Link Control Protocol (LCP)

Link Control Protocol (LCP) is responsible for establishing, maintaining, configuring and terminating links. It also provides negotiation mechanisms to set options between two endpoints. All LCP packets are carried in PPP frames’ payload or data field. The value of the protocol field for the LCP packet is C021₁₀.

Link Configuration: The process of setting up and negotiating the parameters of a link.

Link Maintenance: The process of managing an opened link.

Link Termination: The closing of an existing link when it is no longer needed.