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Selection and Operation of Secondary DNS Servers (RFC2182)

IP.com Disclosure Number: IPCOM000002741D
Original Publication Date: 1997-Jul-01
Included in the Prior Art Database: 2000-Sep-13
Document File: 10 page(s) / 26K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

R. Elz: AUTHOR [+4]

Abstract

The Domain Name System requires that multiple servers exist for every delegated domain (zone). This document discusses the selection of secondary servers for DNS zones. Both the physical and topological location of each server are material considerations when selecting secondary servers. The number of servers appropriate for a zone is also discussed, and some general secondary server maintenance issues considered.

This text was extracted from a ASCII document.
This is the abbreviated version, containing approximately 11% of the total text.

Network Working Group R. Elz

Request for Comments: 2182 University of Melbourne

BCP: 16 R. Bush

Category: Best Current Practice RGnet, Inc.

S. Bradner

Harvard University

M. Patton

Consultant

July 1997

Selection and Operation of Secondary DNS Servers

Status of this Memo

This document specifies an Internet Best Current Practices for the

Internet Community, and requests discussion and suggestions for

improvements. Distribution of this memo is unlimited.

Abstract

The Domain Name System requires that multiple servers exist for every

delegated domain (zone). This document discusses the selection of

secondary servers for DNS zones. Both the physical and topological

location of each server are material considerations when selecting

secondary servers. The number of servers appropriate for a zone is

also discussed, and some general secondary server maintenance issues

considered.

Contents

Abstract ................................................... 1

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

2 Definitions ................................................ 2

3 Secondary Servers .......................................... 3

4 Unreachable servers ........................................ 5

5 How many secondaries? ...................................... 7

6 Finding Suitable Secondary Servers ......................... 8

7 Serial Number Maintenance .................................. 9

Security Considerations .................................... 11

References ................................................. 11

Acknowledgements ........................................... 11

Authors' Addresses ......................................... 11

1. Introduction

A number of problems in DNS operations today are attributable to poor

choices of secondary servers for DNS zones. The geographic placement

as well as the diversity of network connectivity exhibited by the set

of DNS servers for a zone can increase the reliability of that zone

as well as improve overall network performance and access

characteristics. Other considerations in server choice can

unexpe...