Configuration guidelines
Configure PPP callback after completing the basic configuration of C-DCC or RS-DCC.
PPP callback implementation requires authentication. Hewlett Packard Enterprise recommends that you configure PAP or CHAP authentication on both physical and dialer interfaces on both callback client and server.
With dynamic route backup configured on an interface, only the dynamic route backup groups are used for dial. The interface does not accept incoming calls or outgoing calls. Therefore, do not configure dynamic route backup groups for interfaces with callback configured.