While the early success of SDN was in local area networks (and particularly the special case of datacenter networks) it didn’t take too long before it made its impact in the wide area. The WAN applications of SDN can be further subdivided: there was the application of SDN to traffic engineering of inter-datacenter networks and then there is what came to be known as SD-WAN.
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How SDN Came to the Wide Area
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While the early success of SDN was in local area networks (and particularly the special case of datacenter networks) it didn’t take too long before it made its impact in the wide area. The WAN applications of SDN can be further subdivided: there was the application of SDN to traffic engineering of inter-datacenter networks and then there is what came to be known as SD-WAN.