What’s Holding Back SD-WAN Adoption?
What’s Holding Back SD-WAN Adoption?
/ Nov 24, 2015 0 COMMENTS

The emergence of a fundamentally new technology or an approach to implementing technology is typically followed by a spate of articles that describe the use cases for that technology or approach. We have certainly seen that over the last year or two with software defined WANs (SD-WANs). Identifying the use cases is important, but use…

Is 2016 the year of the SD-WAN?
Is 2016 the year of the SD-WAN?
/ Nov 9, 2015 0 COMMENTS

A year ago we seldom if ever heard the phrase software-defined WAN (SD-WAN). Now we are continually inundated by articles that discuss SD-WANs and their value proposition. While it is always interesting to hear what industry analysts and press think about a new technology or architecture, I think it is more interesting to hear the…

What’s Up with the ONF?
What’s Up with the ONF?
/ Sep 29, 2015 0 COMMENTS

The Open Networking Foundation (ONF) is the organization that is most closely associated with the development and standardization of SDN. As of September 2015, the ONF had over 140 members. Given its size and its tight association with SDN, in order to understand where we are with the evolution of SDN we have to be…

So Which Is It:  NFV or NSV?
So Which Is It: NFV or NSV?
/ Sep 17, 2015 0 COMMENTS

Because I am sensitive to the fact that I am a recovering academic I am hesitant to get drawn into any “How many angels can dance on the head of a needle”-type discussions. Recently, however, I have found myself being drawn into discussions with people who associate NFV (Network Functions Virtualization) strictly with service providers….

Why not do a SD-WAN Proof-of-Concept?
Why not do a SD-WAN Proof-of-Concept?
/ Sep 1, 2015 0 COMMENTS

Most network organizations don’t have people in the organization who have a lot of free time on their hands. In addition, if there are some resources that can be freed up to analyze the possibility of introducing new functionality into the network, there are lots of competing candidates for what functionality to analyze. Given that,…

Where Do We Stand With The WAN?
Where Do We Stand With The WAN?
/ Jul 30, 2015 0 COMMENTS

A lot has been written over the last year about how SDN will fundamentally change how enterprise WANs are architected. While I generally agree with that statement, I think it is important to not get too far ahead of ourselves. Before we implement any new networking technology or architecture we always have to answer a…

ONS Shows the Status of SDN in the Enterprise
ONS Shows the Status of SDN in the Enterprise
/ Jul 21, 2015 0 COMMENTS

There were over 1,300 attendees at the recent Open Networking Summit (ONS) in Santa Clara making the ONS one of, if not the largest SDN-focused conference in the world. Because conferences such as the ONS provide good insight into what leading-edge users are doing, it’s interesting to ask: What were the leading edge enterprise users…

Is Moore’s Law Going To Be Repealed?
Is Moore’s Law Going To Be Repealed?
/ Jun 30, 2015 0 COMMENTS

I recently attended the Open Networking Summit in Santa Clara. During a morning keynote session one of the speakers started to discuss his company’s SDN architecture, and made a comment on how that architecture is impacted by the fact that Moore’s Law is either dead, or soon will be dead. It was early in the…

How Do I Build A Business Case for a WAN Upgrade?
How Do I Build A Business Case for a WAN Upgrade?
/ Jun 23, 2015 0 COMMENTS

In a previous blog I described a framework that can be used to build a business case to justify a WAN upgrade. A framework is important but having a framework still leaves open a critical question: How do I actually construct a compelling business case? A business case based on hard savings In virtually every…

How Can You Go From WAN Theory to SD-WAN Reality?
How Can You Go From WAN Theory to SD-WAN Reality?
/ Jun 11, 2015 0 COMMENTS

In the last few months a lot of articles have been written about the WAN in general, and about Software-Defined WANs (SD-WANs) in particular. These articles typically point out the well-known limitations of the current approach to wide area networking and discuss how to apply a variety of techniques, both old and new, to the…