In recent years, large geographically distributed enterprises with a large number of regional branches (financial sector, retail, etc.) have begun to actively switch to SD-WAN technology to organize communication between their branches. According to IDC, in 2018, global sales of SD-WAN solutions increased by 64.9% to $ 1.37 billion, and by 2023 it is projected to increase to $ 5.25 billion with an average annual growth rate of 30.8%. Migration to a new technology is spurred by business digitalization and the transition to cloud applications. “First, traditional enterprise WANs are becoming less and less suited to the needs of today's digital business, especially when it comes to supporting SaaS applications or using hybrid or multi-clouds,” said Rohit Mehra, vice president of network infrastructure at IDC . "Secondly, enterprises are interested in easier management of multiple WAN connections to improve application performance and improve the end-user experience." Several vendors are among the leaders in the SD-WAN market, among which Cisco holds the largest volume - the company accounts for almost half of all shipments (46.4% in 2018).
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How it works
SD-WAN (Software Defined WAN) technology is based on applying the principles of Software Defined Networking (SDN) to distributed corporate networks. First of all, this is the separation of the control of the data transfer process (Control Plane) from the processing of the data transfer process (Data Plane) by transferring control functions (routers, switches, etc.) to an application running on a separate server (controller). SD-WAN allows you to centralize the management of a distributed infrastructure, since the operation of the entire network is provided by a controller located at the head office.