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Transport of Ethernet Frames over Layer 2 Tunneling Protocol Version 3 (L2TPv3)
RFC 4719

Document type: RFC - Proposed Standard (November 2006; No errata)
Updated by RFC 5641
Document stream: IETF
Last updated: 2013-03-02
Other versions: plain text, pdf, html

IETF State: WG Document
Consensus: Unknown
Document shepherd: No shepherd assigned

IESG State: RFC 4719 (Proposed Standard)
Responsible AD: Jari Arkko
Send notices to: l2tpext-chairs@tools.ietf.org

Network Working Group                                   R. Aggarwal, Ed.
Request for Comments: 4719                              Juniper Networks
Category: Standards Track                               M. Townsley, Ed.
                                                      M. Dos Santos, Ed.
                                                           Cisco Systems
                                                           November 2006

                   Transport of Ethernet Frames over
             Layer 2 Tunneling Protocol Version 3 (L2TPv3)

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 IETF Trust (2006).

Abstract

   This document describes the transport of Ethernet frames over the
   Layer 2 Tunneling Protocol, Version 3 (L2TPv3).  This includes the
   transport of Ethernet port-to-port frames as well as the transport of
   Ethernet VLAN frames.  The mechanism described in this document can
   be used in the creation of Pseudowires to transport Ethernet frames
   over an IP network.

Aggarwal, et al.            Standards Track                     [Page 1]
RFC 4719        Transport of Ethernet Frames over L2TPv3   November 2006

Table of Contents

   1. Introduction ....................................................2
      1.1. Specification of Requirements ..............................2
      1.2. Abbreviations ..............................................3
      1.3. L2TPv3 Control Message Types ...............................3
      1.4. Requirements ...............................................3
   2. PW Establishment ................................................4
      2.1. LCCE-LCCE Control Connection Establishment .................4
      2.2. PW Session Establishment ...................................4
      2.3. PW Session Monitoring ......................................6
   3. Packet Processing ...............................................7
      3.1.  Encapsulation .............................................7
      3.2.  Sequencing ................................................7
      3.3.  MTU Handling ..............................................7
   4. Applicability Statement .........................................8
   5. Congestion Control .............................................10
   6. Security Considerations ........................................10
   7. IANA Considerations ............................................11
   8. Contributors ...................................................11
   9. Acknowledgements ...............................................11
   10. References ....................................................12
      10.1. Normative References .....................................12
      10.2. Informative References ...................................12

1.  Introduction

   The Layer 2 Tunneling Protocol, Version 3 (L2TPv3) can be used as a
   control protocol and for data encapsulation to set up Pseudowires
   (PWs) for transporting layer 2 Packet Data Units across an IP network
   [RFC3931].  This document describes the transport of Ethernet frames
   over L2TPv3 including the PW establishment and data encapsulation.

   The term "Ethernet" in this document is used with the intention to
   include all such protocols that are reasonably similar in their
   packet format to IEEE 802.3 [802.3], including variants or extensions
   that may or may not necessarily be sanctioned by the IEEE (including
   such frames as jumbo frames, etc.).  The term "VLAN" in this document
   is used with the intention to include all virtual LAN tagging
   protocols such as IEEE 802.1Q [802.1Q], 802.1ad [802.1ad], etc.

1.1.  Specification of Requirements

   In this document, several words are used to signify the requirements
   of the specification.  These words are often capitalized.  The key
   words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD",
   "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this document
   are to be interpreted as described in [RFC2119].

Aggarwal, et al.            Standards Track                     [Page 2]
RFC 4719        Transport of Ethernet Frames over L2TPv3   November 2006

1.2.  Abbreviations

   AC      Attachment Circuit (see [RFC3985])

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