br0: port 1(dummy0) entered disabled state
[ 1680.880524] dummy0: entered allmulticast mode
[ 1680.880586] dummy0: entered promiscuous mode
[ 1680.883305] br0: port 1(dummy0) entered blocking state
[ 1680.883375] br0: port 1(dummy0) entered forwarding state
[ 1681.063427] dummy0: left allmulticast mode
[ 1681.063501] dummy0: left promiscuous mode
[ 1681.063560] br0: port 1(dummy0) entered disabled state