Configuring CPE attributes

CPE attributes include CPE username and password, which a CPE uses to authenticate an ACS. When an ACS initiates a connection to a CPE, the ACS sends a session request carrying the CPE URL, username, and password. When the switch (CPE) receives the request, it compares the CPE URL, username, and password with those configured locally. If they are the same, the ACS passes the authentication of the CPE, and the connection establishment proceeds. Otherwise, the authentication fails, and the connection establishment is terminated.