[ 1753.478505] br0: port 1(dummy0) entered blocking state
[ 1753.478541] br0: port 1(dummy0) entered disabled state
[ 1753.478575] dummy0: entered allmulticast mode
[ 1753.478630] dummy0: entered promiscuous mode
[ 1753.481340] br0: port 1(dummy0) entered blocking state
[ 1753.481374] br0: port 1(dummy0) entered forwarding state
[ 1753.663867] dummy0: left allmulticast mode
[ 1753.663898] dummy0: left promiscuous mode
[ 1753.663989] br0: port 1(dummy0) entered disabled state