RFC 3337 (rfc3337) - Page 1 of 7


Class Extensions for PPP over Asynchronous Transfer Mode Adaptation Layer 2



Alternative Format: Original Text Document



Network Working Group                                        B. Thompson
Request for Comments: 3337                                      T. Koren
Category: Standards Track                                  Cisco Systems
                                                               B. Buffam
                                                         Seaway Networks
                                                           December 2002


                     Class Extensions for 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) over Asynchronous Transfer Mode
   (ATM) Adaptation Layer 2 defines the encapsulation that allows a PPP
   session to be transported over an ATM virtual circuit using the ATM
   Adaptation Layer 2 (AAL2) adaptation layer.  This document defines a
   set of class extensions to PPP over AAL2 that implement equivalent
   functionality to Multi Class Multi Link PPP over a single ATM virtual
   circuit.  Instead of using Multi Link PPP as the basis for
   fragmentation functionality, this document uses the functionality of
   the Segmentation and Reassembly Service Specific Convergence Sublayer
   that is already required as the basic encapsulation format of PPP
   over AAL2.

1. Introduction

   Using AAL2 as an adaptation layer for PPP transport over ATM provides
   a bandwidth efficient transport for IP applications that generate
   small packets.  An example IP application that generates small
   packets is RTP encapsulated voice (Voice over IP).








Thompson, et. al.           Standards Track