Cisco CNS Network Registrar User's Guide, 6.1
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Table Of Contents


Who Should Read This Guide

How This Guide Is Organized

Document Conventions

Network Registrar Documentation

Obtaining Documentation

Ordering Documentation

Documentation Feedback

Obtaining Technical Assistance

Cisco TAC Website

Opening a TAC Case

TAC Case Priority Definitions

Obtaining Additional Publications and Information


This section describes the reader, and the organization and conventions contained in this guide.

Who Should Read This Guide

This guide is designed for network managers who are responsible for maintaining the network DNS, DHCP, and TFTP servers. The network manager should be familiar with the following topics:

Basic concepts and terminology used in internetworking

Network topology and protocols

Note This guide describes configuring Cisco CNS Network Registrar using the Web-based user interface (Web UI) and command line interface (CLI).

How This Guide Is Organized

This guide describes how to become familiar with Network Registrar features so that you can use them to administer network addresses. The major sections of this guide are as follows:

Part 1

Getting Started

Chapter 1

Deploying Network Registrar

Introduces Network Registrar, its deployment scenarios, and some deployment guidelines.

Chapter 2

Network Registrar Components

Describes the Network Registrar management and protocol components.

Chapter 3

Network Registrar User Interfaces

Describes the Network Registrar local and regional Web user interfaces, and the command line interface (CLI).

Part 2

Local and Regional Administration

Chapter 4

Configuring Local and Regional Administrators

Describes how to configure the local and regional administrators, and provides administration tutorials.

Chapter 5

Managing the Central Configuration

Describes how to manage the central network configuration from the regional cluster.

Chapter 6

Maintaining Servers

Describes how to maintain the Network Registrar servers.

Chapter 7

Maintaining Databases

Describes how to maintain the Network Registrar databases, including backup and recovery, and utilities.

Part 3

Domain and Zone Administration

Chapter 8

Managing Zones

Describes how to manage zones

Chapter 9

Managing Resource Records and Hosts

Describes how to manage DNS resource records and create hosts in a zone.

Chapter 10

Setting DNS Attributes

Describes how to set more advanced DNS attributes.

Part 4

Dynamic Host Administration

Chapter 11

Configuring DHCP Scopes and Policies

Describes how to configure Dynamic Host Configuration Protocol (DHCP) scopes and policies.

Chapter 12

Managing Leases

Describes how to manage DHCP leases.

Chapter 13

Configuring Clients and Client-Classes

Describes how to configure DHCP clients and client-classes.

Chapter 14

Managing Advanced DHCP Server Properties

Describes how to manage more advance DHCP server properties.

Chapter 15

Configuring Dynamic DNS Update

Describes how to configure dynamic DNS update between the DNS and DHCP servers.

Chapter 16

Configuring DHCP Failover

Describes how to configure DHCP server failover relationships.

Chapter 17

Using Extension Points

Describes how to use extensions and extension points.

Part 5

Address Management

Chapter 18

Managing Address Space

Describes how to manage address blocks and subnets.

Chapter 19

Configuring Virtual Private Networks and Subnet Allocation

Describes how to configure DHCP servers to support virtual private networks (VPNs) and subnet allocation for on-demand address pools.

Part 6

Appendices, Glossary, and Index

Appendix A

Resource Records

Describes the DNS resource records.

Appendix B

DHCP Options

Describes the DHCP options.

Appendix C

DHCP Extension Dictionary

Describes the DHCP extension library.



Glossary of terms used in Network Registrar.



Index to the guide.

Document Conventions

This guide uses the following documentation conventions:

User input and controls are indicated in bold, such as "enter 1234" and "click Modify Scope."

Object attributes are indicated in italics, such as "the failover-safe-period attribute."

Cross-references to chapters or sections of chapter are indicated in blue, such as "see the "Document Conventions" section."

Windows systems use a two-button mouse. To drag and drop an object, click and hold the left mouse button on the object, drag the object to the target location, then release the button.

Solaris systems use a three-button mouse. To drag and drop an object, click and hold the middle mouse button on the object, drag the object to the target location, then release the button.

Screen displays can differ slightly from those included in this guide, depending on the system or browser you use.

Call-outs in the text have the following meaning:

Caution Be careful. The description alerts you to potential data damage or loss in the context.

Note Take note. The description is particularly noteworthy in the context.

Timesaver Save time. The description can present a timesaver in the context.

Tip Consider this helpful hint. The description can present an optimum action to take in the context.

Network Registrar Documentation

The Network Registrar version 6.1 documentation set consists of:

Documentation Guide for Cisco CNS Network Registrar, Release 6.1

Release Notes for Cisco CNS Network Registrar Release 6.1

Cisco CNS Network Registrar Installation Guide

Cisco CNS Network Registrar User's Guide

Cisco CNS Network Registrar CLI Reference

Obtaining Documentation

Cisco documentation and additional literature are available on Cisco also provides several ways to obtain technical assistance and other technical resources. These sections explain how to obtain technical information from Cisco Systems.

You can access the most current Cisco documentation on the World Wide Web at this URL:

You can access the Cisco website at this URL:

International Cisco websites can be accessed from this URL:

Ordering Documentation

You can find instructions for ordering documentation at this URL:

You can order Cisco documentation in these ways:

Registered users (Cisco direct customers) can order Cisco product documentation from the Ordering tool:

Nonregistered users can order documentation through a local account representative by calling Cisco Systems Corporate Headquarters (California, USA) at 408 526-7208 or, elsewhere in North America, by calling 800 553-NETS (6387).

Documentation Feedback

You can submit e-mail comments about technical documentation to

You can submit comments by using the response card (if present) behind the front cover of your document or by writing to the following address:

Cisco Systems
Attn: Customer Document Ordering
170 West Tasman Drive
San Jose, CA 95134-9883

We appreciate your comments.

Obtaining Technical Assistance

For all customers, partners, resellers, and distributors who hold valid Cisco service contracts, the Cisco Technical Assistance Center (TAC) provides 24-hour-a-day, award-winning technical support services, online and over the phone. features the Cisco TAC website as an online starting point for technical assistance. If you do not hold a valid Cisco service contract, please contact your reseller.

Cisco TAC Website

The Cisco TAC website provides online documents and tools for troubleshooting and resolving technical issues with Cisco products and technologies. The Cisco TAC website is available 24 hours a day, 365 days a year. The Cisco TAC website is located at this URL:

Accessing all the tools on the Cisco TAC website requires a user ID and password. If you have a valid service contract but do not have a login ID or password, register at this URL:

Opening a TAC Case

Using the online TAC Case Open Tool is the fastest way to open P3 and P4 cases. (P3 and P4 cases are those in which your network is minimally impaired or for which you require product information.) After you describe your situation, the TAC Case Open Tool automatically recommends resources for an immediate solution. If your issue is not resolved using the recommended resources, your case will be assigned to a Cisco TAC engineer. The online TAC Case Open Tool is located at this URL:

For P1 or P2 cases (P1 and P2 cases are those in which your production network is down or severely degraded) or if you do not have Internet access, contact Cisco TAC by telephone. Cisco TAC engineers are assigned immediately to P1 and P2 cases to help keep your business operations running smoothly.

To open a case by telephone, use one of the following numbers:

Asia-Pacific: +61 2 8446 7411 (Australia: 1 800 805 227)
EMEA: +32 2 704 55 55
USA: 1 800 553-2447

For a complete listing of Cisco TAC contacts, go to this URL:

TAC Case Priority Definitions

To ensure that all cases are reported in a standard format, Cisco has established case priority definitions.

Priority 1 (P1)—Your network is "down" or there is a critical impact to your business operations. You and Cisco will commit all necessary resources around the clock to resolve the situation.

Priority 2 (P2)—Operation of an existing network is severely degraded, or significant aspects of your business operation are negatively affected by inadequate performance of Cisco products. You and Cisco will commit full-time resources during normal business hours to resolve the situation.

Priority 3 (P3)—Operational performance of your network is impaired, but most business operations remain functional. You and Cisco will commit resources during normal business hours to restore service to satisfactory levels.

Priority 4 (P4)—You require information or assistance with Cisco product capabilities, installation, or configuration. There is little or no effect on your business operations.

Obtaining Additional Publications and Information

Information about Cisco products, technologies, and network solutions is available from various online and printed sources.

Cisco Marketplace provides a variety of Cisco books, reference guides, and logo merchandise. Go to this URL to visit the company store:

The Cisco Product Catalog describes the networking products offered by Cisco Systems, as well as ordering and customer support services. Access the Cisco Product Catalog at this URL:

Cisco Press publishes a wide range of general networking, training and certification titles. Both new and experienced users will benefit from these publications. For current Cisco Press titles and other information, go to Cisco Press online at this URL:

Packet magazine is the Cisco quarterly publication that provides the latest networking trends, technology breakthroughs, and Cisco products and solutions to help industry professionals get the most from their networking investment. Included are networking deployment and troubleshooting tips, configuration examples, customer case studies, tutorials and training, certification information, and links to numerous in-depth online resources. You can access Packet magazine at this URL:

iQ Magazine is the Cisco bimonthly publication that delivers the latest information about Internet business strategies for executives. You can access iQ Magazine at this URL:

Internet Protocol Journal is a quarterly journal published by Cisco Systems for engineering professionals involved in designing, developing, and operating public and private internets and intranets. You can access the Internet Protocol Journal at this URL:

Training—Cisco offers world-class networking training. Current offerings in network training are listed at this URL: