[ 1749.644678] br0: port 1(dummy0) entered blocking state
[ 1749.644731] br0: port 1(dummy0) entered disabled state
[ 1749.644767] dummy0: entered allmulticast mode
[ 1749.644821] dummy0: entered promiscuous mode
[ 1749.647725] br0: port 1(dummy0) entered blocking state
[ 1749.647791] br0: port 1(dummy0) entered forwarding state
[ 1749.844936] dummy0: left allmulticast mode
[ 1749.844997] dummy0: left promiscuous mode
[ 1749.845027] br0: port 1(dummy0) entered disabled state