Advancing IP/IMPLS with Software Defined Network in Wide Area Network

New technologies introduce more services which will call for significant advances and changes in Multiprotocol Label Switching (MPLS) networks. Networks will have to go in the direction of network programmability, virtualization and cloud-based services. In this paper, we examined Software Defined Wide Area Network solution, its architecture and benefits of use. In order to analyze benefits of using SD-WAN two scenarios are compared: (i) Policy-based routing on WAN links in classical IP/MPLS network, and (ii) Using SDN controller to manage traffic on WAN links. Aim in both scenarios is to use the most optimal path for specific network.