The Software-Defined Social Network — Facebook’s High-Capacity WAN

Facebook’s datacenters at the edge of the Arctic Circle in Lulea, Sweden need to have sufficient connectivity to provide performance, now and in the future, for all the activities Facebook believes its users will be carrying out. Your average wide area network connectivity is not an option for Facebook – leased lines would just be […]

Should Enterprise Take a Big Bang Approach To NFV?

As the interest in SDN continues to increase, we are also seeing growing interest in a related network architecture: Network Functions Virtualization (NFV). Organizations that are evaluating the viability of NFV have to make a key decision early on: Should they go forward with a piecemeal approach or should they go for a big bang […]

4 Reasons Why IPv6 Has Not Taken Off – And 3 Why It Should

Some time back, I had a chat with the UK’s Southampton University School of Electronics and Computer Science (ECS) group around IPv6.  The warnings were of disaster caused by the lack of IPv4 addresses and the chaos that would then ensue. Making a few points to the ECS team, they were not impressed with my […]

SDN — An Apology

OK.  I admit it.  When I first started looking into SDN, I fell for it.  Hook, line, sinker… in fact. the fishing rod and the fisherman as well.  The simplicity of it all was so dazzling that I suspended my normal cynicism and went for it.  SDN was going to change the world — Cisco, […]

The Internet of Things vs. The Network

I remember the days of hooking my computer up to a 1200/75 baud modem, listening to the squeaks and burrs of it handshaking with the other end of the connection and then having to do whatever I wanted to do online as quickly as possible to avoid massive telephone costs. When broadband came along with […]

Business Thrives When Applications Become Services

With a basic web application, the user sends a request over the network to a server that returns the application or content to the user’s browser. The browser simply renders and displays the information from the formatted pages sent from the server. However, many of today’s web applications are much more complex with a lot […]

If Content Is King, The Network Is The Queen

The game of chess requires a keen awareness of the positions for all the pieces, both yours and your opponent’s. Chess requires patient planning and vision; each piece has a different value, and some are more strategic than others. Of most importance is maintaining the safety of the king, by controlling squares on the board. […]

It’s Time to Chop Down the Spanning Tree

I believe it was the esteemed singer/songwriter, John Lennon, who uttered the words: “Imagine there’s no spanning tree, it’s easy if you try, No multi-tiers below us, just a flat network like the sky, Imagine all the users, living for the apps…” I recently spoke at Avaya’s Technology Forum, the company’s data networking event (yes, […]

Factors Driving WAN Evolution

In a blog entry I wrote at the end of last year I pointed out that while the LAN is going through a period of rapid change, there are few if any fundamentally new WAN technologies under development.  As a result, when IT organizations look to evolve their WAN they need to do so based […]

Don’t Let Your Network Suffer From Tunnel Vision

“Tunnel Vision” is a medical condition involving a loss of one’s peripheral vision, but most also know the term as a description of a certain mentality: the tendency to focus on a narrow or limited point of view or perspective. Most, if not all, organizations have many applications going over WANs. They may even have […]