[ 1878.402508] br0: port 1(dummy0) entered blocking state
[ 1878.402599] br0: port 1(dummy0) entered disabled state
[ 1878.402666] dummy0: entered allmulticast mode
[ 1878.402752] dummy0: entered promiscuous mode
[ 1878.406486] br0: port 1(dummy0) entered blocking state
[ 1878.406519] br0: port 1(dummy0) entered forwarding state
[ 1878.661903] dummy0: left allmulticast mode
[ 1878.661952] dummy0: left promiscuous mode
[ 1878.662033] br0: port 1(dummy0) entered disabled state