IPv6 Prefix Delegation for Hosts
draft-templin-v6ops-pdhost-15

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Last updated 2017-10-16
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Network Working Group                                    F. Templin, Ed.
Internet-Draft                              Boeing Research & Technology
Intended status: Informational                          October 16, 2017
Expires: April 19, 2018

                    IPv6 Prefix Delegation for Hosts
                   draft-templin-v6ops-pdhost-15.txt

Abstract

   IPv6 prefixes are typically delegated to requesting routers which
   then use them to number their downstream-attached links and networks.
   This document considers the case when the requesting router is a node
   that acts as a host on behalf of its local applications and as a
   router on behalf of any downstream networks.

Status of This Memo

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   This Internet-Draft will expire on April 19, 2018.

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   5
   3.  Multi-Addressing Considerations . . . . . . . . . . . . . . .   6
   4.  Multi-Addressing Alternatives for Delegated Prefixes  . . . .   7
   5.  MLD/DAD Implications  . . . . . . . . . . . . . . . . . . . .   7
   6.  Dynamic Routing Protocol Implications . . . . . . . . . . . .   8
   7.  IPv6 Neighbor Discovery Implications  . . . . . . . . . . . .   8
   8.  ICMPv6 Implications . . . . . . . . . . . . . . . . . . . . .   9
   9.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   9
   10. Security Considerations . . . . . . . . . . . . . . . . . . .   9
   11. Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .  10
   12. References  . . . . . . . . . . . . . . . . . . . . . . . . .  10
     12.1.  Normative References . . . . . . . . . . . . . . . . . .  10
     12.2.  Informative References . . . . . . . . . . . . . . . . .  11
   Author's Address  . . . . . . . . . . . . . . . . . . . . . . . .  12

1.  Introduction

   IPv6 Prefix Delegation (PD) entails 1) the communication of a prefix
   from a delegating router to a requesting router, 2) a representation
   of the prefix in the delegating router's routing table, and 3) a
   control messaging service between the delegating and requesting
   routers to maintain prefix lifetimes.  Following delegation, the
   prefix is available for the requesting router's exclusive use and is
   not shared with any other nodes.  This document considers the case
   when the requesting router is a node that acts as a host on behalf of
   its local applications and as a router on behalf of any downstream
   networks.  The following paragraphs present possibilities for node
   behavior upon receipt of a delegated prefix.

   For nodes that connect downstream-attached networks (e.g., a
   cellphone that connects a "tethered" Internet of Things (IoT)
   network), a Delegating Router 'D' delegates a prefix 'P' to a
   Requesting node 'R' as shown in Figure 1:

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                        +---------------------+
                        |Delegating Router 'D'|
                        |   (Delegate 'P')    |
                        +----------+----------+
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