The current, dominant architecture for enterprise Wi-Fi networks is to have a bunch of “thin” access points (APs) deployed for coverage with a number of controllers used as the “brains” of the deployment. The APs provide the connectivity to the devices and the controller acts as a central point of control for configuration, security and policy. This model is very common and has been in place now for about a decade.
However, the IT environment has changed and Wi-Fi architectures need to change along with it. The controller-AP model works in some scenarios, like deploying in large facilities with lots of people in them. But how many companies are like that now? My research shows that over 80% of employees now work outside the corporate headquarters, primarily in branch offices, and that’s where the main problems are for the current controller led model.