[ 1740.487561] br0: port 1(dummy0) entered blocking state
[ 1740.487603] br0: port 1(dummy0) entered disabled state
[ 1740.487640] dummy0: entered allmulticast mode
[ 1740.487696] dummy0: entered promiscuous mode
[ 1740.491163] br0: port 1(dummy0) entered blocking state
[ 1740.491197] br0: port 1(dummy0) entered forwarding state
[ 1740.742444] dummy0: left allmulticast mode
[ 1740.742545] dummy0: left promiscuous mode
[ 1740.742608] br0: port 1(dummy0) entered disabled state