Keyed IPv6 Tunnel
draft-ietf-l2tpext-keyed-ipv6-tunnel-01

The information below is for an old version of the document
Document Type Active Internet-Draft (l2tpext WG)
Last updated 2014-10-24
Replaces draft-mkonstan-l2tpext-keyed-ipv6-tunnel
Stream IETF
Intended RFC status Informational
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Network Working Group                            M. Konstantynowicz, Ed.
Internet-Draft                                             G. Heron, Ed.
Intended status: Informational                             Cisco Systems
Expires: April 27, 2015                                    R. Schatzmayr
                                                     Deutsche Telekom AG
                                                           W. Henderickx
                                                    Alcatel-Lucent, Inc.
                                                        October 24, 2014

                           Keyed IPv6 Tunnel
                draft-ietf-l2tpext-keyed-ipv6-tunnel-01

Abstract

   This document describes a simple L2 Ethernet over IPv6 tunnel
   encapsulation with mandatory 64-bit key for connecting L2 Ethernet
   attachment circuits identified by IPv6 addresses.  The encapsulation
   is based on L2TPv3 over IP.

Requirements Language

   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 [RFC2119].

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

   Internet-Drafts are working documents of the Internet Engineering
   Task Force (IETF).  Note that other groups may also distribute
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   Drafts is at http://datatracker.ietf.org/drafts/current/.

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   This Internet-Draft will expire on April 27, 2015.

Copyright Notice

   Copyright (c) 2014 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

Konstantynowicz, et al.  Expires April 27, 2015                 [Page 1]
Internet-Draft                                              October 2014

   This document is subject to BCP 78 and the IETF Trust's Legal
   Provisions Relating to IETF Documents
   (http://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents
   carefully, as they describe your rights and restrictions with respect
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   include Simplified BSD License text as described in Section 4.e of
   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Static 1:1 Mapping Without a Control Plane  . . . . . . . . .   3
   3.  64-bit Cookie . . . . . . . . . . . . . . . . . . . . . . . .   3
   4.  Encapsulation . . . . . . . . . . . . . . . . . . . . . . . .   4
   5.  Fragmentation and Reassembly  . . . . . . . . . . . . . . . .   7
   6.  OAM Considerations  . . . . . . . . . . . . . . . . . . . . .   7
   7.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   8
   8.  Security Considerations . . . . . . . . . . . . . . . . . . .   8
   9.  Contributing Authors  . . . . . . . . . . . . . . . . . . . .   9
   10. Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .   9
   11. References  . . . . . . . . . . . . . . . . . . . . . . . . .   9
     11.1.  Normative References . . . . . . . . . . . . . . . . . .   9
     11.2.  Informative References . . . . . . . . . . . . . . . . .  10
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  10

1.  Introduction

   L2TPv3, as defined in RFC3931 [RFC3931], provides a dynamic mechanism
   for tunneling Layer 2 (L2) "circuits" across a packet-oriented data
   network (e.g., over IP), with multiple attachment circuits
   multiplexed over a single pair of IP address endpoints (i.e. a
   tunnel) using the L2TPv3 session ID as a circuit discriminator.

   Implementing L2TPv3 over IPv6 provides the opportunity to utilize
   unique IPv6 addresses to identify Ethernet attachment circuits
   directly, leveraging the key property that IPv6 offers, a vast number
   of unique IP addresses.  In this case, processing of the L2TPv3
   Session ID may be bypassed upon receipt as each tunnel has one and
   only one associated session.  This local optimization does not hinder
   the ability to continue supporting the multiplexing of circuits via
   the Session ID on the same router for other L2TPv3 tunnels.

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Internet-Draft                                              October 2014

2.  Static 1:1 Mapping Without a Control Plane

   Static local configuration creates a one-to-one mapping between the
   access-side L2 attachment circuit and the IP address used in the
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