Support for Adjustable Maximum Router Lifetimes per Link
RFC 8319
| Document | Type |
RFC - Proposed Standard
(February 2018; No errata)
Updates RFC 4861
Was draft-ietf-6man-maxra (6man WG)
|
|
|---|---|---|---|
| Last updated | 2018-12-19 | ||
| Replaces | draft-krishnan-6man-maxra | ||
| Stream | IETF | ||
| Formats | plain text pdf htmlized bibtex | ||
| Reviews | |||
| Stream | WG state | Submitted to IESG for Publication | |
| Document shepherd | Bob Hinden | ||
| Shepherd write-up | Show (last changed 2017-07-24) | ||
| IESG | IESG state | RFC 8319 (Proposed Standard) | |
| Consensus Boilerplate | Yes | ||
| Telechat date | |||
| Responsible AD | Terry Manderson | ||
| Send notices to | bob.hinden@gmail.com, otroan@employees.org | ||
| IANA | IANA review state | IANA OK - No Actions Needed | |
| IANA action state | No IANA Actions | ||
Internet Engineering Task Force (IETF) S. Krishnan
Request for Comments: 8319 Kaloom
Updates: 4861 J. Korhonen
Category: Standards Track Nordic Semiconductor ASA
ISSN: 2070-1721 S. Chakrabarti
Verizon
E. Nordmark
Zededa
A. Yourtchenko
Cisco
February 2018
Support for Adjustable Maximum Router Lifetimes per Link
Abstract
The IPv6 Neighbor Discovery protocol specifies the maximum time
allowed between sending unsolicited multicast Router Advertisements
(RAs) from a router interface as well as the maximum router lifetime.
It also allows the limits to be overridden by documents that are
specific to the link layer. This document allows for overriding
these values on a per-link basis.
This document specifies updates to the IPv6 Neighbor Discovery
Protocol (RFC 4861) to increase the maximum time allowed between
sending unsolicited multicast RAs from a router interface as well as
to increase the maximum router lifetime.
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
https://www.rfc-editor.org/info/rfc8319.
Krishnan, et al. Standards Track [Page 1]
RFC 8319 Adjustable Router Lifetimes February 2018
Copyright Notice
Copyright (c) 2018 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 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
2. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 3
3. Relationship between AdvDefaultLifetime and MaxRtrAdvInterval 3
4. Updates to RFC 4861 . . . . . . . . . . . . . . . . . . . . . 4
5. Host Behavior . . . . . . . . . . . . . . . . . . . . . . . . 5
6. Security Considerations . . . . . . . . . . . . . . . . . . . 5
7. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 5
8. References . . . . . . . . . . . . . . . . . . . . . . . . . 5
8.1. Normative References . . . . . . . . . . . . . . . . . . 5
8.2. Informative References . . . . . . . . . . . . . . . . . 6
Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . . 6
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 7
Krishnan, et al. Standards Track [Page 2]
RFC 8319 Adjustable Router Lifetimes February 2018
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 data
link 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 clarifications specific to
the link technology about how to tune the Neighbor Discovery Protocol
(NDP) constants for certain systems in order to reduce excess NDP
traffic. For example, [RFC6459] and [RFC7066] contain such
clarifications for 3GPP cellular links.
This document specifies updates to the IPv6 Neighbor Discovery
Protocol [RFC4861] to increase the maximum time allowed between
sending unsolicited multicast RAs from a router interface as well as
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