Locator/ID Separation Protocol Delegated Database Tree (LISP-DDT)
RFC 8111

Document Type RFC - Experimental (May 2017; No errata)
Last updated 2017-05-26
Replaces draft-fuller-lisp-ddt
Stream IETF
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Stream WG state Submitted to IESG for Publication
Document shepherd Luigi Iannone
Shepherd write-up Show (last changed 2016-06-13)
IESG IESG state RFC 8111 (Experimental)
Consensus Boilerplate Yes
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Responsible AD Deborah Brungard
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IANA IANA review state Version Changed - Review Needed
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Internet Engineering Task Force (IETF)                         V. Fuller
Request for Comments: 8111                   VAF.NET Internet Consulting
Category: Experimental                                          D. Lewis
ISSN: 2070-1721                                               V. Ermagan
                                                           Cisco Systems
                                                                 A. Jain
                                                        Juniper Networks
                                                              A. Smirnov
                                                           Cisco Systems
                                                                May 2017

   Locator/ID Separation Protocol Delegated Database Tree (LISP-DDT)

Abstract

   This document describes the Locator/ID Separation Protocol Delegated
   Database Tree (LISP-DDT), a hierarchical distributed database that
   embodies the delegation of authority to provide mappings from LISP
   Endpoint Identifiers (EIDs) to Routing Locators (RLOCs).  It is a
   statically defined distribution of the EID namespace among a set of
   LISP-speaking servers called "DDT nodes".  Each DDT node is
   configured as "authoritative" for one or more EID-prefixes, along
   with the set of RLOCs for Map-Servers or "child" DDT nodes to which
   more-specific EID-prefixes are delegated.

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 7841.

   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/rfc8111.

Fuller, et al.                Experimental                      [Page 1]
RFC 8111                        LISP-DDT                        May 2017

Copyright Notice

   Copyright (c) 2017 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
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   described in the Simplified BSD License.

Table of Contents

   1. Introduction ....................................................4
   2. Requirements Language ...........................................5
   3. Definitions of Terms ............................................6
   4. Database Organization ...........................................8
      4.1. XEID-Prefixes ..............................................8
      4.2. Structure of the DDT Database ..............................8
      4.3. Configuring Prefix Delegation ..............................9
           4.3.1. The Root DDT Node ..................................10
   5. DDT Map-Request ................................................10
   6. The Map-Referral Message .......................................11
      6.1. Action Codes ..............................................11
      6.2. Referral Set ..............................................12
      6.3. "Incomplete" Flag .........................................12
      6.4. Map-Referral Message Format ...............................13
           6.4.1. Signature Section ..................................15
   7. DDT Network Elements and Their Operation .......................17
      7.1. DDT Node ..................................................17
           7.1.1. Matching of a Delegated Prefix (or Sub-prefix) .....17
           7.1.2. Missing Delegation from an Authoritative Prefix ....18
      7.2. DDT Map-Server ............................................18
      7.3. DDT Client ................................................18
           7.3.1. Queuing and Sending DDT Map-Requests ...............19
           7.3.2. Receiving and Following Referrals ..................20
           7.3.3. Handling Referral Errors ...........................22
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