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PPP Over Asynchronous Transfer Mode Adaptation Layer 2 (AAL2) (RFC3336)

IP.com Disclosure Number: IPCOM000010532D
Original Publication Date: 2002-Dec-01
Included in the Prior Art Database: 2002-Dec-13
Document File: 17 page(s) / 34K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

B. Thompson: AUTHOR [+3]

Abstract

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

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 8% of the total text.

Network Working Group                                        B. Thompson

Request for Comments: 3336                                      T. Koren

Category: Standards Track                                  Cisco Systems

                                                               B. Buffam

                                                         Seaway Networks

                                                           December 2002

     PPP Over Asynchronous Transfer Mode Adaptation Layer 2 (AAL2)

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.

Copyright Notice

   Copyright (C) The Internet Society (2002).  All Rights Reserved.

Abstract

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

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

   This document describes the use of ATM Adaptation Layer 2 (AAL2) for

   framing PPP encapsulated packets.

Applicability

   This specification is intended for those implementations which desire

   to use the facilities which are defined for PPP, such as the Link

   Control Protocol, Network-layer Control Protocols, authentication,

   and compression.  These capabilities require a point-to-point

   relationship between the peers, and are not designed for the multi-

   point relationships which are available in ATM and other multi-access

   environments.

Thompson, et. al.           Standards Track                     [Page 1]

RFC 3336                     PPP Over AAL2                 December 2002

1. Introduction

   PPP over AAL5 [2] describes the encapsulation format and operation of

   PPP when used with the ATM AAL5 adaptation layer.  While this

   encapsulation format is well suited to PPP transport of IP, it is

   bandwidth inefficient when used for transporting small payloads such

   as voice.  PPP over AAL5 is especially bandwidth inefficient when

   used with RTP header compression [3].

   PPP over AAL2 addresses the bandwidth efficiency issues of PPP over

   AAL5 for small packet transport by making use of the AAL2 Common Part

   Sublayer (CPS) [4] to allow multiple PPP payloads to be multiplexed

   into a set of ATM cells.

2. Conventions

   The keywords MUST, MUST NOT, REQUIRED, SHALL, SHALL NOT, SHOULD,

   SHOULD NOT, RECOMMENDED, MAY, and OPTIONAL, when they appear in this

   d...