re: Why Campus Networks Need Software Defined Networking
Though I am a neophyte myself on SDN, I can appreciate the power of Software Defined whatever, having a familiarity with it in other contexts. As a practitioner of reliable, high-performance networking, a definitely feel some inner stress about SDN. Yes, technology needs to evolve, but at the same time the network can be so critical that you also just want it to work, and old-school simple is good for that (until you bump up against limits of old-school simple).
From what I can tell, the notion of SDN means different things to different people as well, so it will be interesting to see if one model/definition absolutely emerges that still allows for all of the wonderful things that an open framework can spawn. I know comparisons get made to server virtualization and even enterprise wireless systems that separate the data and control planes, but these can also have their own issues. I don't think SDN will equal a free lunch from problems, but the innovation it will afford will be amazing- as long as we make sure my innovation stays compatible with yours where they interconnect. This is an area where a lot of us will wait and watch while others triumph and get burned until it feels safer to jump in.
One man's O-pinion, brother. But a good piece on the topic.