There are three major categories of traffic that flow through a data center: traffic inside a data center, traffic flowing from data center to data center (known as data center interconnects or DCIs) and data center to user traffic. Traffic between data centers (DCI traffic) is growing faster than the other categories of traffic. This rapid growth is fueled by the increase in content distribution networks, the proliferation of cloud services and the need to move data between clouds and to the edge. There’s an ever-growing volume of data that must be replicated across different data centers which puts pressure on DCI networks to be flexible, resilient and adapt quickly to changing bandwidth demands. All this growth puts increasing pressure on DCIs and results in operational challenges.

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