The Legend of SDN: One Controller to Rule Them All

I originally posted this just over a year ago (Feb 5, 2013) on my corporate blog. I’m reposting here now because the subject of “master controllers” and federation is coming up again more insistently as users begin to think through how to implement a controller-based architecture. I expect to be writing more on this soon.

As we enter the second(ish) Year of SDN, we’ve gone from irrational exuberance to some semblance of reality, with some first-generation products starting to come to market now. That will inevitably drive more reality, on the user side, but an embrace of reality may take a bit longer on the vendor side. I say that because there are still plenty of “whoever wins the controller wars wins all” notions being promulgated in various forums. Continue reading

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