using ipv6

How to plan your migration to IPv6

By Mark Dargin

With the depletion of IPv4 addresses, more organizations are encouraged to transition over to using IPv6 addresses. Many organizations are noticing the benefits of the built-in security features of IPv6. Also, enterprise IT managers are observing that their service providers are successfully using IPv6, and this encourages them to move forward with it.

To continue to ignore IPv6 could cause any number of potential problems, including an inability to immediately migrate to IPv6 when there is no longer a choice, loss of internet connectivity, and not being able to compete with organizations whose systems are configured for IPv6.

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Time to consider a move to IPv6

By Mark Dargin

Organizations should consider migrating their network infrastructure and devices over to IPv6. It may be a challenge to persuade leadership to prioritize it over other projects such as cloud computing or big data migrations, but it is essential to start planning for a migration.

Many service providers, such as Comcast, Verizon and AT&T, have already started using IPv6 addresses and are presently encouraging other organizations across the United States to do the same. The Internet Engineering Task Force (IETF) has encouraged organizations to move forward with these migrations for over a decade, and with more devices connecting to the internet, the need has increased.

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Researches Demonstrate How IPv6 Attacks Can Bypass Network Intrusion Detection Systems

With the increasing popularity of IoT devices and the added interest of transition to IPv6, a whole new range of threat vectors are evolving that allow attackers to set up undetectable communications channels across networks. Juha Saarinen reporting in iTnews: “A paper has been published by researchers at the NATO defence alliance’s Cooperative Cyber Defence Centre of Excellence and Estonia’s Tallinn University of Technology. It outlines how attackers can create covert data exfiltration channels and system remote control, using IPv6 transition mechanisms. … The researchers developed proofs of concept with tunnel-based IPv6 transition tools over IPv4-only, or IPv4/IPv6 dual-stack networks, that were able to pass traffic undetected by common network intrusion detection systems (NIDS) such as Snort, Suricata, Bro and Moloch.”

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Book review – IPv6 Fundamentals: A Straightforward Approach to Understanding IPv6

There are many IPv6 books around nowadays with many different approaches to the subject. IPv6 Fundamentals: A Straightforward Approach to Understanding IPv6 by Rick Graziani is an excellent book that will help you fully understand the fundamentals of IPv6. It has a great balance of theory and practical information and is a good starting point for learning about IPv6. Other IPv6 books can be found on our books and e-books pages. We have included a number of Amazon reader reviews below:

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Graziani provides straightforward understanding.
By M.B. Reynolds on June 5, 2013

The title of the book is an accurate depiction of the contents of this work. The material is presented in a straightforward, methodical manner. The material is presented with understanding and teaching in mind utilizing repetition, sample code, examples, and review. The book is primarily a walk through the various Internet Engineering Task Force (IETF) Requests for Comments (RFC) that comprises the aspects, features, and options of IPv6. Most of these RFC walkthroughs are accompanied with Cisco IOS example code for setting up a router to implement the RFC.

After some of these examples, output from a packet sniffer demonstrates the changes to the packet headers. The book finishes with mechanisms for implementing mixed IPv4 and IPv6 environments and approaches to transitioning from IPv4 to IPv6. Additional references and notes point the reader to more details or topics not covered by the book. Overall I certainly recommend this book as a starting point into IPv6 if the reader has some IPv4 and routing experience. I believe for the novice an additional more general book on networking should be digested first.
The book covers the Internet history and the motivation of IPv6. The IPv6 headers and Extension headers are presented in (again) a straightforward explanation with plenty of diagrams and tables. This explanation includes the specific differences between IPv4 and IPv6 headers. A nice overview of IPSec headers includes authentication, transport, and tunneling modes. Chapter four outlines the multitude of unicast, multicast, and anycast address types. The Neighborhood Discovery Protocol is a new feature of Internet Control Message Protocol version 6 (ICMPv6). Graziani shows ICMPv6 with its enhancements is an important change in how IP hosts identify themselves and others hosts and routers on the network.

The middle of the book discusses IPv6 configuration and routing. Initially, a router is configured from scratch with the various address types. The same example configuration and network is nicely used through the middle of the book. This method is useful for continuity and context. Building on this initial configuration static routes and routing tables are built. The old and new RIPng, EIGRP, and OSPF are compared and contrasted in Chapter 8. The middle ends with Dynamic Host Configuration Protocol version 6 (DHCPv6). The new features such as stateless & stateful DHCP and relay agents are covered. Some interesting differences in Domain Name Service (DNS), TCP, and UDP are explained.

The book ends with mixed IPv4 and IPv6 environments. Graziani shows dual stack allows for parallel IPv4 and IPv6 networks. He covers tunneling methods such as 6to4 and ISATAP that allow for IPv6 packets to be encapsulated in IPv4 packets and routed through an IPv4 network. He shows this allows for a smooth transition from IPv4. Finally Network Address Translation IPv6 to IPv4 (NAT64) is walked through. He shows this allows and IPv4 address to be mapped to a IPv6 address and vice versa to allow coexisting IPv4 and IPv6 networks to communicate.


One of the most substantial changes from IPv4 to IPv6 is the addresses and their types. After introducing hexadecimal and the address format short hands, Graziani explains well the structure of the new 128-bit address: prefix, subnet, and interface id.

After trying others – THIS is THE BOOK!
By John Scott on March 22, 2013

The review written by Cosmic Traveler says it well. I purchased 2 other books before this one and they both ended up on the bottom shelf of my bookshelf. I ordered this one and I couldn’t put it down. If the mere thought of a 128-bit address represented in hexadecimal format makes your hair stand up, you need to order this book and then go have a glass of wine – or a cold beer.

By Matthew Petersen on February 14, 2014

To support future business continuity, growth, and innovation, organizations must transition to IPv6, the next generation protocol for defining how computers communicate over networks. IPv6 Fundamentals provides a thorough yet easy-to-understand introduction to the new knowledge and skills network professionals and students need to deploy and manage IPv6 networks.

Excellent book, highly recommended!
By MSG causes migraines on October 15, 2013

Even though I have been a CCIE since the 1990s and have dealt with IPv6 successfully on the re-certification exams, this book added a lot of needed clarity on the context and usage of IPv6 so the concepts are more readily absorbed and made intuitive. For those network engineers not yet exposed to IPv6 due to their individual customer/employer situations, it is a near-term reality everyone is going to have to deal with as the IPv4 private addressing RFC 1918 (and the updated IPv4 content in RFC 6761) cannot eliminate the reality that IPv4 is nearing address depletion.
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By COSMIC TRAVELER on November 17, 2012

Are you a network engineer; network designer; network technician; part of the technical staff; and, networking student, including those of the Cisco Networking Academy; who are seeking a solid understanding of the fundamentals of IPv6? If you are, then this book is for you! Author Rick Graziani, has done an outstanding job of writing a book that focuses on the basics of IPv6.

Author Graziani, begins by discussing how the Internet of today requires a new network layer protocol, Ipv6, to meet the demands of its users. Then, the author examines the Ipv6 protocol and its fields. Next, he introduces IPv6 addressing and address types. The author continues by examining the different types of IPv6 addresses in detail. Then, he examines ICMPv6. The author then illustrates the configuration of IPv6, addressing the use of a common topology. Next, he examines the IPv6 routing table and changes in the configurations pertaining to IPv6. The author continues by discussing three routing protocols: RIPng, EIGRP for IPv6 and OSPFv3. Then, he examines DHCP for IPv6 or DHCPv6. The author then covers two of three strategies for IPv4 and IPv6 integration and coexistence: dual-stack and tunneling. Finally, he discusses the third technique for transition from IPv4 and IPv6: Network Address Translation or NAT.

This most excellent book provides a thorough yet easy-to-understand introduction to IPv6. More importantly, this great book is also intended to provide a foundation in IPv6 that will allow you to build on it.

Great book to begin IPv6 study
By Cord Scott on March 22, 2013

Really like this book. Information is accurate and concise and concentrates on the protocol and not just how to configure Cisco gear for IPv6, which is what too many people look for. Not a whole lot on migration but Cisco Press has another book that deals with that.

Everyone should start IPv6 with this book
By Andras Dosztal on May 13, 2013

Detailed but still easy to understand, having a good balance of theory and practical knowledge. Up to date, covers all topics needed for someone who’s getting familiar with IPv6. Having prior IPv4 and routing knowledge is recommended.

[amazon template=add to cart&asin=1587143135] website renewed and improved

IPv6 desktopIt was much needed. Especially now that Google ranks sites based on how well they do on mobile devices. Time for a major overhaul of our website. We’ve moved it from a way too old Joomla setup to state of the art WordPress site. Joomla appears to be dying slowly anyway. It’s much faster and completely responsive which means it will automatically adjust its layout to smaller mobile screens. Very cool.

At the same time we have removed some of the less popular parts like the forums. They were being used by spammers mostly. And we don’t like those.. We have improved the #ipv6 twitter stream and added a shop where you can find the coolest t-shirts and other IPv6 related things like mugs and stickers. There’s no place like ::1, right? We have partnered with Zazzle for this so get yourself one of those cool shirts today!

We’ve also improved the book shop so you will be automatically directed to your local Amazon site for all your IPv6 purchases. We have also added a selection of IoT (Internet of Things) books since this subject is highly linked to IPv6.