Guess what CIO: there is a revolution that is just starting in the world of computer networking. Sure, you know about the importance of information technology but are you going to be ready for this? For the longest time, we’ve all been building our networks in pretty much the same way: we go to a big equipment vendor such as Cisco, Juniper, HP, IBM, etc. and buy a bunch of boxes. We then string them together, get some expensive software and then sit back and hope that everything connects together. It turns out that there is a better way to do all of this.
Say Hello To Software Defined Networking
What has changed for person with the CIO job is that a new way of building computer networks has arrived. The new approach is called Software Defined Networking or SDN. In the world of SDN, your network will no longer be populated by a bunch of very smart boxes from Cisco. Instead, you’ll be buying dumb white label boxes and deploying them throughout your network. Once you’ve done this, you’ll then install a very powerful server at the heart of your network and you’ll run a fancy control program on it to control all of your “dumb” network elements.
The basic idea behind SDN is to centralize all of the intelligence in a network. Instead of distributing your processing power throughout each piece of expensive networking gear that you add to your network, you now place all of your network smarts in one place. One big advantage of doing things this way is that updating your network software just go a lot easier: you now only have to update the software that is running on one server, not on the 100’s of boxes that you have deployed in your network.
SDN provides a lot of other benefits. Network equipment costs should be lowered dramatically because you’ll no longer need “smart” boxes. When a network failure occurs, the network routing protocol that is running on the central server should be able to converge faster because it has a god’s- eye view of every thing that is happening in the network.
This Changes Everything
As the person in the CIO position, you need to grasp just exactly what the implications that the arrival of SDN networks may mean for your organization. What we are seeing is a fundamental shift in how computer networks are going to be built. We are moving away from computer networks that are defined by their hardware and moving towards computer networks that are being implemented primarily in software. The implications of this are quite large.
When you implement a computer network in software, you now have the ability to change how the network behaves not by sending a technician out to reconfigure hardware, but rather by making changes to the software that is running your network. This means that you’ll be able to adapt your computer network to the environment that it finds itself in much quicker than you have ever been able to do before.
Although this SDN stuff may strike you as being the stuff of academic fantasy, what you need to understand is that SDN has already arrived. Over at Google they have taken one of the primary backbone networks that they use to interconnect their data centers and converted to to now use SDN technology. The results have been nothing less than spectacular. They are now doing a much better job of utilizing the links that run between their data centers and they are able to test the impact of network configuration changes long before they deploy them into the network.