Software defined networking is a concept that still has a ways to go before it should be considered mature. Standards are evolving, vendor support is patchy but improving, and many administrators simply don't have enough impetus to really get the ball rolling on proper deployments.
For companies that have, or plan to have, extensive private cloud implementations, SDN provides a way to squeeze more usability and flexibility from existing network component infrastructure. Companies running public clouds, either from themselves or for paying customers to use for their own hosted infrastructure, already know this material and are well positioned to take a leadership role in pushing for standards to mature and manufacturers to support OpenFlow and other industry SDN efforts.
The SDN concept is still forming, but it will play an increasingly important role in networks around the globe in the next two to three years. Be ready.
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