[ 1740.537265] br0: port 1(dummy0) entered blocking state
[ 1740.537300] br0: port 1(dummy0) entered disabled state
[ 1740.537335] dummy0: entered allmulticast mode
[ 1740.537381] dummy0: entered promiscuous mode
[ 1740.540145] br0: port 1(dummy0) entered blocking state
[ 1740.540206] br0: port 1(dummy0) entered forwarding state
[ 1740.717113] dummy0: left allmulticast mode
[ 1740.717176] dummy0: left promiscuous mode
[ 1740.717237] br0: port 1(dummy0) entered disabled state