[ 2135.872688][T13712] br0: port 1(dummy0) entered blocking state
[ 2135.872932][T13712] br0: port 1(dummy0) entered disabled state
[ 2135.873157][T13712] dummy0: entered allmulticast mode
[ 2135.874133][T13712] dummy0: entered promiscuous mode
[ 2135.900558][T13713] br0: port 1(dummy0) entered blocking state
[ 2135.900742][T13713] br0: port 1(dummy0) entered forwarding state
[ 2138.347120][   T12] dummy0: left allmulticast mode
[ 2138.350020][   T12] dummy0: left promiscuous mode
[ 2138.350279][   T12] br0: port 1(dummy0) entered disabled state