[ 1871.997010] br0: port 1(dummy0) entered blocking state
[ 1871.997046] br0: port 1(dummy0) entered disabled state
[ 1871.997081] dummy0: entered allmulticast mode
[ 1871.997136] dummy0: entered promiscuous mode
[ 1872.000569] br0: port 1(dummy0) entered blocking state
[ 1872.000632] br0: port 1(dummy0) entered forwarding state
[ 1872.262101] dummy0: left allmulticast mode
[ 1872.262133] dummy0: left promiscuous mode
[ 1872.262166] br0: port 1(dummy0) entered disabled state