[ 1856.779436] br0: port 1(dummy0) entered blocking state
[ 1856.779498] br0: port 1(dummy0) entered disabled state
[ 1856.779549] dummy0: entered allmulticast mode
[ 1856.779612] dummy0: entered promiscuous mode
[ 1856.783335] br0: port 1(dummy0) entered blocking state
[ 1856.783381] br0: port 1(dummy0) entered forwarding state
[ 1857.094642] dummy0: left allmulticast mode
[ 1857.094708] dummy0: left promiscuous mode
[ 1857.094747] br0: port 1(dummy0) entered disabled state