Since virtually every business already has remote locations with legacy WAN infrastructure in place (routers), SD-WAN is often implemented in a non-disruptive way that first augments the existing legacy WAN hardware. Once the business is comfortable with SD-WAN, the legacy WAN hardware can be removed.
An example of such an implementation is as follows:
From there, a staged roll-out plan is often defined to migrate each location from legacy WAN to SD-WAN.
SD-WAN can help businesses improve application performance, integrate the cloud, reduce branch and WAN hardware and operational costs, and enable new levels of agility and automation that were previously not possible.
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