I'm completely new to NAC solution. We have an urgent requirement coming up from a customer for NAC implementation. It's an Enterprise network consists of DC, scaled down DR, Head office and various Remote offices. They have already purchased NAC manager and single NAC appliance. They want to implement this with minimum changes in the network.
Please suggest some starting points as how to integrate this NAC solution into existing network without disrupting any services. Any help would be greatly appreciated. Thanks in advance.