Browse Prior Art Database

PPP in HDLC-like Framing (RFC1662)

IP.com Disclosure Number: IPCOM000002498D
Original Publication Date: 1994-Jul-01
Included in the Prior Art Database: 2000-Sep-12
Document File: 20 page(s) / 46K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

W. Simpson: AUTHOR [+2]

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 6% of the total text.

Network Working Group W. Simpson, Editor

Request for Comments: 1662 Daydreamer

STD: 51 July 1994

Obsoletes: 1549

Category: Standards Track

PPP in HDLC-like Framing

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 describes the use of HDLC-like framing for PPP

encapsulated packets.

Table of Contents

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

1.1 Specification of Requirements ................... 2

1.2 Terminology ..................................... 2

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

3. The Data Link Layer ................................... 4

3.1 Frame Format .................................... 5

3.2 Modification of the Basic Frame ................. 7

4. Octet-stuffed framing ................................. 8

4.1 Flag Sequence ................................... 8

4.2 Transparency .................................... 8

4.3 Invalid Frames .................................. 9

4.4 Time Fill ....................................... 9

4.4.1 Octet-synchronous ............................... 9

4.4.2 Asynchronous .................................... 9

4.5 Transmission Considerations ..................... 10

4.5.1 Octet-synchronous ............................... 10

4.5.2 Asynchronous .................................... 10

Simpson [Page i]

RFC 1662 HDLC-like Framing July 1994

5. Bit-stuffed framing ................................... 11

5.1 Flag Sequence ................................... 11

5.2 Transparency .................................... 11

5.3 Invalid Frames .................................. 11

5.4 Time Fill ....................................... 11

5.5 Transmission Considerations ..................... 12

6. Asynchronous to Synchronous Conversion ................ 13

7. Additional LCP Configuration Options .................. 14

7.1 Async-Control-Character-Map (ACCM) .............. 14

APPENDICES ............................................