This application provides a communication method and a communication apparatus. In this method, a session management function network element obtains routing information corresponding to a second data network access identifier, obtains an address of an edge application server corresponding to a service accessed by a terminal device; determines the second data network access identifier based on the address of the edge application server; determines, based on the routing information corresponding to the second data network access identifier, a packet processing rule corresponding to the server, and sends the packet processing rule to a user plane function network element.