[ 2049.311888][T20758] br0: port 1(dummy0) entered blocking state
[ 2049.312128][T20758] br0: port 1(dummy0) entered disabled state
[ 2049.312341][T20758] dummy0: entered allmulticast mode
[ 2049.313282][T20758] dummy0: entered promiscuous mode
[ 2049.337508][T20759] br0: port 1(dummy0) entered blocking state
[ 2049.337808][T20759] br0: port 1(dummy0) entered forwarding state
[ 2051.699021][   T12] dummy0: left allmulticast mode
[ 2051.699375][   T12] dummy0: left promiscuous mode
[ 2051.699607][   T12] br0: port 1(dummy0) entered disabled state