At the root of John Boyd’s “OODA loop” methodology, there is the notion that we need to acknowledge and work with levels of “uncertainty”—gaps that result when applying established models to new and changing contexts[i]. Unfortunately, the networking community—desperate for operational stability—largely ignores these mismatches, designing network and security architectures as if they can dictate how applications are deployed.
The time of SDN/NFV hype is past. Sure, you will still come across exaggerated claims that the cure to all your networking challenges is just a click away but the nature of the conversation has fundamentally changed. It's now grounded in fact; no longer does it reside in that other virtual world - namely PowerPoint. It's now a regular occurrence to hear of a service provider publishing news of a virtualisation strategy or an agreement to embark on a trial.