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Software-defined networking in a wide area network (SD-WAN) allows intelligent control and management of networking, and efficient utilization of network resources through traffic engineering in real time for higher performance WANs. This paper proposes a fault-tolerant reactive routing system, called a smart routing system, for SD-WAN by investigating a variety of network features to be needed for monitoring in WAN in real time. The system keeps track of various network status data in real time to provide less packet loss and low network latency along with high availability and reliability in Software-defined WAN. We evaluate our system in real network provided by OpenLab at Juniper. Experimental results show that our approach successfully demonstrate resilience and efficiency by applying the programmability of SDN for WAN.
Golani et al. (Fri,) studied this question.