[ 1881.519024][ T9500] br0: port 1(dummy0) entered blocking state
[ 1881.519236][ T9500] br0: port 1(dummy0) entered disabled state
[ 1881.519414][ T9500] dummy0: entered allmulticast mode
[ 1881.520334][ T9500] dummy0: entered promiscuous mode
[ 1881.542083][ T9501] br0: port 1(dummy0) entered blocking state
[ 1881.542430][ T9501] br0: port 1(dummy0) entered forwarding state
[ 1883.396027][   T68] dummy0: left allmulticast mode
[ 1883.396193][   T68] dummy0: left promiscuous mode
[ 1883.396415][   T68] br0: port 1(dummy0) entered disabled state