Outgoing PPP connections

``Setting up an outgoing PPP connection'' shows the steps in setting up an outgoing PPP connection.

Setting up an outgoing PPP connection

1. The local system selects a bundle that can be used to connect to the remote site. This is in response to the pppattach(1M) command (manual bringup) being run, or to a networking application needing to communicate with the remote site (``on demand'' or automatic bringup). The chosen bundle specifies a list of link devices that can be used for the connection.

2. The local system uses each available device in turn to dial the remote site until it answers the call. The remote site may require that the local system authenticate itself by logging in.

3. Having established a physical connection, the device being used for the link has now been determined. Multilink PPP may add more devices from those defined for the bundle.

4. The systems negotiate LCP, CCP, and IP parameters to establish the PPP link. See ``Examine PPP negotiation in the log file'' for more information about the stages of PPP negotiation. As part of the negotiation, the systems may also authenticate each other using the Password Authentication Protocol (PAP) or the Challenge-Handshake Authentication Protocol (CHAP).