Support for adjustable maximum router lifetimes per-link
draft-ietf-6man-maxra-04

Document Type Active Internet-Draft (6man WG)
Last updated 2017-12-05 (latest revision 2017-11-28)
Replaces draft-krishnan-6man-maxra
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IPv6 Maintenance                                             S. Krishnan
Internet-Draft                                                    Kaloom
Updates: 4861 (if approved)                                  J. Korhonen
Intended status: Standards Track                                Broadcom
Expires: June 1, 2018                                     S. Chakrabarti
                                                                Ericsson
                                                             E. Nordmark
                                                         Arista Networks
                                                          A. Yourtchenko
                                                                   cisco
                                                       November 28, 2017

        Support for adjustable maximum router lifetimes per-link
                        draft-ietf-6man-maxra-04

Abstract

   The IPv6 Neighbor Discovery protocol specifies the maximum time
   allowed between sending unsolicited multicast Router Advertisements
   from a router interface as well as the maximum router lifetime.  It
   also allows the limits to be overridden by link-layer specific
   documents.  This document allows for overriding these values on a
   per-link basis.

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 June 1, 2018.

Copyright Notice

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

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Internet-Draft         Adjustable Router Lifetimes         November 2017

   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 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 . . . . . . . . . . . . . . . . . . . . . . . . .   3
   3.  Relationship between AdvDefaultLifetime and MaxRtrAdvInterval   3
   4.  Updates to RFC4861  . . . . . . . . . . . . . . . . . . . . .   4
   5.  Host Behavior . . . . . . . . . . . . . . . . . . . . . . . .   4
   6.  Security Considerations . . . . . . . . . . . . . . . . . . .   4
   7.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   4
   8.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .   4
   9.  References  . . . . . . . . . . . . . . . . . . . . . . . . .   5
     9.1.  Normative References  . . . . . . . . . . . . . . . . . .   5
     9.2.  Informative References  . . . . . . . . . . . . . . . . .   5
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   5

1.  Introduction

   IPv6 Neighbor Discovery relies on IP multicast based on the
   expectation that multicast makes efficient use of available bandwidth
   and avoids generating interrupts in the network nodes.  On some
   datalink layers multicast may not be natively supported.  On such
   links, any possible reduction of multicast traffic will be highly
   beneficial.  Unfortunately, due to the fixed protocol constants
   specified in [RFC4861], it is difficult to relax the multicast timers
   for neighbor discovery.  There are already link technology specific
   clarifications describing how to tune the Neighbor Discovery Protocol
   (NDP) constants for certain systems with in order to reduce excess
   NDP traffic. e.g.  [RFC6459][RFC7066] contain such clarifications for
   3GPP cellular links.

   This document specifies updates to the IPv6 Neighbor Discovery
   Protocol [RFC4861] for increasing the the maximum time allowed
   between sending unsolicited multicast Router Advertisements (RA) from
   a router interface as well as for the maximum router lifetime.

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