The Locator/ID Separation Protocol (LISP)
draft-ietf-lisp-rfc6830bis-07

Document Type Active Internet-Draft (lisp WG)
Last updated 2017-11-11
Replaces draft-farinacci-lisp-rfc6830bis
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Network Working Group                                       D. Farinacci
Internet-Draft                                                 V. Fuller
Intended status: Standards Track                                D. Meyer
Expires: May 15, 2018                                           D. Lewis
                                                           Cisco Systems
                                                       A. Cabellos (Ed.)
                                                       UPC/BarcelonaTech
                                                       November 11, 2017

               The Locator/ID Separation Protocol (LISP)
                     draft-ietf-lisp-rfc6830bis-07

Abstract

   This document describes the data-plane protocol for the Locator/ID
   Separation Protocol (LISP).  LISP defines two namespaces, End-point
   Identifiers (EIDs) that identify end-hosts and Routing Locators
   (RLOCs) that identify network attachment points.  With this, LISP
   effectively separates control from data, and allows routers to create
   overlay networks.  LISP-capable routers exchange encapsulated packets
   according to EID-to-RLOC mappings stored in a local map-cache.  The
   map-cache is populated by the LISP Control-Plane protocol
   [I-D.ietf-lisp-rfc6833bis].

   LISP requires no change to either host protocol stacks or to underlay
   routers and offers Traffic Engineering, multihoming and mobility,
   among other features.

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

   Internet-Drafts are working documents of the Internet Engineering
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   This Internet-Draft will expire on May 15, 2018.

Farinacci, et al.         Expires May 15, 2018                  [Page 1]
Internet-Draft                    LISP                     November 2017

Copyright Notice

   Copyright (c) 2017 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Requirements Notation . . . . . . . . . . . . . . . . . . . .   4
   3.  Definition of Terms . . . . . . . . . . . . . . . . . . . . .   4
   4.  Basic Overview  . . . . . . . . . . . . . . . . . . . . . . .   9
     4.1.  Packet Flow Sequence  . . . . . . . . . . . . . . . . . .  11
   5.  LISP Encapsulation Details  . . . . . . . . . . . . . . . . .  13
     5.1.  LISP IPv4-in-IPv4 Header Format . . . . . . . . . . . . .  14
     5.2.  LISP IPv6-in-IPv6 Header Format . . . . . . . . . . . . .  15
     5.3.  Tunnel Header Field Descriptions  . . . . . . . . . . . .  16
   6.  LISP EID-to-RLOC Map-Cache  . . . . . . . . . . . . . . . . .  20
   7.  Dealing with Large Encapsulated Packets . . . . . . . . . . .  20
     7.1.  A Stateless Solution to MTU Handling  . . . . . . . . . .  21
     7.2.  A Stateful Solution to MTU Handling . . . . . . . . . . .  22
   8.  Using Virtualization and Segmentation with LISP . . . . . . .  22
   9.  Routing Locator Selection . . . . . . . . . . . . . . . . . .  23
   10. Routing Locator Reachability  . . . . . . . . . . . . . . . .  24
     10.1.  Echo Nonce Algorithm . . . . . . . . . . . . . . . . . .  27
     10.2.  RLOC-Probing Algorithm . . . . . . . . . . . . . . . . .  28
   11. EID Reachability within a LISP Site . . . . . . . . . . . . .  29
   12. Routing Locator Hashing . . . . . . . . . . . . . . . . . . .  30
   13. Changing the Contents of EID-to-RLOC Mappings . . . . . . . .  31
     13.1.  Clock Sweep  . . . . . . . . . . . . . . . . . . . . . .  32
     13.2.  Solicit-Map-Request (SMR)  . . . . . . . . . . . . . . .  32
     13.3.  Database Map-Versioning  . . . . . . . . . . . . . . . .  34
   14. Multicast Considerations  . . . . . . . . . . . . . . . . . .  35
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