LISP Shared Extension Message & IANA Registry for LISP Packet Type Allocations
draft-ietf-lisp-type-iana-05

Abstract

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

This document updates RFC6830.

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 RFC 2119 [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 working documents as Internet-Drafts. The list of current Internet-Drafts is at http://datatracker.ietf.org/drafts/current/.

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This Internet-Draft will expire on August 5, 2017.

Copyright Notice

Copyright (c) 2017 IETF Trust and the persons identified as the document authors. All rights reserved.

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Table of Contents

• 1. Introduction
• 2. LISP Shared Extension Message Type
• 3. Security Considerations
• 4. IANA Considerations
• 4.1. LISP Packet Types
• 4.2. Sub-Types
• 5. Acknowledgments
• 6. References
• 6.1. Normative references
• 6.2. Informative References
• Authors' Addresses

1. Introduction

The Locator/ID Separation Protocol (LISP, [RFC6830]) base specification defines a set of primitives that are identified with a packet type code. Several extensions have been proposed to add more LISP functionalities. For example, new message types are proposed in [I-D.ietf-lisp-ddt], [I-D.zhao-lisp-mn-extension], [I-D.boucadair-lisp-bulk], [I-D.ermagan-lisp-nat-traversal], or [I-D.boucadair-lisp-subscribe]. It is expected that additional LISP extensions will be proposed in the future.

In order to ease the tracking of LISP message types, this document proposes to create a "LISP Packet Types" IANA registry (see Section 4).

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 proposes a procedure for registering LISP shared extension sub-types (see Section 2). 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. 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 4).

        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                       //
       //                                                             //
       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

Message                           Code    Reference
================================= ==== ===============
Reserved                           0      [RFC6830]
LISP Map-Request                   1      [RFC6830]
LISP Map-Reply                     2      [RFC6830]
LISP Map-Register                  3      [RFC6830]
LISP Map-Notify                    4      [RFC6830]
LISP Encapsulated Control Message  8      [RFC6830]
LISP Shared Extension Message     15   [This document]