Improving existing VPN through Software Defined Networking

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Currently, telecom service providers are using Multi-Protocol Label Switching (MPLS) technology in their IP core network to provide Virtual Private Network (VPN) services to their customers. However, most of the current IP core network of service providers’ network does not have dynamic centralize configuration, provisioning and management mechanism, and also the network is not scalable enough. These limitations are caused by the vertical integration of data and control plane on networking device. In addition, the IP core layers of a service provider networks have redundancy on their network architecture (e.g. ethiotelecom IP core layer has five layers), which causes delay in configuration, provisioning and management. Hence, this thesis work shows how SDN based VPN is better than the existing VPN of a service provider network by comparing two networks performance parameters namely throughput and latency. Therefore, the simulation environment is setup using Linux routers for existing network; and openvswitches for the Software Defined Network (SDN) network. Finally, the simulation results for both networks have been presented on the result and discussion section. Based on the results found, the SDN- VPN throughput is 22.2222% higher than the existing VPN, and also its latency is 70.4675% lower than the existing VPN one



SDN VPN, Throughput, Latency