IPv6 Address Planning by Coffeen, Tom -- Read -- Imperial Library of Trantor

Index

IPv6 Address Planning Foreword Dedication Preface

Who Should Read This Book Why I Wrote This Book Navigating This Book

Part I

Chapter 1, Where We’ve Been, Where We’re Going Chapter 2, What You Need to Know About IPv6 Addressing Chapter 3, Planning Your IPv6 Deployment Chapter 4, IPv6 Subnetting

Part II

Chapter 5, IPv6 Address Planning Concepts Chapter 6, Getting IPv6 Addresses Chapter 7, Creating an IPv6 Addressing Plan

Part III

Chapter 8, Working with IPAM and DDI Chapter 9, Managing Growth and Change Chapter 10, Keeping Your IPv6 Addresses Reachable

Conventions Used in This Book Safari® Books Online How to Contact Us Technical Reviewers Acknowledgments

1. Where We’ve Been, Where We’re Going

Introduction All the Stars in the Universe… In the Beginning A Dilemma of Scale IPv4 Exhaustion and NAT IPv6 Arrives Why Not a “Flag Day” for IPv6? Conclusion

I. Preparation

2. What You Need to Know About IPv6 Addressing

Representation Structure Types

Unicast Addresses Multicast Addresses Anycast Addresses The Unspecified Address

Protocol Improvements Subnetting Host Bits

Loopback Addresses Point-to-Point Link Subnets

Host Address Assignment The Problem with NAT Practical Example: Production Loopback Addresses

3. Planning Your IPv6 Deployment

Introduction The IPv6 Business Case You Already Have IPv6 Adoption as a Cross-Functional Initative A Phased Approach to IPv6 Adoption Phase 1: Preparation

Management Buy-in Training Creating an IPv6 Task Force Auditing Hardware and Software for IPv6 Support Verifying That Your ISP Supports IPv6 Obtaining an IPv6 Address Allocation

Phase 2: External Adoption

Dual-Stack Eyeballs Are Happy Eyeballs

Phase 3: Internal Adoption

Reliance on NAT IPv6 Business Case Redux IPv6 (In)Security Internal Adoption and Operational Wisdom

II. Design

4. IPv6 Subnetting

Introduction Subnetting IPv4: A Brief Review A Note on Efficiency Nibble Boundaries Prefix Legibility Visualizing Hierarchy Non-Nibble Subnetting A Bit to the Left, a Bit to the Right

Subnets from the Right-Most Bits Subnets from the Left-Most Bits Subnets from the Middle Bits

Using Only Numeric Subnets ipv6gen

5. IPv6 Address Planning Concepts

Introduction IPv6 Address Planning Principles

Properly-Sized Initial IPv6 Allocations Sparse Assignment of Subnets Hierarchical Organization of Subnets Uniform Subnetting and Summarization Subnets in Reserve

Why Don’t I Use My Existing IPv4 Plan in IPv6? Address Plan Structure What Is a Site? Intra-Site Versus Inter-Site Planning IPv6 Allocation Methods

Best-Fit Allocation Sparse Allocation N+1 Allocation Random Allocation

Assigning Subnets by Location or Function VLAN-Mapped IPv6 Addresses Summary

6. Getting IPv6 Addresses

Introduction The IP Address Supply Chain So Where Will Your IPv6 Addresses Come From?

How Many ISPs Do You Connect To? How Large Is Your Organization? So Why Doesn’t Everyone Just Get a PI Allocation?

Everything You Didn’t Realize You Wanted to Know About RIR Policy Measuring IPv6 Address Consumption Determining Initial Allocation Size Navigating the IPv6 Address Request Process

RIR Allocation Request ISP Allocation Request

Summary

7. Creating an IPv6 Addressing Plan

Introduction Meet Strangelove Solutions, LLC

Edge Network Campus Network Lab Network Data Center Network Infrastructure

Where to Start: Topology or Plan? Mapping Topology to Plan Between Sites Mapping Plan to Topology Within Sites Function and Location Assignment Revisited

Assigning Function and Location

Addressing the Data Center Summary

III. Maintenance

8. Working with IPAM and DDI

Introduction IP Address Management

IPAM as a Cornerstone of Network Management Why More Than 1.8x1019 Addresses Aren’t a Substitute for Proper IPAM IPAM Policy IPAM Features

Example: Using IPAM Software

Adding an IPv6 Prefix Splitting an IPv6 Prefix Creating Reverse-Mapping DNS Zones

DDI: IPAM with 200% More Goodness Managing DHCPv6 and IPv6 DNS DHCPv6 Basics

Configuring DHCPv6 in DDI DHCPv6 Challenges

DUID versus MAC

IPv6 DNS Considerations in DDI

IPv6 DNS Basics Configuring IPv6 DNS in DDI

Summary

9. Managing Growth and Change

Introduction Renumerology: IP Renumbering Made Easy…(or Somewhat Less Painful)

The Lifetime and State of an Autoconfigured Address Preparing to Renumber

An IPv6 renumbering checklist Address abstraction Address lifetimes and DNS TTLs

The Renumbering Method Frequent Renumbering

Unplanned Growth An Address in Cloud City The Internet of Things

Characteristics of IoT Devices IPv6 Address Planning for IoT Deployments Three Suggestions for IoT IPv6 Address Assignments

Summary

10. Keeping Your IPv6 Addresses Reachable

Introduction Routing with IPv6 Selecting Your IPv6 Routing Protocol(s)

Operational Continuity Distance Vector and Link State Routing Protocols

Dual-Stack…but Not Necessarily Dual Topology

IS-IS for IPv6: Single-topology or Multi-topology Mode OSPFv3 Address Families MP-BGP

Routing Table Size and TCAM Space

RIB versus FIB

Mars Needs IP Address Blocks

Attack of the Bogons! Filtering Bogons

Summary

Glossary A. Planning Worksheets B. IPv6 Prefix Maps C. Recommended Reading

Index Colophon Copyright

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