[ 1684.602275] br0: port 1(dummy0) entered blocking state
[ 1684.602350] br0: port 1(dummy0) entered disabled state
[ 1684.602418] dummy0: entered allmulticast mode
[ 1684.602508] dummy0: entered promiscuous mode
[ 1684.605305] br0: port 1(dummy0) entered blocking state
[ 1684.605339] br0: port 1(dummy0) entered forwarding state
[ 1684.790400] dummy0: left allmulticast mode
[ 1684.790439] dummy0: left promiscuous mode
[ 1684.790529] br0: port 1(dummy0) entered disabled state