IPv6 Router Advertisement Options for DNS Configuration
draft-ietf-6man-rdnss-rfc6106bis-00

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Last updated 2015-07-21
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Network Working Group                                           J. Jeong
Internet-Draft                                   Sungkyunkwan Univ./ETRI
Obsoletes: 6106 (if approved)                                    S. Park
Intended status: Standards Track                     SAMSUNG Electronics
Expires: January 22, 2016                                     L. Beloeil
                                                      France Telecom R&D
                                                          S. Madanapalli
                                                       iRam Technologies
                                                           July 21, 2015

        IPv6 Router Advertisement Options for DNS Configuration
                  draft-ietf-6man-rdnss-rfc6106bis-00

Abstract

   This document specifies IPv6 Router Advertisement options to allow
   IPv6 routers to advertise a list of DNS recursive server addresses
   and a DNS Search List to IPv6 hosts.

   This document obsoletes RFC 6106 and allows a higher default value of
   the lifetime of the RA DNS options to avoid the frequent expiry of
   the options on links with a relatively high rate of packet loss.

Status of This Memo

   This Internet-Draft is submitted to IETF 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 January 22, 2016.

Copyright Notice

Jeong, et al.           Expires January 22, 2016                [Page 1]
Internet-Draft             IPv6 RA DNS Options                 July 2015

   Copyright (c) 2015 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
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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  . . . . . . . . . . . . . . .  5
     5.2.  DNS Search List Option . . . . . . . . . . . . . . . . . .  7
     5.3.  Procedure of DNS Configuration . . . . . . . . . . . . . .  8
       5.3.1.  Procedure in IPv6 Host . . . . . . . . . . . . . . . .  8
       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  . . . . . . . . . . . . . . . . . . . 13
     7.1.  Security Threats . . . . . . . . . . . . . . . . . . . . . 13
     7.2.  Recommendations  . . . . . . . . . . . . . . . . . . . . . 14
   8.  IANA Considerations  . . . . . . . . . . . . . . . . . . . . . 15
   9.  Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . 15
   10. References . . . . . . . . . . . . . . . . . . . . . . . . . . 15
     10.1. Normative References . . . . . . . . . . . . . . . . . . . 15
     10.2. Informative References . . . . . . . . . . . . . . . . . . 16
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