IPv6迁移指南：应用向新网络架构转型 - CSDN文库

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《迁移应用程序到IPv6》是一本由Dan York撰写的专著，全面探讨了将现有应用程序迁移到IPv6网络环境中的关键步骤和技术。IPv6是一种下一代互联网协议，相较于IPv4，它提供了更大的地址空间、更好的安全性以及更好的设备连接能力。随着互联网的普及和IPv4地址空间的枯竭，迁移至IPv6已经成为现代网络架构的必然趋势。这本书的主要内容包括但不限于以下知识点： 1. **IPv6基础知识**：首先，作者会介绍IPv6的核心原理，包括地址结构、报文头部设计、地址分配策略等，帮助读者理解IPv6的基本工作原理和优势。 2. **迁移策略**：针对不同类型的应用程序（如Web服务器、数据库、移动应用等），讨论如何评估当前系统对IPv6的支持程度，确定迁移的优先级和顺序，以及可能面临的挑战。 3. **网络架构调整**：涉及如何在现有的IPv4网络上部署双栈（同时运行IPv4和IPv6）或纯IPv6网络架构，确保无缝过渡期间服务的连续性。 4. **安全考虑**：IPv6增强了安全特性，如IPsec和DNSSEC，书中会讲解如何利用这些特性来增强应用程序的安全防护。 5. **性能优化**：探讨如何通过合理的配置和优化，提高IPv6环境下的应用程序性能，比如减少延迟、提高带宽利用率等。 6. **案例分析**：书中可能会包含实际的迁移案例研究，分享成功经验和教训，以便读者在实际操作中参考。 7. **工具和最佳实践**：介绍用于IPv6迁移的工具和技术，以及如何遵循最佳实践，确保迁移过程顺利进行。 8. **未来展望**：随着物联网、云计算和5G的发展，IPv6的重要性将进一步提升，书中也会提及未来的发展趋势和潜在的机遇。《Migrating Applications to IPv6》是一本实用的指南，不仅适合IT专业人员，对于网络管理员、系统工程师和希望了解IPv6迁移的任何人来说，都是一个宝贵的资源。通过阅读本书，读者能够掌握将现有应用程序成功迁移到IPv6环境的关键技能，以适应新时代的网络需求。

Preface

Why This Book?

How badly will IPv6 break your application? What do you need to consider to make

your application “IPv6-ready”? What questions should you ask?

In the ideal world, your application should “just work” on IPv6, just as it does on IPv4.

However, in the real world, application issues crop up. These could be as simple as

having a user interface field that only allows the input of dotted-decimal IPv4 addresses,

or something more fundamental, such as an application binding exclusively to an IPv4

transport interface.

While there have been many books published about IPv6, including O’Reilly’s own

IPv6 Essentials and IPv6 Network Administration, almost all existing books focus on

understanding the protocol itself and using it at a network layer. They contain much

discussion about using network-level tools and even about creating applications that

interact directly with the network. However, the concerns related to IPv6 at the upper

application layers are mentioned only briefly, if at all. The Internet Engineering Task

Force (IETF) has published RFC 4038, which addresses many of these concerns, but

the concerns have not found their way out into mainstream books.

This short book is designed to help you understand what you need to think about to

be sure that your app will work as well with IPv6 as it does with IPv4. This book is not

so much about all the solutions but rather about the questions you need to be asking.

For IPv6 to truly be adopted on a large scale, ultimately the applications running on our

desktop systems, laptops, and mobile devices all need to play nice with IPv6. That is

the end goal of this book—to help enable individuals, companies, and organizations

to migrate their apps to IPv6 so that they can transition their networks into IPv6

networks.

Given that now, in 2011, many companies are just starting to pay attention to IPv6,

and given that many apps are just now moving to IPv6, this book will continue to evolve

to address issues identified as more applications make the move. I’d love to receive any

feedback you have on issues you encounter in migrating your apps to IPv6—and I

expect that you’ll see updates to this book come out over time.

vii

Is This Book for You?

Are you an application developer? A product manager? A product marketing manager?

A documentation author? A training instructor? A system/network architect? This book

is designed to help you understand what issues you need to explore with your

application.

Developers, you will come away with enough information to go through your appli-

cation and make the necessary changes. Product managers, you will gain an under-

standing of what points you need to consider—and what you need to ask of your tech-

nical teams. If you are in marketing, documentation, or training, you will get a good

sense of what you’ll need to think about changing in your materials. And if you are a

system/network architect looking at your overall IPv6 implementation, you should

leave with a better sense of what changes may need to be considered across the appli-

cations that are deployed in your infrastructure.

This book is not a tutorial in the details of IPv6. The focus is on IPv6

issues as they relate to application developers and the book does not get

into topics such as network-layer changes between IPv4 and IPv6. If you

would like to gain a deeper understanding of IPv6, I recommend also

reading IPv6 Essentials by Silvia Hagen.

What Is in the Book?

To start your dive into IPv6 application migration, Chapter 1, User Interface

Changes, explores one of the biggest ways that IPv6 may impact your application: all

the many little tweaks you may need to make to your user interfaces. These could be

changes to your display or input fields—or something more subtle, like the fact that

you may have to think about capitalization in IP addresses.

Chapter 2, DNS Changes, explains the new DNS records for IPv6 addresses and explains

how a “happy eyeballs” approach can get users the information they want in the fastest

way possible.

Chapter 3, Application Programming Interfaces (APIs), raises questions around APIs,

both those your app provides and those your app uses, and how they treat IP addresses.

Chapter 4, Storage of IP Addresses, wraps up this first bit of the book by exploring how

you store the IPv6 addresses you receive from user input, DNS, or APIs. If you store

them in a memory location, is the location big enough or will there be a buffer overflow?

Can a configuration file accommodate both IPv4 and IPv6 address types?

Chapter 5, Transport Layer, drops down briefly into the network layer to discuss issues

application developers may need to think about. Does your application work in a dual-

stack system? Will it bind to both addresses? Does it need to care about multiple IPv6

addresses or about IPv6 privacy extensions? And is NAT a concern at all?

viii | Preface

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