This application provides a communication method and a communications device. The method includes: obtaining a media access control (MAC) address that is of a terminal device and that is bound to a session and first route information of an interface, corresponding to the session, between a user plane function network element and a data network; and sending, to an application function network element or a gateway of the data network, the MAC address that is of the terminal device and that is bound to the session and the first route information.