Layer Two Tunneling Protocol - Version 4 (L2TPv4)
draft-bhati-l2tpext-l2tpv4-00

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Internet Engineering Task Force                                A. Bhati
Internet Draft                                      Samsung Electronics
Intended status: Standards Track                       October 25, 2016
Expires: April 2017

             Layer Two Tunneling Protocol - Version 4 (L2TPv4)
                     draft-bhati-l2tpext-l2tpv4-00.txt

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Abstract

   This document describes the Layer Two Tunneling protocol (L2TPv4).
   L2TPv4 defines implementation friendly and more secured encapsulation
   headers for carrying multiple Layer 2 connections between two IP
   nodes.

Table of Contents

   1. Introduction...................................................4
      1.1. Changes from RFC 3931.....................................4
   2. Conventions used in this document..............................4
   3. L2TPv4 data packet header format...............................5
      3.1. Discussion................................................8
   4. L2TPv4 control packet header format............................9
      4.1. Discussion...............................................11
   5. Security Considerations.......................................12
   6. IANA Considerations...........................................12
   7. Conclusions...................................................12
   8. References....................................................13
      8.1. Normative References.....................................13
      8.2. Informative References...................................13
   9. Acknowledgments...............................................13
   Appendix A. Received Packet Processing...........................14
   Appendix B. Packet Header Encapsulation Processing...............17

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1. Introduction

   L2TP as originally defined in RFC 2661, is a standard method for
   tunneling Point-To-Point (PPP) [RFC 1661] sessions. L2TP is then
   modified in L2TPv3 for adoption of tunneling a number of other L2
   protocols. This document describes L2TPv4 encapsulation headers (for
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