Establishing PPP over the Physical Connection

Once the physical connection is established, the two endpoints negotiate to define a common configuration for the PPP layer. For synchronous connections, the PPP layer is established each time you start Solstice PPP on your machine. For asynchronous connections, the PPP layer is established each time you initiate a call to a remote host.

During the PPP negotiation phase, the endpoints exchange Link Control Protocol (LCP) frames that contain information regarding the desired configuration and the supported protocol options. Negotiated parameters include the use of compression algorithms to improve performance over slow connections, and the use of authentication protocols to protect against unauthorized access. The policy is to converge the negotiation, if at all possible; however, if the two endpoints fail to agree on a common configuration, the link is closed automatically.