Route Information Options in IPv6 Neighbor Discovery
draft-templin-6man-rio-redirect-03

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Last updated 2017-05-12
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Network Working Group                                    F. Templin, Ed.
Internet-Draft                              Boeing Research & Technology
Updates: rfc4191, rfc4861 (if approved)                      J. Woodyatt
Intended status: Standards Track                                  Google
Expires: November 13, 2017                                  May 12, 2017

          Route Information Options in IPv6 Neighbor Discovery
                 draft-templin-6man-rio-redirect-03.txt

Abstract

   The IPv6 Neighbor Discovery (ND) protocol provides a Router
   Solicitation (RS) function allowing nodes to solicit a Router
   Advertisement (RA) response from an on-link router, a Neighbor
   Solicitation (NS) function allowing nodes to solicit a Neighbor
   Advertisement (NA) response from an on-link neighbor, and a Redirect
   function allowing routers to inform nodes of a better next hop
   neighbor on the link toward the destination.  This document specifies
   backward-compatible extensions to IPv6 ND messages to support the
   discovery of more-specific routes.

Status of This Memo

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

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   This Internet-Draft will expire on November 13, 2017.

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   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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   (http://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents

Templin & Woodyatt      Expires November 13, 2017               [Page 1]
Internet-Draft              RIOs in Redirects                   May 2017

   carefully, as they describe your rights and restrictions with respect
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   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   3
   3.  Motivation  . . . . . . . . . . . . . . . . . . . . . . . . .   3
   4.  Route Information Options in IPv6 Neighbor Discovery Messages   4
     4.1.  Classical Redirection Scenario  . . . . . . . . . . . . .   4
     4.2.  RIO Redirection Scenario  . . . . . . . . . . . . . . . .   6
       4.2.1.  Router Specification  . . . . . . . . . . . . . . . .   6
       4.2.2.  Source Specification  . . . . . . . . . . . . . . . .   6
       4.2.3.  Target Specification  . . . . . . . . . . . . . . . .   7
       4.2.4.  Operation Without Redirects . . . . . . . . . . . . .   8
       4.2.5.  Multiple RIOs . . . . . . . . . . . . . . . . . . . .   8
       4.2.6.  Why NS/NA?  . . . . . . . . . . . . . . . . . . . . .   8
       4.2.7.  RIOs in RS Messages . . . . . . . . . . . . . . . . .   9
   5.  Implementation Status . . . . . . . . . . . . . . . . . . . .   9
   6.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   9
   7.  Security Considerations . . . . . . . . . . . . . . . . . . .   9
   8.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .  10
   9.  References  . . . . . . . . . . . . . . . . . . . . . . . . .  11
     9.1.  Normative References  . . . . . . . . . . . . . . . . . .  11
     9.2.  Informative References  . . . . . . . . . . . . . . . . .  11
   Appendix A.  Link-layer Address Changes . . . . . . . . . . . . .  12
   Appendix B.  Interfaces with Multiple Link-Layer Addresses  . . .  12
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  12

1.  Introduction

   "Neighbor Discovery for IP version 6 (IPv6)" [RFC4861] (IPv6 ND)
   provides a Router Solicitation (RS) function allowing nodes to
   solicit a Router Advertisement (RA) response from an on-link router,
   a Neighbor Solicitation (NS) function allowing nodes to solicit a
   Neighbor Advertisement (NA) response from an on-link neighbor, and a
   Redirect function allowing routers to inform nodes of a better next
   hop neighbor on the link toward the destination.  Further guidance
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