[ 1902.855940][  T869] br0: port 1(dummy0) entered blocking state
[ 1902.856358][  T869] br0: port 1(dummy0) entered disabled state
[ 1902.856520][  T869] dummy0: entered allmulticast mode
[ 1902.857373][  T869] dummy0: entered promiscuous mode
[ 1902.885863][  T870] br0: port 1(dummy0) entered blocking state
[ 1902.886166][  T870] br0: port 1(dummy0) entered forwarding state
[ 1904.784473][   T12] dummy0: left allmulticast mode
[ 1904.785605][   T12] dummy0: left promiscuous mode
[ 1904.785844][   T12] br0: port 1(dummy0) entered disabled state