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DNS Extensions to Support IPv6 Address Aggregation and Renumbering (RFC2874)

IP.com Disclosure Number: IPCOM000003475D
Original Publication Date: 2000-Jul-01
Included in the Prior Art Database: 2000-Sep-13
Document File: 16 page(s) / 41K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

M. Crawford: AUTHOR [+3]

Abstract

This document defines changes to the Domain Name System to support renumberable and aggregatable IPv6 addressing. The changes include a new resource record type to store an IPv6 address in a manner which expedites network renumbering and updated definitions of existing query types that return Internet addresses as part of additional section processing.

This text was extracted from a ASCII Text document.
This is the abbreviated version, containing approximately 7% of the total text.

Network Working Group M. Crawford

Request for Comments: 2874 Fermilab

Category: Standards Track C. Huitema

Microsoft Corporation

July 2000

DNS Extensions to Support IPv6 Address Aggregation and Renumbering

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 (2000). All Rights Reserved.

Abstract

This document defines changes to the Domain Name System to support

renumberable and aggregatable IPv6 addressing. The changes include a

new resource record type to store an IPv6 address in a manner which

expedites network renumbering and updated definitions of existing

query types that return Internet addresses as part of additional

section processing.

For lookups keyed on IPv6 addresses (often called reverse lookups),

this document defines a new zone structure which allows a zone to be

used without modification for parallel copies of an address space (as

for a multihomed provider or site) and across network renumbering

events.

Table of Contents

1. Introduction ............................................... 2

2. Overview ................................................... 3

2.1. Name-to-Address Lookup ............................... 4

2.2. Underlying Mechanisms for Reverse Lookups ............ 4

2.2.1. Delegation on Arbitrary Boundaries ............. 4

2.2.2. Reusable Zones ................................. 5

3. Specifications ............................................. 5

3.1. The A6 Record Type ................................... 5

3.1.1. Format ......................................... 6

3.1.2. Processing ..................................... 6

3.1.3. Textual Representation ......................... 7

3.1.4. Name Resolution Procedure ...................... 7

3.2. Zone Structure for Reverse Lookups ................... 7

4. Modifications to Existing Query Types ...................... 8

5. Usage Illustrations ........................................ 8

5.1. A6 Record Chains ..................................... 9

5.1.1. Authoritative Data ............................. 9

5.1.2. Glue ........................................... 10

5.1.3. Variations ..................................... 12

5.2. Reverse Mapping Zones ................................ 13

5.2.1. The TLA level .......