Home Network Prefix Renumbering in Proxy Mobile IPv6 (PMIPv6)
RFC 8191

Document Type RFC - Proposed Standard (August 2017; No errata)
Last updated 2017-08-03
Replaces draft-yan-dmm-hnprenum
Stream IETF
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Reviews
Stream WG state Submitted to IESG for Publication
Document shepherd Dapeng Liu
Shepherd write-up Show (last changed 2016-11-01)
IESG IESG state RFC 8191 (Proposed Standard)
Consensus Boilerplate Yes
Telechat date
Responsible AD Suresh Krishnan
Send notices to "Dapeng Liu" <max.ldp@alibaba-inc.com>
IANA IANA review state Version Changed - Review Needed
IANA action state No IC
Internet Engineering Task Force (IETF)                            Z. Yan
Request for Comments: 8191                                         CNNIC
Category: Standards Track                                         J. Lee
ISSN: 2070-1721                                     Sangmyung University
                                                                  X. Lee
                                                                   CNNIC
                                                             August 2017

     Home Network Prefix Renumbering in Proxy Mobile IPv6 (PMIPv6)

Abstract

   In the basic Proxy Mobile IPv6 (PMIPv6) specification, a Mobile Node
   (MN) is assigned with a Home Network Prefix (HNP) during its initial
   attachment, and the MN configures its Home Address (HoA) with the
   HNP.  During the movement of the MN, the HNP remains unchanged to
   keep ongoing communications associated with the HoA.  However, the
   current PMIPv6 specification does not specify related operations when
   HNP renumbering has occurred (e.g., due to change of service provider
   or site topology, etc.).  In this document, a solution to support HNP
   renumbering is proposed, as an optional extension of the PMIPv6
   specification.

Status of This Memo

   This is an Internet Standards Track document.

   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).  Further information on
   Internet Standards is available in 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/rfc8191.

Yan, et al.                  Standards Track                    [Page 1]
RFC 8191                 PMIPv6 HNP Renumbering              August 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
   Provisions Relating to IETF Documents
   (http://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents
   carefully, as they describe your rights and restrictions with respect
   to this document.  Code Components extracted from this document must
   include Simplified BSD License text as described in Section 4.e of
   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
     1.1.  Requirements Language . . . . . . . . . . . . . . . . . .   3
   2.  Usage Scenarios . . . . . . . . . . . . . . . . . . . . . . .   3
   3.  HNP Renumbering Procedure . . . . . . . . . . . . . . . . . .   4
   4.  Session Connectivity  . . . . . . . . . . . . . . . . . . . .   6
   5.  Message Format  . . . . . . . . . . . . . . . . . . . . . . .   6
   6.  Other Issues  . . . . . . . . . . . . . . . . . . . . . . . .   7
   7.  Security Considerations . . . . . . . . . . . . . . . . . . .   7
   8.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   7
   9.  References  . . . . . . . . . . . . . . . . . . . . . . . . .   8
     9.1.  Normative References  . . . . . . . . . . . . . . . . . .   8
     9.2.  Informative References  . . . . . . . . . . . . . . . . .   9
   Acknowledgements  . . . . . . . . . . . . . . . . . . . . . . . .  10
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  10

Yan, et al.                  Standards Track                    [Page 2]
RFC 8191                 PMIPv6 HNP Renumbering              August 2017

1.  Introduction

   At the time of writing, network managers prefer Provider-Independent
   (PI) addressing for IPv6 to attempt to minimize the need for future
   possible renumbering.  However, a widespread use of PI addresses will
   cause Border Gateway Protocol (BGP) scaling problems [RFC7010].  It
   is thus desirable to develop tools and practices that make IPv6
   renumbering a simpler process to reduce demand for IPv6 PI space
   [RFC6879].  In this document, we aim to support HNP renumbering when
   the HNP in PMIPv6 [RFC5213] is not a PI prefix.

1.1.  Requirements Language

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and
   "OPTIONAL" in this document are to be interpreted as described in BCP
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