[ 1973.845057][T11941] br0: port 1(dummy0) entered blocking state
[ 1973.845253][T11941] br0: port 1(dummy0) entered disabled state
[ 1973.845410][T11941] dummy0: entered allmulticast mode
[ 1973.846432][T11941] dummy0: entered promiscuous mode
[ 1973.869380][T11942] br0: port 1(dummy0) entered blocking state
[ 1973.869695][T11942] br0: port 1(dummy0) entered forwarding state
[ 1975.815286][   T12] dummy0: left allmulticast mode
[ 1975.816247][   T12] dummy0: left promiscuous mode
[ 1975.816480][   T12] br0: port 1(dummy0) entered disabled state