Locator/ID Separation Protocol (LISP): Shared Extension Message and IANA Registry for Packet Type AllocationsOrangeRennes35000Francemohamed.boucadair@orange.comOrangeRennes35000Francechristian.jacquenet@orange.com
RTG
LISPShared Experiment CodeLISP codepointsExperiment IdentifierExperiment IDLISP Experimental RegistryLISP ExtensionExtending LISPExhausted LISP typesLISP IANAIANAThis 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.This document obsoletes RFC 8113.Status of This Memo
This is an Internet Standards Track document.
This document is a product of the Internet Engineering Task Force
(IETF). It represents the consensus of the IETF community. It has
received public review and has been approved for publication by
the Internet Engineering Steering Group (IESG). Further
information on Internet Standards is available in Section 2 of
RFC 7841.
Information about the current status of this document, any
errata, and how to provide feedback on it may be obtained at
.
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Table of Contents
. Introduction
. Requirements Language
. LISP Shared Extension Message Type
. Security Considerations
. IANA Considerations
. LISP Packet Types
. Sub-Types
. Changes from RFC 8113
. Normative References
Acknowledgments
Authors' Addresses
IntroductionThe Locator/ID Separation Protocol (LISP) 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. It is expected that
additional LISP extensions will be proposed in the future.The "LISP Packet Types" IANA registry (see ) is used to ease the tracking of LISP message
types.Because of the limited type space 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 ). 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.Requirements Language
The key words "MUST", "MUST NOT",
"REQUIRED", "SHALL", "SHALL NOT",
"SHOULD", "SHOULD NOT",
"RECOMMENDED", "NOT RECOMMENDED",
"MAY", and "OPTIONAL" in this document are to be
interpreted as described in BCP 14 when, and only when, they appear in all capitals, as
shown here.
LISP Shared Extension Message Type depicts the common format of the LISP
shared extension message. The type field MUST be set to 15 (see ).The 'Sub-type' field conveys a unique identifier that MUST be
registered with IANA (see ).The exact structure of the 'extension-specific' portion of the
message is specified in the corresponding specification document.Security ConsiderationsThis document does not introduce any additional security issues other
than those discussed in .IANA ConsiderationsLISP Packet TypesIANA has created a registry titled "LISP Packet Types",
numbered 0-15.Values can be assigned via Standards Action . Documents that request for a new LISP Packet
Type may indicate a preferred value in the corresponding IANA
sections.IANA has replaced the reference to RFC 8113 with the RFC
number of this document.Also, IANA has updated the table as follows:OLD:
Message
Code
Reference
LISP Shared Extension Message
15
[RFC8113]
NEW:
Message
Code
Reference
LISP Shared Extension Message
15
RFC 9304
Sub-TypesIANA has created the "LISP Shared Extension Message Type Sub-types"
registry. IANA has updated that registry by replacing the
reference to RFC 8113 with the RFC number of 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 is to 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.Changes from RFC 8113The following changes were made from RFC 8113:
Changed the status from Experimental to Standards Track.
Indicated explicitly that the shared extension is used for two
purposes: extend the type space and conduct experiments to assess
new LISP extensions.
Deleted pointers to some examples illustrating how the shared
extension message is used to extend the LISP protocol.
IANA has updated the "IANA LISP Packet Types" and "LISP
Shared Extension Message Type Sub-types" registries to point to this
document instead of RFC 8113.
Normative ReferencesKey words for use in RFCs to Indicate Requirement LevelsIn many standards track documents several words are used to signify the requirements in the specification. These words are often capitalized. This document defines these words as they should be interpreted in IETF documents. This document specifies an Internet Best Current Practices for the Internet Community, and requests discussion and suggestions for improvements.Guidelines for Writing an IANA Considerations Section in RFCsMany protocols make use of points of extensibility that use constants to identify various protocol parameters. To ensure that the values in these fields do not have conflicting uses and to promote interoperability, their allocations are often coordinated by a central record keeper. For IETF protocols, that role is filled by the Internet Assigned Numbers Authority (IANA).To make assignments in a given registry prudently, guidance describing the conditions under which new values should be assigned, as well as when and how modifications to existing values can be made, is needed. This document defines a framework for the documentation of these guidelines by specification authors, in order to assure that the provided guidance for the IANA Considerations is clear and addresses the various issues that are likely in the operation of a registry.This is the third edition of this document; it obsoletes RFC 5226.Ambiguity of Uppercase vs Lowercase in RFC 2119 Key WordsRFC 2119 specifies common key words that may be used in protocol specifications. This document aims to reduce the ambiguity by clarifying that only UPPERCASE usage of the key words have the defined special meanings.Locator/ID Separation Protocol (LISP) Control PlaneAcknowledgmentsThis work is partly funded by ANR LISP-Lab project
#ANR-13-INFR-009-X.Many thanks to , , and for
the review.Thanks to , , , and for the review.Authors' AddressesOrangeRennes35000Francemohamed.boucadair@orange.comOrangeRennes35000Francechristian.jacquenet@orange.com