[ 2423.842799][T20707] br0: port 1(dummy0) entered blocking state
[ 2423.843186][T20707] br0: port 1(dummy0) entered disabled state
[ 2423.843532][T20707] dummy0: entered allmulticast mode
[ 2423.844775][T20707] dummy0: entered promiscuous mode
[ 2423.879369][T20708] br0: port 1(dummy0) entered blocking state
[ 2423.879911][T20708] br0: port 1(dummy0) entered forwarding state
[ 2426.503223][   T12] dummy0: left allmulticast mode
[ 2426.504349][   T12] dummy0: left promiscuous mode
[ 2426.504708][   T12] br0: port 1(dummy0) entered disabled state