[ 2254.889430][T21381] br0: port 1(dummy0) entered blocking state
[ 2254.889649][T21381] br0: port 1(dummy0) entered disabled state
[ 2254.889868][T21381] dummy0: entered allmulticast mode
[ 2254.890942][T21381] dummy0: entered promiscuous mode
[ 2254.917065][T21382] br0: port 1(dummy0) entered blocking state
[ 2254.917302][T21382] br0: port 1(dummy0) entered forwarding state
[ 2257.331051][   T12] dummy0: left allmulticast mode
[ 2257.331797][   T12] dummy0: left promiscuous mode
[ 2257.332099][   T12] br0: port 1(dummy0) entered disabled state