More than a year ago, I explained why end-to-end flow-based forwarding doesn’t scale (and Doug Gourlay did the same using way more colorful language) and what the real-life limitations are. Not surprisingly, the gurus that started the whole OpenFlow movement came to the same conclusions and presented them at the HotSDN conference in August 2012 ... but even that hasn’t stopped some people from evangelizing the second coming.
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