Browse Prior Art Database

PPP Gandalf FZA Compression Protocol (RFC1993)

IP.com Disclosure Number: IPCOM000004269D
Original Publication Date: 1996-Aug-01
Included in the Prior Art Database: 2000-Sep-13
Document File: 5 page(s) / 9K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

A. Barbir: 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 33% of the total text.

Network Working Group A. Barbir

Request for Comments: 1993 Gandalf

Category: Informational D. Carr

Newbridge

W. Simpson

DayDreamer

August 1996

PPP Gandalf FZA Compression Protocol

Status of this Memo

This memo provides information for the Internet community. It does

not specify an Internet standard. 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.

The PPP Compression Control Protocol [2] provides a method to

negotiate and utilize compression protocols over PPP encapsulated

links.

This document describes the use of the Gandalf FZA data compression

algorithm [3] for compressing PPP encapsulated packets.

Table of Contents

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

1.1 Licensing ....................................... 1

2. FZA Packets ........................................... 2

2.1 Packet Format ................................... 3

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

SECURITY CONSIDERATIONS ...................................... 4

ACKNOWLEDGEMENTS ............................................. 5

REFERENCES ................................................... 5

CONTACTS ..................................................... 5

Barbir, Carr & Simpson [Page i]

RFC 1993 Gandalf FZA August 1996

1. Introduction

FZA is a high performance LZ [4] derivative that maximizes

compression at the expense of memory and CPU. Compression

performance can be adjusted based on CPU and memory available.

Multiple PPP packets can be combined in a single compressed frame, or

a single PPP packet can be spread across multiple frames.

1.1. Licensing

Source and object licenses are available on a non-discriminatory

basis for either a royalty or fixed price arrangement. Patent

indemnity is included with the license.

2. FZA Packets

Before any FZA packets may be communicated, PPP must reach the

Network-Layer Protocol phase.

When the Compression Control Protocol (CCP) has reached the Opened

state, and FZA is negotiated as the primary compression algorithm,

the PPP Protocol field indicates type hex 00FB (link compressed

datagram), or type hex 00FD (compressed datagram).

The maximum length of the FZA datagram transmitted over a PPP link is

the same as the maximum length of the Information field of a PPP

encapsulated pa...