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Layer Two Tunnelling Protocol (L2TP) Over ATM Adaptation Layer 5 (AAL5) (RFC3355)

IP.com Disclosure Number: IPCOM000009615D
Original Publication Date: 2002-Aug-01
Included in the Prior Art Database: 2002-Sep-05
Document File: 14 page(s) / 25K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

D. Eastlake: AUTHOR [+2]

Abstract

The Layer Two Tunneling Protocol (L2TP) provides a standard method for transporting the link layer of the Point-to-Point Protocol (PPP) between a dial-up server and a Network Access Server, using a network connection in lieu of a physical point-to-point connection. This document describes the use of an Asynchronous Transfer Mode (ATM) network for the underlying network connection. ATM User-Network Interface (UNI) Signaling Specification Version 4.0 or Version 3.1 with ATM Adaptation Layer 5 (AAL5) are supported as interfaces to the ATM network.

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Network Working Group� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � A. Singh

Request for Comments: 3355� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � Motorola

Category: Standards Track� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � R. Turner

� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � Paradyne

� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � R. Tio

� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � S. Nanji

� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � Redback Networks

� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � August 2002

� � � � � � � � � � � � � � � � � Layer Two Tunnelling Protocol (L2TP)

� � � � � � � � � � � � � � � � � � Over ATM Adaptation Layer 5 (AAL5)

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 Layer Two Tunneling Protocol (L2TP) provides a standard method

� � for transporting the link layer of the Point-to-Point Protocol (PPP)

� � between a dial-up server and a Network Access Server, using a network

� � connection in lieu of a physical point-to-point connection.� This

� � document describes the use of an Asynchronous Transfer Mode (ATM)

� � network for the underlying network connection.� ATM User-Network

� � Interface (UNI) Signaling Specification Version 4.0 or Version 3.1

� � with ATM Adaptation Layer 5 (AAL5) are supported as interfaces to the

� � ATM network.

Applicability

� � This specification is intended for implementations of L2TP that use

� � ATM to provide the communications link between the L2TP Access

� � Concentrator and the L2TP Network Server.

Singh, et. al.� � � � � � � � � � � � � Standards Track� � � � � � � � � � � � � � � � � � � � [Page 1]

RFC 3355� � � � � � � � � � � � � � � � � � � � L2TP Over AAL5� � � � � � � � � � � � � � � � � August 2002

1. Introduction

� � The Point-to-Point Protocol (PPP) [RFC1661], is frequently used on

� � the link between a personal computer with a dial modem and a network

� � service provider, or NSP.� The Layer Two Tunneling Protocol (L2TP)

� � [RFC2661] enables a dial-up server to provide access to a remote NSP

� � by extending the PPP connection through a tunnel in a network to

� � which...