LISP Delegated Database Tree
draft-ietf-lisp-ddt-07

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Document Type Active Internet-Draft (lisp WG)
Last updated 2016-08-01 (latest revision 2016-05-31)
Replaces draft-fuller-lisp-ddt
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Intended RFC status Experimental
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Network Working Group                                          V. Fuller
Internet-Draft
Intended status: Experimental                                   D. Lewis
Expires: December 2, 2016                                     V. Ermagan
                                                           Cisco Systems
                                                                 A. Jain
                                                        Juniper Networks
                                                              A. Smirnov
                                                           Cisco Systems
                                                            May 31, 2016

                      LISP Delegated Database Tree
                         draft-ietf-lisp-ddt-07

Abstract

   This document describes the LISP Delegated Database Tree (LISP-DDT),
   a hierarchical, distributed database which 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

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   This Internet-Draft will expire on December 2, 2016.

Copyright Notice

   Copyright (c) 2016 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

Fuller, et al.          Expires December 2, 2016                [Page 1]
Internet-Draft        LISP Delegated Database Tree              May 2016

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Requirements Language . . . . . . . . . . . . . . . . . . . .   4
   3.  Definition of Terms . . . . . . . . . . . . . . . . . . . . .   5
   4.  Database organization . . . . . . . . . . . . . . . . . . . .   7
     4.1.  EID-prefix tree structure and instance IDs  . . . . . . .   7
     4.2.  Configuring prefix delegation . . . . . . . . . . . . . .   7
       4.2.1.  The root DDT node . . . . . . . . . . . . . . . . . .   7
   5.  DDT Map-Request . . . . . . . . . . . . . . . . . . . . . . .   8
   6.  The Map-Referral message  . . . . . . . . . . . . . . . . . .   8
     6.1.  Action codes  . . . . . . . . . . . . . . . . . . . . . .   9
     6.2.  Referral set  . . . . . . . . . . . . . . . . . . . . . .   9
     6.3.  Incomplete flag . . . . . . . . . . . . . . . . . . . . .  10
     6.4.  Map-Referral Message Format . . . . . . . . . . . . . . .  10
       6.4.1.  SIG section . . . . . . . . . . . . . . . . . . . . .  12
   7.  DDT network elements and their operation  . . . . . . . . . .  13
     7.1.  DDT node  . . . . . . . . . . . . . . . . . . . . . . . .  14
       7.1.1.  Match of a delegated prefix (or sub-prefix) . . . . .  14
       7.1.2.  Missing delegation from an authoritative prefix . . .  14
     7.2.  DDT Map Server  . . . . . . . . . . . . . . . . . . . . .  14
     7.3.  DDT Map Resolver  . . . . . . . . . . . . . . . . . . . .  15
       7.3.1.  Queuing and sending DDT Map-Requests  . . . . . . . .  15
       7.3.2.  Receiving and following referrals . . . . . . . . . .  16
       7.3.3.  Handling referral errors  . . . . . . . . . . . . . .  17
       7.3.4.  Referral loop detection . . . . . . . . . . . . . . .  18
   8.  Pseudo Code and Decision Tree diagrams  . . . . . . . . . . .  18
     8.1.  Map Resolver processing of ITR Map-Request  . . . . . . .  19
       8.1.1.  Pseudo-code summary . . . . . . . . . . . . . . . . .  19
       8.1.2.  Decision tree diagram . . . . . . . . . . . . . . . .  19
     8.2.  Map Resolver processing of Map-Referral message . . . . .  20
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