IPv6 Backbone Router
draft-ietf-6lo-backbone-router-20

Document Type Active Internet-Draft (6lo WG)
Last updated 2020-03-24 (latest revision 2020-03-23)
Replaces draft-thubert-6lo-backbone-router
Stream IETF
Intended RFC status Proposed Standard
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Send notices to "Samita Chakrabarti" <samitac.ietf@gmail.com>, Carles Gomez <carlesgo@entel.upc.edu>, Shwetha Bhandari <shwethab@cisco.com>
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RFC Editor RFC Editor state EDIT
6lo                                                      P. Thubert, Ed.
Internet-Draft                                             Cisco Systems
Updates: 6775, 8505 (if approved)                           C.E. Perkins
Intended status: Standards Track                  Blue Meadow Networking
Expires: 24 September 2020                              E. Levy-Abegnoli
                                                           Cisco Systems
                                                           23 March 2020

                          IPv6 Backbone Router
                   draft-ietf-6lo-backbone-router-20

Abstract

   This document updates RFC 6775 and RFC 8505 in order to enable proxy
   services for IPv6 Neighbor Discovery by Routing Registrars called
   Backbone Routers.  Backbone Routers are placed along the wireless
   edge of a Backbone, and federate multiple wireless links to form a
   single Multi-Link Subnet.

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
   Task Force (IETF).  Note that other groups may also distribute
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   Drafts is at https://datatracker.ietf.org/drafts/current/.

   Internet-Drafts are draft documents valid for a maximum of six months
   and may be updated, replaced, or obsoleted by other documents at any
   time.  It is inappropriate to use Internet-Drafts as reference
   material or to cite them other than as "work in progress."

   This Internet-Draft will expire on 24 September 2020.

Copyright Notice

   Copyright (c) 2020 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 (https://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

Thubert, et al.         Expires 24 September 2020               [Page 1]
Internet-Draft            IPv6 Backbone Router                March 2020

   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  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   5
     2.1.  BCP 14  . . . . . . . . . . . . . . . . . . . . . . . . .   5
     2.2.  New Terms . . . . . . . . . . . . . . . . . . . . . . . .   5
     2.3.  Abbreviations . . . . . . . . . . . . . . . . . . . . . .   6
     2.4.  References  . . . . . . . . . . . . . . . . . . . . . . .   7
   3.  Overview  . . . . . . . . . . . . . . . . . . . . . . . . . .   7
     3.1.  Updating RFC 6775 and RFC 8505  . . . . . . . . . . . . .  10
     3.2.  Access Link . . . . . . . . . . . . . . . . . . . . . . .  11
     3.3.  Route-Over Mesh . . . . . . . . . . . . . . . . . . . . .  13
     3.4.  The Binding Table . . . . . . . . . . . . . . . . . . . .  14
     3.5.  Primary and Secondary 6BBRs . . . . . . . . . . . . . . .  15
     3.6.  Using Optimistic DAD  . . . . . . . . . . . . . . . . . .  16
   4.  Multi-Link Subnet Considerations  . . . . . . . . . . . . . .  17
   5.  Optional 6LBR serving the Multi-Link Subnet . . . . . . . . .  17
   6.  Using IPv6 ND Over the Backbone Link  . . . . . . . . . . . .  18
   7.  Routing Proxy Operations  . . . . . . . . . . . . . . . . . .  20
   8.  Bridging Proxy Operations . . . . . . . . . . . . . . . . . .  21
   9.  Creating and Maintaining a Binding  . . . . . . . . . . . . .  22
     9.1.  Operations on a Binding in Tentative State  . . . . . . .  23
     9.2.  Operations on a Binding in Reachable State  . . . . . . .  24
     9.3.  Operations on a Binding in Stale State  . . . . . . . . .  25
   10. Registering Node Considerations . . . . . . . . . . . . . . .  26
   11. Security Considerations . . . . . . . . . . . . . . . . . . .  27
   12. Protocol Constants  . . . . . . . . . . . . . . . . . . . . .  30
   13. IANA Considerations . . . . . . . . . . . . . . . . . . . . .  30
   14. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . .  30
   15. Normative References  . . . . . . . . . . . . . . . . . . . .  30
   16. Informative References  . . . . . . . . . . . . . . . . . . .  32
   Appendix A.  Possible Future Extensions . . . . . . . . . . . . .  34
   Appendix B.  Applicability and Requirements Served  . . . . . . .  35
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  37

1.  Introduction

   IEEE STD. 802.1 [IEEEstd8021] Ethernet Bridging provides an efficient
   and reliable broadcast service for wired networks; applications and
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