[ 2153.730040][T30847] br0: port 1(dummy0) entered blocking state
[ 2153.730231][T30847] br0: port 1(dummy0) entered disabled state
[ 2153.730389][T30847] dummy0: entered allmulticast mode
[ 2153.731236][T30847] dummy0: entered promiscuous mode
[ 2153.757377][T30848] br0: port 1(dummy0) entered blocking state
[ 2153.757582][T30848] br0: port 1(dummy0) entered forwarding state
[ 2155.751816][   T12] dummy0: left allmulticast mode
[ 2155.752014][   T12] dummy0: left promiscuous mode
[ 2155.752237][   T12] br0: port 1(dummy0) entered disabled state