SD-WAN is a radical new way to design and deploy a WAN. SD-WAN gives end users, network engineers and Service Providers the ability to adjust, optimise, automate and test their WAN connections through software controls. Edge and core devices automatically route traffic from the customer edge based on application availability over multiple links. Customer sites become more aware, to enhance the customer experience of Cloud. The main driver of SD-WAN is to lower WAN cost whilst still providing the functionality of an MPLS configured network.