Browse Prior Art Database

PPP Reliable Transmission (RFC1663)

IP.com Disclosure Number: IPCOM000002499D
Original Publication Date: 1994-Jul-01
Included in the Prior Art Database: 2000-Sep-12
Document File: 7 page(s) / 16K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

D. Rand: AUTHOR

Abstract

The Point-to-Point Protocol (PPP) [1] provides a standard method for transporting multi-protocol datagrams over point-to-point links.

This text was extracted from a ASCII Text document.
This is the abbreviated version, containing approximately 18% of the total text.

Network Working Group D. Rand

Request for Comments: 1663 Novell

Category: Standards Track July 1994

PPP Reliable Transmission

Status of this Memo

This document specifies an Internet standards track protocol for the

Internet community, and requests discussion and suggestions for

improvements. Please refer to the current edition of the "Internet

Official Protocol Standards" (STD 1) for the standardization state

and status of this protocol. Distribution of this memo is unlimited.

Abstract

The Point-to-Point Protocol (PPP) [1] provides a standard method for

transporting multi-protocol datagrams over point-to-point links.

This document defines a method for negotiating and using Numbered-

Mode, as defined by ISO 7776 [2], to provide a reliable serial link.

This document is the product of the Point-to-Point Protocol Working

Group of the Internet Engineering Task Force (IETF). Comments should

be submitted to the ietf-ppp@ucdavis.edu mailing list.

Table of Contents

1. Introduction .......................................... 1

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

3. The Data Link Layer ................................... 2

3.1 Frame Format ....................................... 2

4. Configuration Option Format ........................... 4

5. Numbered-Mode Operation ............................... 5

5.1 Single Link ........................................ 6

5.2 Inverse Multiplexing ............................... 6

5.3 Using Multi-Link Procedure... ...................... 7

5.4 LAPB Parameter defaults ............................ 8

SECURITY CONSIDERATIONS ...................................... 9

REFERENCES ................................................... 9

ACKNOWLEDGEMENTS ............................................. 9

CHAIR'S ADDRESS .............................................. 10

AUTHOR'S ADDRESS ............................................. 10

1. Introduction

By default, PPP packets over HDLC framed links consist of

"connectionless" datagrams. If reliable transmission over the HDLC

link is desired, the implementation MUST specify the Numbered-Mode

Configuration Option during Link Establishment phase.

Generally, serial link reliability is not a major issue. The

architecture of protocols used in datagram networking presume

best-effort non-sequential delivery. When errors are detected,

datagrams

are discarded.

However, in certain circumstances, it is advisable to provide a

reliable link, at least for a subset of the messages. The most

obvious case is when the link is compressed. Since the dictionary is

recovered from the compressed data stream, and a lost datagram

corrupts the dictionary, datagrams must not be lost. ...