Advancing Multiprotocol Label Switching Traffic Engineering with Segment Routing in Software Defined Network environment

Multiprotocol Label Switching Traffic-Engineering (MPLS TE) is a mechanism for optimizing network performances by using existing routing and resource reservation protocols in order to calculate and establish tunnels used for transporting different traffic flows depending on their destination. Aim of this paper is presenting benefits of using Segment Routing Traffic Engineering (SR-TE) in Software Defined Network (SDN) environment in order to overcome several MPLS TE problems and challenges presented in this paper. In order to present benefits of SR-TE in SDN, two scenarios are compared. In the first scenario SR is implemented in classical IP/MPLS network. In the second scenario, SDN controller is added to a topology and control over paths is delegated to SDN controller.