CCIE RS – L2 WAN Circuit Technology – Implement and Troubleshoot PPP

Point to Point Protocol

  • Layer 2 protocol for p2p links
  • Adds capabilities for authentication, multilink
  • Provides standard method for transporting mutli-protocol datagrams over p2p links
  • Link Control Protocol (LCP) – Establishing, configuring and testing the data link connectivity
  • Network Control Protoocols (NCP) – establishing and configuring different network layer protocols

IPCP (IP Configuration Protocol)

  • Sub-protocol of PPP
  • Assign IP from a PPP server
  • IP address negotiated

RFC 1661

Phase diagram

Configuration

Interface [#]
 Encapsulation ppp

Debug ppp negotiation
PPP Compression

Config
Compress > under interface

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