IPv6 Router Advertisement Options for DNS Configuration
RFC 8106

Document Type RFC - Proposed Standard (March 2017; No errata)
Obsoletes RFC 6106
Last updated 2017-03-17
Replaces draft-jeong-6man-rdnss-rfc6106-bis
Stream IETF
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Reviews
Stream WG state Submitted to IESG for Publication
Document shepherd Fernando Gont
Shepherd write-up Show (last changed 2016-09-21)
IESG IESG state RFC 8106 (Proposed Standard)
Consensus Boilerplate Yes
Telechat date
Responsible AD Suresh Krishnan
Send notices to "Fernando Gont" <fgont@si6networks.com>, bob.hinden@gmail.com, otroan@employees.org
IANA IANA review state Version Changed - Review Needed
IANA action state RFC-Ed-Ack
Internet Engineering Task Force (IETF)                          J. Jeong
Request for Comments: 8106                       Sungkyunkwan University
Obsoletes: 6106                                                  S. Park
Category: Standards Track                            Samsung Electronics
ISSN: 2070-1721                                               L. Beloeil
                                                                  Orange
                                                          S. Madanapalli
                                                                NTT Data
                                                              March 2017

        IPv6 Router Advertisement Options for DNS Configuration

Abstract

   This document specifies IPv6 Router Advertisement (RA) options
   (called "DNS RA options") to allow IPv6 routers to advertise a list
   of DNS Recursive Server Addresses and a DNS Search List to IPv6
   hosts.

   This document, which obsoletes RFC 6106, defines a higher default
   value of the lifetime of the DNS RA options to reduce the likelihood
   of expiry of the options on links with a relatively high rate of
   packet loss.

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/rfc8106.

Jeong, et al.                Standards Track                    [Page 1]
RFC 8106                   IPv6 DNS RA Options                March 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. Applicability Statements ...................................3
      1.2. Coexistence of RA Options and DHCP Options for DNS
           Configuration ..............................................4
   2. Requirements Language ...........................................4
   3. Terminology .....................................................4
   4. Overview ........................................................5
   5. Neighbor Discovery Extension ....................................5
      5.1. Recursive DNS Server Option ................................6
      5.2. DNS Search List Option .....................................7
      5.3. DNS Configuration Procedure ................................8
           5.3.1. Procedure in IPv6 Hosts .............................9
           5.3.2. Warnings for DNS Options Configuration ..............9
   6. Implementation Considerations ..................................10
      6.1. DNS Repository Management .................................10
      6.2. Synchronization between DNS Server List and
           Resolver Repository .......................................11
      6.3. Synchronization between DNS Search List and
           Resolver Repository .......................................12
   7. Security Considerations ........................................12
      7.1. Security Threats ..........................................12
      7.2. Recommendations ...........................................13
   8. IANA Considerations ............................................13
   9. References .....................................................14
      9.1. Normative References ......................................14
      9.2. Informative References ....................................14
   Appendix A. Changes from RFC 6106 .................................17
   Acknowledgements ..................................................18
   Authors' Addresses ................................................19

Jeong, et al.                Standards Track                    [Page 2]
RFC 8106                   IPv6 DNS RA Options                March 2017
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