[ 2435.936284][T20190] br0: port 1(dummy0) entered blocking state
[ 2435.936595][T20190] br0: port 1(dummy0) entered disabled state
[ 2435.936875][T20190] dummy0: entered allmulticast mode
[ 2435.938419][T20190] dummy0: entered promiscuous mode
[ 2435.968744][T20191] br0: port 1(dummy0) entered blocking state
[ 2435.969247][T20191] br0: port 1(dummy0) entered forwarding state
[ 2438.317191][   T12] dummy0: left allmulticast mode
[ 2438.318364][   T12] dummy0: left promiscuous mode
[ 2438.318696][   T12] br0: port 1(dummy0) entered disabled state