[ 1748.997692] br0: port 1(dummy0) entered blocking state
[ 1748.997742] br0: port 1(dummy0) entered disabled state
[ 1748.997785] dummy0: entered allmulticast mode
[ 1748.997837] dummy0: entered promiscuous mode
[ 1749.000255] br0: port 1(dummy0) entered blocking state
[ 1749.000291] br0: port 1(dummy0) entered forwarding state
[ 1749.183881] dummy0: left allmulticast mode
[ 1749.183976] dummy0: left promiscuous mode
[ 1749.184016] br0: port 1(dummy0) entered disabled state