Big or Small, enterprise WANs are no longer the old simple hardware put together with an administration tool to manage the network. It has become a complex and costly affair of putting together hardware and software together and with cloud computing and cloud WANs coming into the scene the degree of complexity has only increased. Thats why moving forward its more common to turn to professionals; like the ones at http://www.velocloud.com/
So what are you dealing with? Routers, Fiber, Transport gear, the shortest possible path routing and convergence time, traffic differentiation and no matter what happens strike a good score in all the parameters of your Service Level Agreement (SLAs) plus you are also looking into the operational costs, which has to be as low as possible, and a high on efficiency.
For that matter, any large-scale organization would be happy with the use of broadband-based technology for their intranet and internet traffic routing and to safely handover, their more important mission critical work to technologies like Dynamic Multipoint VPNs and Cisco Performance Routing over their own private MPLS links. Then they are dealing with a higher level of complexity where a higher level of expertise needs to be deployed. This is where you will see software defined WANs stepping into the scene.
We make a case study for overhauling the current network system to make the best of what software-defined enterprise WAN has to offer and keep the competitive edge in business. With more and more users and enterprise shifting from their own WAN to the cloud, the limitation of their existing WAN could become a handicap. The cloud service provider would probably give you clean SLAs; however, we need to look into the traffic management outside their perimeter of control. Many enterprises are looking into newer solutions to overcome this bottleneck by tapping into the potentials of the promising software defined WAN technologies. This technology is implemented by deploying software solutions to shift the control logic and their policy management and abstraction of variability of underlying boxes and connections of the hardware thereby giving you the much-needed intelligence to accommodate the network conditions and unforeseen events.
So having said so much about it lets look at where and how software defined WANs are implemented into the networking system. There are SD WANs e.g. that is mounted above the Cisco’s policy modules that orchestrate the WAN in the router. Many other technologies do exists. You will find SDN enabled gateways and you will also see them in access points with the necessary intelligence and policy management functionality.