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DNS Configuration options for Dynamic Host Configuration Protocol for IPv6 (DHCPv6) (RFC3646)

IP.com Disclosure Number: IPCOM000020599D
Original Publication Date: 2003-Dec-01
Included in the Prior Art Database: 2003-Dec-02
Document File: 8 page(s) / 13K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

R. Droms: AUTHOR [+2]

Abstract

This document describes Dynamic Host Configuration Protocol for IPv6 (DHCPv6) options for passing a list of available DNS recursive name servers and a domain search list to a client.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 31% of the total text.

Network Working Group R. Droms, Ed.

Request for Comments: 3646 Cisco Systems

Category: Standards Track December 2003

DNS Configuration options for Dynamic Host

Configuration Protocol for IPv6 (DHCPv6)

Status of this Memo

This document specifies an Internet standards track protocol for the

Internet community, and requests discussion and suggestions for

improvements. Please refer to the current edition of the "Internet

Official Protocol Standards" (STD 1) for the standardization state

and status of this protocol. Distribution of this memo is unlimited.

Copyright Notice

Copyright (C) The Internet Society (2003). All Rights Reserved.

Abstract

This document describes Dynamic Host Configuration Protocol for IPv6

(DHCPv6) options for passing a list of available DNS recursive name

servers and a domain search list to a client.

1. Introduction

This document describes two options for passing configuration

information related to Domain Name Service (DNS) (RFC 1034 [6] and

RFC 1035 [1]) in DHCPv6 (RFC 3315 [2]).

2. Terminology

The key words MUST, MUST NOT, REQUIRED, SHALL, SHALL NOT, SHOULD,

SHOULD NOT, RECOMMENDED, MAY, and OPTIONAL in this document are to be

interpreted as described in BCP 14, RFC 2119 [3].

Throughout this document, unless otherwise specified, the acronym

DHCP refers to DHCP for IPv6 (DHCPv6) as specified in RFC 3315.

This document uses terminology specific to IPv6 and DHCP as defined

in section "Terminology" of RFC 3315.

Droms Standards Track [Page 1]

RFC 3646 DNS Configuration Options for DHCPv6 December 2003

3. DNS Recursive Name Server option

The DNS Recursive Name Server option provides a list of one or more

IPv6 addresses of DNS recursive name servers to which a client's DNS

resolver MAY send DNS queries [1]. The DNS servers are listed in the

order of preference for use by the client resolver.

The format of the DNS Recursive Name Server option is:

0 1 2 3

0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1

+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

| OPTION_DNS_SERVERS | option-len |

+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

| |

| DNS-recursive-name-server (IPv6 address) |

| |

| |

+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

| |

| DNS-recursive-name-server (IPv6 address) |

| |

| |

+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

| ... |

+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

option-code: OPTION_DNS_SERVERS (23)

option-len: Length of the list of DNS recursive name

servers in octets; must be a multiple of

16

DNS-recursive-name-server: IPv6 address of DNS recursive name server

4. Domain Search List option

The Domain Search List option specifies the domain search list the

client is to use when resolving hostnames with DNS. This option does

not apply to other name resolution mechanisms.

Droms Standards Track [Page 2]

RFC 3646 DNS Configuration Options for DHCPv6 December 2003

The format of the Domain Search List o...