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Point-to-Point Protocol for the transmission of multi-protocol datagrams over Point-to-Point links (RFC1171)

IP.com Disclosure Number: IPCOM000001984D
Original Publication Date: 1990-Jul-01
Included in the Prior Art Database: 2019-Feb-11
Document File: 51 page(s) / 55K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

D. Perkins: AUTHOR

Related Documents

10.17487/RFC1171: DOI

Abstract

This memo specifies the Point-to-Point Protocol (PPP) as a Draft Standard Protocol for the Internet community. When it becomes a full Standard, this protocol will be recommended for all TCP/IP implementations that communicate over serial links.

This text was extracted from a PDF file.
This is the abbreviated version, containing approximately 5% of the total text.

Network Working Group D. Perkins Request for Comments: 1171 CMU Obsoletes: RFC 1134 July 1990

The Point-to-Point Protocol for the Transmission of Multi-Protocol Datagrams Over Point-to-Point Links

Status of this Memo

This RFC specifies an IAB standards track protocol for the Internet community.

Please refer to the current edition of the "IAB Official Protocol Standards" for the standardization state and status of this protocol.

This proposal is the product of the Point-to-Point Protocol Working Group of the Internet Engineering Task Force (IETF). Comments on this memo should be submitted to the IETF Point-to-Point Protocol Working Group chair.

Distribution of this memo is unlimited.

Abstract

The Point-to-Point Protocol (PPP) provides a method for transmitting datagrams over serial point-to-point links. PPP is composed of three parts:

1. A method for encapsulating datagrams over serial links.

2. An extensible Link Control Protocol (LCP).

3. A family of Network Control Protocols (NCP) for establishing and configuring different network-layer protocols.

This document defines the encapsulation scheme, the basic LCP, and an NCP for establishing and configuring the Internet Protocol (IP) (called the IP Control Protocol, IPCP).

The options and facilities used by the LCP and the IPCP are defined in separate documents. Control protocols for configuring and utilizing other network-layer protocols besides IP (e.g., DECNET, OSI) are expected to be developed as needed.

Perkins [Page i]

RFC 1171 Point-to-Point Protocol July 1990

Table of Contents

1. Introduction .......................................... 1 1.1 Motivation ...................................... 1 1.2 Overview of PPP ................................. 1 1.3 Organization of the document .................... 2

2. Physical Layer Requirements ........................... 3

3. The Data Link Layer ................................... 4 3.1 Frame Format .................................... 5

4. The PPP Link Control Protocol (LCP) ................... 9 4.1 The LCP Automaton ............................... 11 4.1.1 Overview ........................................ 11 4.1.2 State Diagram ................................... 11 4.1.3 State Transition Table .......................... 13 4.1.4 Events .......................................... 13 4.1.5 Actions ......................................... 16 4.1.6 States .......................................... 17 4.2 Loop Avoidance .................................. 20 4.3 Timers and Counters ............................. 20 4.4 Packet Format ................................... 21 4.4.1 Configure-Request ............................... 23 4.4.2 Configure-Ack ................................... 24 4.4.3 Configure-Nak ................................... 25 4.4.4 Configure-Reject ................................ 27 4.4.5 Terminate-Request and Terminate-Ack ............. 29 4.4.6 Code-Reject ..................................... 31 4.4.7 Protocol-Reject ...............

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