IPv6 Support for Generic Routing Encapsulation (GRE)
draft-ietf-intarea-gre-ipv6-01

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Last updated 2015-02-05
Replaces draft-pignataro-intarea-gre-ipv6
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Intarea Working Group                                       C. Pignataro
Internet-Draft                                             Cisco Systems
Updates: 2784 (if approved)                                    R. Bonica
Intended status: Standards Track                        Juniper Networks
Expires: August 10, 2015                                     S. Krishnan
                                                                Ericsson
                                                       February 06, 2015

          IPv6 Support for Generic Routing Encapsulation (GRE)
                     draft-ietf-intarea-gre-ipv6-01

Abstract

   Generic Routing Encapsulation (GRE) can be used to carry any network-
   layer payload protocol over any network-layer delivery protocol.  GRE
   procedures are specified for IPv4, used as either the payload or
   delivery protocol.  However, GRE procedures are not specified for
   IPv6.

   This document specifies GRE procedures for IPv6, used as either the
   payload or delivery protocol.  It updates the GRE specification, RFC
   2784.

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].

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/.

   Internet-Drafts are draft documents valid for a maximum of six months
   and may be updated, replaced, or obsoleted by other documents at any
   time.  It is inappropriate to use Internet-Drafts as reference
   material or to cite them other than as "work in progress."

   This Internet-Draft will expire on August 10, 2015.

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Copyright Notice

   Copyright (c) 2015 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

   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
   to this document.  Code Components extracted from this document must
   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
     1.1.  Terminology . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  GRE Header Fields . . . . . . . . . . . . . . . . . . . . . .   3
     2.1.  Checksum Present  . . . . . . . . . . . . . . . . . . . .   3
     2.2.  Protocol Type . . . . . . . . . . . . . . . . . . . . . .   3
   3.  IPv6 as a GRE Payload . . . . . . . . . . . . . . . . . . . .   4
     3.1.  MTU Considerations  . . . . . . . . . . . . . . . . . . .   4
   4.  IPv6 as a GRE Delivery Protocol . . . . . . . . . . . . . . .   5
     4.1.  MTU Considerations  . . . . . . . . . . . . . . . . . . .   5
   5.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   5
   6.  Security Considerations . . . . . . . . . . . . . . . . . . .   5
   7.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .   6
   8.  Normative References  . . . . . . . . . . . . . . . . . . . .   6
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   6

1.  Introduction

   Generic Routing Encapsulation (GRE) [RFC2784] [RFC2890] can be used
   to carry any network-layer payload protocol over any network-layer
   delivery protocol.  GRE procedures are specified for IPv4 [RFC0791],
   used as either the payload or delivery protocol.  However, GRE
   procedures are not specified for IPv6 [RFC2460].

   This document specifies GRE procedures for IPv6, used as either the
   payload or delivery protocol.  It updates RFC 2784 [RFC2784].  Like
   RFC 2784, this specification describes GRE how GRE has been
   implemented for IPv6 by several vendors.

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1.1.  Terminology

   The following terms are specific to GRE and are taken from [RFC2784]:

   o  GRE delivery header - an IPv4 or IPv6 header whose source address
      represents the GRE ingress node and whose destination address
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