Locator/ID Separation Protocol (LISP) Map-Server Interface
RFC 6833

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Internet Engineering Task Force (IETF)                         V. Fuller
Request for Comments: 6833
Category: Experimental                                      D. Farinacci
ISSN: 2070-1721                                            Cisco Systems
                                                            January 2013

       Locator/ID Separation Protocol (LISP) Map-Server Interface

Abstract

   This document describes the Mapping Service for the Locator/ID
   Separation Protocol (LISP), implemented by two new types of LISP-
   speaking devices -- the LISP Map-Resolver and LISP Map-Server -- that
   provides a simplified "front end" for one or more Endpoint ID to
   Routing Locator mapping databases.

   By using this service interface and communicating with Map-Resolvers
   and Map-Servers, LISP Ingress Tunnel Routers and Egress Tunnel
   Routers are not dependent on the details of mapping database systems,
   which facilitates experimentation with different database designs.
   Since these devices implement the "edge" of the LISP infrastructure,
   connect directly to LISP-capable Internet end sites, and comprise the
   bulk of LISP-speaking devices, reducing their implementation and
   operational complexity should also reduce the overall cost and effort
   of deploying LISP.

Status of This Memo

   This document is not an Internet Standards Track specification; it is
   published for examination, experimental implementation, and
   evaluation.

   This document defines an Experimental Protocol for the Internet
   community.  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 5741.

   Information about the current status of this document, any errata,
   and how to provide feedback on it may be obtained at
   http://www.rfc-editor.org/info/rfc6833.

Fuller & Farinacci            Experimental                      [Page 1]
RFC 6833                LISP Map-Server Interface           January 2013

Copyright Notice

   Copyright (c) 2013 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
   2. Definition of Terms .............................................3
   3. Basic Overview ..................................................4
   4. Interactions with Other LISP Components .........................5
      4.1. ITR EID-to-RLOC Mapping Resolution .........................5
      4.2. EID-Prefix Configuration and ETR Registration ..............6
      4.3. Map-Server Processing ......................................8
      4.4. Map-Resolver Processing ....................................9
           4.4.1. Anycast Map-Resolver Operation .....................10
   5. Open Issues and Considerations .................................10
   6. Security Considerations ........................................11
   7. References .....................................................12
      7.1. Normative References ......................................12
      7.2. Informative References ....................................12
   Appendix A. Acknowledgments .......................................13

1.  Introduction

   The Locator/ID Separation Protocol [RFC6830] specifies an
   architecture and mechanism for replacing the addresses currently used
   by IP with two separate name spaces: Endpoint IDs (EIDs), used within
   sites; and Routing Locators (RLOCs), used on the transit networks
   that make up the Internet infrastructure.  To achieve this
   separation, LISP defines protocol mechanisms for mapping from EIDs to
   RLOCs.  In addition, LISP assumes the existence of a database to
   store and propagate those mappings globally.  Several such databases
   have been proposed; among them are the Content distribution Overlay
   Network Service for LISP (LISP-CONS) [LISP-CONS], LISP-NERD
   (a Not-so-novel EID-to-RLOC Database) [RFC6837], and LISP Alternative
   Logical Topology (LISP+ALT) [RFC6836].

Fuller & Farinacci            Experimental                      [Page 2]
RFC 6833                LISP Map-Server Interface           January 2013