Internet Engineering Task Force (IETF)
Request for Comments: 7955
Category: Informational
ISSN: 2070-1721
L. Iannone
Telecom ParisTech
R. Jorgensen
Bredbandsfylket Troms
D. Conrad
Virtualized, LLC
G. Huston
September 2016

Management Guidelines for the Locator/ID Separation Protocol (LISP)

Endpoint Identifier (EID) Block


This document proposes a framework for the management of the Locator/ ID Separation Protocol (LISP) Endpoint Identifier (EID) address block. The framework described relies on hierarchical distribution of the address space, granting temporary usage of prefixes of such space to requesting organizations.

Status of This Memo

This document is not an Internet Standards Track specification; it is published for informational purposes.

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). Not all documents approved by the IESG are a candidate for any level of Internet Standard; see 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

Copyright Notice

Copyright © 2016 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 ( 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
   2.  Requirements Notation . . . . . . . . . . . . . . . . . . . .   3
   3.  Definition of Terms . . . . . . . . . . . . . . . . . . . . .   3
   4.  EID Prefix Registration Policy  . . . . . . . . . . . . . . .   3
   5.  EID Prefixes Registration Requirements  . . . . . . . . . . .   4
   6.  EID Prefix Request Template . . . . . . . . . . . . . . . . .   4
   7.  Policy Validity Period  . . . . . . . . . . . . . . . . . . .   6
   8.  Security Considerations . . . . . . . . . . . . . . . . . . .   6
   9.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   7
   10. Procedures to be Followed by RIPE NCC . . . . . . . . . . . .   7
   11. References  . . . . . . . . . . . . . . . . . . . . . . . . .   8
     11.1.  Normative References . . . . . . . . . . . . . . . . . .   8
     11.2.  Informative References . . . . . . . . . . . . . . . . .   8
   Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . . .  10
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  10

1. Introduction

   The Locator/ID Separation Protocol (LISP [RFC6830]) and related
   mechanisms ([RFC6831], [RFC6832], [RFC6833], [RFC6834], [RFC6835],
   [RFC6836], [RFC6837]) separate the IP addressing space into two
   logical spaces, the Endpoint Identifier (EID) space and the Routing
   Locator (RLOC) space.  The first space is used to identify
   communication endpoints, while the second is used to locate EIDs in
   the Internet routing infrastructure topology.

[RFC7954] requests an IPv6 address block reservation exclusively for use as EID prefixes in the LISP experiment. The rationale, intent, size, and usage of the EID address block are described in [RFC7954].

This document proposes a management framework for the registration of EID prefixes from that block, allowing the requesting organization exclusive use of those EID prefixes limited to the duration of the LISP experiment.

2. Requirements Notation

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].

3. Definition of Terms

   This document does not introduce any new terms related to the set of
   LISP Specifications ([RFC6830], [RFC6831], [RFC6832], [RFC6833],
   [RFC6834], [RFC6835], [RFC6836], [RFC6837]), but assumes that the
   reader is familiar with the LISP terminology.  [INTRO] provides an
   introduction to the LISP technology, including its terminology.

4. EID Prefix Registration Policy

The request for registration of EID prefixes MUST be done under the following policies:

  1. EID prefixes are made available in the reserved space on a temporary basis and for experimental uses. The requester of an experimental prefix MUST provide a short description of the intended use or experiment that will be carried out (see Section 6). If the prefix will be used for activities not documented in the original description, renewal of the registration may be denied.
  1. EID prefix registrations MUST be renewed on a regular basis to ensure their use by active participants in the experiment. The registration period is 12 months. A renewal SHOULD NOT cause a change in the EID prefix registered in the previous request. The conditions of registration renewal are to be the same as the conditions of the first EID prefix registration request.
  1. It is preferable that EID prefixes whose registrations have expired not be reused. When an EID prefix registration is removed from the registry, then the reuse of the EID prefix in a subsequent registration on behalf of a different end user should be avoided where possible. If the considerations of overall usage of the EID block prefix requires reuse of a previously registered EID prefix, then a minimum delay of at least one week between removal and subsequent registration SHOULD be applied by the registry operator.
  1. When the reserved experimental LISP EID block expires, all EID prefix registrations expire as well. The further disposition of these prefixes and the associated registry entries are to be specified in the announcement of the cessation of this experiment.

5. EID Prefixes Registration Requirements

All EID prefix registrations MUST satisfy the following requirements:

  1. All EID prefix registrations MUST use a globally unique EID prefix.
  1. The EID prefix registration information, as specified in Section 6, MUST be collected upon initial registration and renewal, and made publicly available through interfaces allowing both the retrieval of specific registration details (search) and the enumeration of the entire registry contents (e.g., RDAP ([RFC7481]), WHOIS, HTTP, or similar access methods).
  1. The registry operator MUST permit the delegation of EID prefixes in the reverse DNS space to holders of registered EID prefixes.
  1. Anyone can obtain an entry in the EID prefix registry, on the understanding that the prefix so registered is for the exclusive use in the LISP experimental network, and that their registration details (as specified in Section 6) are openly published in the EID prefix registry.

6. EID Prefix Request Template

The following is a basic request template for prefix registration to ensure a uniform process. This template is inspired by IANA's online "Private Enterprise Number (PEN) Request" form <>.

Note that all details in this registration become part of the registry and will be published in the LISP EID Prefix Registry managed by RIPE NCC.

The EID Prefix Request template MUST at a minimum contain:

  1. Organization (In the case of individuals requesting an EID prefix, this section can be left empty)

(a) Organization Name

(b) Organization Address

(c) Organization Phone

(d) Organization Website

  1. Contact Person (Mandatory)
       (a)  Name
       (b)  Address
       (c)  Phone

(d) Fax (optional)

       (e)  Email
   3.  EID Prefix Request (Mandatory)

(a) Prefix Size

  • Expressed as an address prefix length.

(b) Prefix Size Rationale

(c) Lease Period

  • Note well: All EID Prefix registrations will be valid until the earlier date of 12 months from the date of registration or August 2019.

+ All registrations may be renewed by the applicant for

further 12-month periods, ending on August 2019.

  • According to the 3+3 year experimentation plan, defined in [RFC7954], all registrations MUST end by August 2019, unless the IETF community decides to grant a permanent LISP EID address block. In the latter case, registrations following the present document policy MUST end by August 2022 and a new policy (to be decided -- see Section 7) will apply thereafter.
  1. Experiment Description

(a) Experiment and Deployment Description

(b) Interoperability with Existing LISP Deployments

(c) Interoperability with Legacy Internet

   5.  Reverse DNS Servers (Optional)

(a) Name Server Name

(b) Name Server Address

(c) Name Server Name

(d) Name Server Address

       (Repeat if necessary)

7. Policy Validity Period

The policy outlined in the present document is tied to the existence of the experimental LISP EID block requested in [RFC7954] and is valid until August 2019.

If the IETF decides to transform the block into a permanent allocation, the usage period reserved for the LISP EID block will be extended for three years (until August 2022) to allow time for the IETF to define, following the policies outlined in [RFC5226], the final size of the EID block and create a transition plan, while the policy in the present document will still apply.

Note that, as stated in [RFC7954], the transition of the EID block into a permanent allocation has the potential to pose policy issues (as recognized in [RFC2860], Section 4.3); hence, discussion with the IANA, the Regional Internet Registry (RIR) communities, and the IETF community will be necessary to determine the appropriate policy for permanent EID prefix management, which will be effective after August 2022.

8. Security Considerations

This document does not introduce new security threats in the LISP architecture nor in the Legacy Internet architecture.

For accountability reasons and in line with the security considerations in [RFC7020], each registration request MUST contain accurate information about the requesting entity (company, institution, individual, etc.) and valid and accurate contact information of a referral person (see Section 6).

9. IANA Considerations

IANA allocated the following IPv6 address block for experimental use as the LISP EID prefix [RFC7954]:

   o  Address Block: 2001:5::/32
  • Name: EID Space for LISP
   o  Further details are at:

To grant requesting organizations and individuals exclusive use of EID prefixes out of this reserved block (limited to the duration of the LISP experiment as outlined in Section 7), there is an operational requirement for an EID registration service.

Provided that the policies and requirements outlined in Sections 4, 5, and 6 are satisfied, EID prefix registration is accorded based on a "First Come First Served" basis.

There is no hard limit to the number of registrations an organization or individual can submit, as long as the information described in Section 6 is provided, in particular point 4: "Experiment Description".

For the duration defined in [RFC7954], RIPE NCC will manage the LISP EID prefix as described herein. Therefore, this document has no IANA actions.

10. Procedures to be Followed by RIPE NCC

RIPE NCC will provide the registration service following the EID Prefix Registration Policy (Section 4) and the EID Prefix Registration Requirements (Section 5) provided in this document. The request form provided by RIPE NCC will include at least the information from the template in Section 6. RIPE NCC will make all received requests publicly available. While this document does not suggest any minimum allocation size; RIPE NCC is allowed to introduce such a minimum size for management purposes.

11. References

11.1. 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,
   [RFC5226]  Narten, T. and H. Alvestrand, "Guidelines for Writing an
              IANA Considerations Section in RFCs", BCP 26, RFC 5226,
              DOI 10.17487/RFC5226, May 2008,
   [RFC7954]  Iannone, L., Lewis, D., Meyer, D., and V. Fuller,
              "Locator/ID Separation Protocol (LISP) Endpoint Identifier
              (EID) Block", RFC 7954, DOI 10.17487/RFC7954, September
              2016, <>.

11.2. Informative References

   [INTRO]    Cabellos-Aparicio, A. and D. Saucez, "An Architectural
              Introduction to the Locator/ID Separation Protocol
              (LISP)", Work in Progress, draft-ietf-lisp-introduction-
              13, April 2015.
   [RFC2860]  Carpenter, B., Baker, F., and M. Roberts, "Memorandum of
              Understanding Concerning the Technical Work of the
              Internet Assigned Numbers Authority", RFC 2860,
              DOI 10.17487/RFC2860, June 2000,
   [RFC6830]  Farinacci, D., Fuller, V., Meyer, D., and D. Lewis, "The
              Locator/ID Separation Protocol (LISP)", RFC 6830,
              DOI 10.17487/RFC6830, January 2013,
   [RFC6831]  Farinacci, D., Meyer, D., Zwiebel, J., and S. Venaas, "The
              Locator/ID Separation Protocol (LISP) for Multicast
              Environments", RFC 6831, DOI 10.17487/RFC6831, January
              2013, <>.
   [RFC6832]  Lewis, D., Meyer, D., Farinacci, D., and V. Fuller,
              "Interworking between Locator/ID Separation Protocol
              (LISP) and Non-LISP Sites", RFC 6832,
              DOI 10.17487/RFC6832, January 2013,
   [RFC6833]  Fuller, V. and D. Farinacci, "Locator/ID Separation
              Protocol (LISP) Map-Server Interface", RFC 6833,
              DOI 10.17487/RFC6833, January 2013,
   [RFC6834]  Iannone, L., Saucez, D., and O. Bonaventure, "Locator/ID
              Separation Protocol (LISP) Map-Versioning", RFC 6834,
              DOI 10.17487/RFC6834, January 2013,
   [RFC6835]  Farinacci, D. and D. Meyer, "The Locator/ID Separation
              Protocol Internet Groper (LIG)", RFC 6835,
              DOI 10.17487/RFC6835, January 2013,
   [RFC6836]  Fuller, V., Farinacci, D., Meyer, D., and D. Lewis,
              "Locator/ID Separation Protocol Alternative Logical
              Topology (LISP+ALT)", RFC 6836, DOI 10.17487/RFC6836,
              January 2013, <>.
   [RFC6837]  Lear, E., "NERD: A Not-so-novel Endpoint ID (EID) to
              Routing Locator (RLOC) Database", RFC 6837,
              DOI 10.17487/RFC6837, January 2013,
   [RFC7020]  Housley, R., Curran, J., Huston, G., and D. Conrad, "The
              Internet Numbers Registry System", RFC 7020,
              DOI 10.17487/RFC7020, August 2013,
   [RFC7481]  Hollenbeck, S. and N. Kong, "Security Services for the
              Registration Data Access Protocol (RDAP)", RFC 7481,
              DOI 10.17487/RFC7481, March 2015,


   Thanks to A. Retana, J. Arkko, P. Yee, A. de la Haye, A. Cima,
   A. Pawlik, J. Curran, A. Severin, B. Haberman, T. Manderson,
   D. Lewis, D. Farinacci, M. Binderberger, D. Saucez, E. Lear, for
   their helpful comments.

The work of Luigi Iannone has been partially supported by the ANR-13-INFR-0009 LISP-Lab Project <> and the EIT KIC ICT-Labs SOFNETS Project.

Authors' Addresses

Luigi Iannone
Telecom ParisTech


Roger Jorgensen
Bredbandsfylket Troms


David Conrad
Virtualized, LLC
United States


Geoff Huston
Asia Pacific Network Information Centre (APNIC)