Locator/ID Separation Protocol (LISP): Shared Extension Message & IANA Registry for Packet Type Allocations
draft-boucadair-lisp-rfc8113bis-00

LISP                                                        M. Boucadair
Internet-Draft                                              C. Jacquenet
Obsoletes: 8113 (if approved)                                     Orange
Intended status: Standards Track                      September 13, 2018
Expires: March 17, 2019

 Locator/ID Separation Protocol (LISP): Shared Extension Message & IANA
                  Registry for Packet Type Allocations
                   draft-boucadair-lisp-rfc8113bis-00

Abstract

   This document specifies a Locator/ID Separation Protocol (LISP)
   shared message type for defining future extensions and conducting
   experiments without consuming a LISP packet type codepoint for each
   extension.  It also defines a registry for LISP Packet Type
   allocations.

   This document obsoletes RFC 8113.

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
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   This Internet-Draft will expire on March 17, 2019.

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   to this document.  Code Components extracted from this document must
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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Requirements Language . . . . . . . . . . . . . . . . . . . .   2
   3.  LISP Shared Extension Message Type  . . . . . . . . . . . . .   3
   4.  Security Considerations . . . . . . . . . . . . . . . . . . .   3
   5.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   3
     5.1.  LISP Packet Types . . . . . . . . . . . . . . . . . . . .   3
     5.2.  Sub-Types . . . . . . . . . . . . . . . . . . . . . . . .   4
   6.  Acknowledgments . . . . . . . . . . . . . . . . . . . . . . .   4
   7.  Normative References  . . . . . . . . . . . . . . . . . . . .   4
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   5

1.  Introduction

   The Locator/ID Separation Protocol (LISP) base specification,
   [RFC6830], defines a set of primitives that are identified with a
   packet type code.  Several extensions have been proposed to add more
   LISP functionalities.  It is expected that additional LISP extensions
   will be proposed in the future.

   The "LISP Packet Types" IANA registry (see Section 5) is used to ease
   the tracking of LISP message types.

   Because of the limited type space [RFC6830] and the need to conduct
   experiments to assess new LISP extensions, this document specifies a
   shared LISP extension message type and describes a procedure for
   registering LISP shared extension sub-types (see Section 3).
   Concretely, one single LISP message type code is dedicated to future
   LISP extensions; sub-types are used to uniquely identify a given LISP
   extension making use of the shared LISP extension message type.
   These identifiers are selected by the author(s) of the corresponding
   LISP specification that introduces a new LISP extension message type.

2.  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].

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3.  LISP Shared Extension Message Type

   Figure 1 depicts the common format of the LISP shared extension
   message.  The type field MUST be set to 15 (see Section 5).

        0                   1                   2                   3
        0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
       |Type=15|        Sub-type       |   extension-specific          |
       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
       //                    extension-specific                       //
       //                                                             //
       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

               Figure 1: LISP Shared Extension Message Type

   The "Sub-type" field conveys a unique identifier that MUST be
   registered with IANA (see Section 5.2).

   The exact structure of the 'extension-specific' portion of the
   message is specified in the corresponding specification document.

4.  Security Considerations

   This document does not introduce any additional security issues other
   than those discussed in [RFC6830].

5.  IANA Considerations

5.1.  LISP Packet Types

   IANA has created a protocol registry for LISP Packet Types, numbered
   0-15.

   The values in the ranges 5-7 and 9-14 can be assigned via Standards
   Action [RFC8126].  Documents that request for a new LISP packet type
   may indicate a preferred value in the corresponding IANA sections.

   IANA is requested to replace the reference to RFC8113 with the RFC
   number to be assigned to this document.  Also, IANA is requested to
   update the table as follows:

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   OLD:

   Message                           Code    Reference
   ================================= ==== ===============
   LISP Shared Extension Message     15      [RFC8113]

   NEW:
   Message                           Code    Reference
   ================================= ==== ===============
   LISP Shared Extension Message     15      [ThisDocument]

5.2.  Sub-Types

   IANA has created the "LISP Shared Extension Message Type Sub-types"
   registry.  IANA is requested to update that registry by replacing the
   reference to RFC8113 with the RFC number to be assigned to this
   document.

   The values in the range 0-1023 are assigned via Standards Action.
   This range is provisioned to anticipate, in particular, the
   exhaustion of the LISP Packet types.

   The values in the range 1024-4095 are assigned on a First Come, First
   Served (FCFS) basis.  The registration procedure should provide IANA
   with the desired codepoint and a point of contact; providing a short
   description (together with an acronym, if relevant) of the foreseen
   usage of the extension message is also encouraged.

6.  Acknowledgments

   This work is partly funded by ANR LISP-Lab project #ANR-13-INFR-
   009-X.

   Many thanks to Luigi Iannone, Dino Farinacci, and Alvaro Retana for
   the review.

   Thanks to Geoff Huston for the RtgDir directorate review.

7.  Normative References

   [RFC2119]  Bradner, S., "Key words for use in RFCs to Indicate
              Requirement Levels", BCP 14, RFC 2119,
              DOI 10.17487/RFC2119, March 1997,
              <https://www.rfc-editor.org/info/rfc2119>.

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   [RFC6830]  Farinacci, D., Fuller, V., Meyer, D., and D. Lewis, "The
              Locator/ID Separation Protocol (LISP)", RFC 6830,
              DOI 10.17487/RFC6830, January 2013,
              <https://www.rfc-editor.org/info/rfc6830>.

   [RFC8126]  Cotton, M., Leiba, B., and T. Narten, "Guidelines for
              Writing an IANA Considerations Section in RFCs", BCP 26,
              RFC 8126, DOI 10.17487/RFC8126, June 2017,
              <https://www.rfc-editor.org/info/rfc8126>.

Authors' Addresses

   Mohamed Boucadair
   Orange
   Rennes  35000
   France

   EMail: mohamed.boucadair@orange.com

   Christian Jacquenet
   Orange
   Rennes  35000
   France

   EMail: christian.jacquenet@orange.com

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