Embodiments of this disclosure provide a communication method and apparatus, and relate to the field of communication technologies. The method includes: A first communication apparatus receives first traffic-associated information transmitted through a first path, and adjusts (or determines), based on the first traffic-associated information, a first service processing policy corresponding to a first service. Because the first path is a path for transmitting a service flow, the first communication apparatus can obtain the first traffic-associated information earlier, so that the first communication apparatus can adjust the first service processing policy in a more timely manner.