[ 1971.328051][T12899] br0: port 1(dummy0) entered blocking state
[ 1971.328235][T12899] br0: port 1(dummy0) entered disabled state
[ 1971.328397][T12899] dummy0: entered allmulticast mode
[ 1971.329786][T12899] dummy0: entered promiscuous mode
[ 1971.352062][T12900] br0: port 1(dummy0) entered blocking state
[ 1971.352358][T12900] br0: port 1(dummy0) entered forwarding state
[ 1973.340304][   T68] dummy0: left allmulticast mode
[ 1973.341330][   T68] dummy0: left promiscuous mode
[ 1973.341774][   T68] br0: port 1(dummy0) entered disabled state