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Book Review: SDN and OpenFlow for Beginners by Vivek Tiwari

712 Words. Plan about 4 minute(s) to read this.

Vivek Tiwari gave me a copy of his book SDN and OpenFlow for Beginners with hands on labs in Kindle format to review. As SDN is a subject I’m interested in and have done some writing on myself, I agreed to review the book.

SDN and OpenFlow for Beginners promises in chapter 1 to be…

something that you can read in three or four sittings. A book that gives you an idea about SDN, helps you speak intelligently about it, enables you to ask intelligent questions, and even gives you the sense if this is something that you would want to pursue further.

On that promise, the book delivers completely. The book isn’t very long, is easy to read in plain-spoken English, and uses a number of analogies, comparing SDN to common objects in the real world.

The book is outlined as follows:

  • Chapter 1: Why this book?
  • Part I: What is SDN?
  • Chapter 2: What is SDN?
  • Chapter 3: A brief history of SDN / OpenFlow
  • Chapter 4: CAM, TCAM and OpenFlow
  • Chapter 5: Flow Table and Flows in OpenFlow
  • Chapter 6: OpenFlow
  • Chapter 7: OpenFlow in action
  • Chapter 8: OpenFlow Versions
  • Chapter 9: SDN Advantages
  • Chapter 10: SDN for the enterprise network
  • Chapter 11: SDN for service providers
  • Chapter 12: SDN for WAN
  • Chapter 13: SDN for Datacenter
  • Chapter 14: What does SDN mean for Companies like Cisco and Juniper?
  • Chapter 15: Hype or Reality
  • Chapter 16: The future
  • Part II: Hands on Labs on SDN using OpenFlow
  • Chapter 17: The Prerequisites
  • Chapter 18: Setting up the playground
  • Chapter 19: Lets play
  • Chapter 20: Snooping in on the conversation
  • Chapter 21: Ring !! Ring !!……. Ping!!
  • Chapter 22: Creating more topologies
  • Chapter 23: Creating custom topologies
  • Appendices
  • Appendix A – List of OpenFlow Software Projects
  • Appendix B – Setting up Floodlight Controller
  • Appendix C – Setting up OpenDaylight Controller
  • Appendix D – Mininet Reference
  • Appendix E – DPCTL reference
  • Appendix F – Making your own OpenFlow switch
  • Appendix G – Resources

As you can see from the layout, Vivek takes the reader down a logical progression regarding SDN and OpenFlow, laying a foundation, then building on top of it. Especially insightful and useful for me personally was Chapter 4 on how OpenFlow relates to certain memory operations in network switches. TCAM is one of those things that’s been on my list to research for a while, and Vivek reminds me to poke into this interesting topic even more deeply.

The perspective of the book aligns reasonably well with my impressions of the state of SDN right now, although the market is changing week by week. If you’re skeptical about Vivek’s emphasis on OpenFlow, I think it’s entirely appropriate considering the purpose of this book. OpenFlow is one of the few things in the SDN world that crosses vendors. OpenFlow is also one of the most accessible tools to demonstrate how SDN is different from traditional networking. Which, in fact, is exactly what Vivek does in Part II of the book. Using VMs, Vivek demonstrates how to use an SDN controller to program a virtual switch called mininet through OpenFlow. Following Vivek’s instructions & screenshots, anyone with a technical clue will be able to set up an OpenFlow lab on their workstation. That said, it’s worth pointing out that many vendor products de-emphasize OpenFlow, instead focusing on overlays like VXLAN to deliver network virtualization. Topically, Vivek doesn’t go in the overlay direction – which is fine. All the vendor approaches vary, so it would be a struggle to cover in such a laser-focused book.

SDN and OpenFlow for Beginners with hands on labs is available from Amazon for $7.99. That’s a fair price, in my opinion. If you are considering buying it in Kindle format, you might want to opt for a different format. While not a huge problem, this book suffered from the same challenges I’ve run into with almost every technical book I’ve gotten on Kindle: diagrams and screenshots are a bit of a pain to look at, and text formatting of fixed-width device output can suffer.

Update: I checked with Vivek, and there is no print version of this title available at this time. Your choices are Kindle or ePub via the iTunes store. That said, don’t let my complaints about formatting throw you. It’s not a big deal, just one of those things you deal with when reading technical e-books supported with illustrations or code output.

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