[ 1596.143497] br0: port 1(dummy0) entered blocking state
[ 1596.143575] br0: port 1(dummy0) entered disabled state
[ 1596.143643] dummy0: entered allmulticast mode
[ 1596.143727] dummy0: entered promiscuous mode
[ 1596.146618] br0: port 1(dummy0) entered blocking state
[ 1596.146679] br0: port 1(dummy0) entered forwarding state
[ 1596.331918] dummy0: left allmulticast mode
[ 1596.331956] dummy0: left promiscuous mode
[ 1596.331987] br0: port 1(dummy0) entered disabled state