Before we dive into the SDN network, we should take a moment to prepare our network. For example, as we have seen with the various examples in the book, network automation works because it offloads redundant, boring tasks with computer programs (Python in our case). A computer can complete the tasks fast and without mistakes, and is superior to its human counterpart. What a computer program does not do well, amongst other things, is analytics and interpretation of situation. Automation is most effective when our network is standardized with similar functions. The same goes for SDN migration. If we have many parts of the network that are dissimilar that requires constant thinking when making modifications, simply placing a controller within the network will not help us much.

The following are what I deem to be necessary steps that should be taken prior to SDN and OpenFlow migration. The points listed next are subjective in nature with no right or wrong answer, but only a continuum scale that shows relative strength in each area. For the engineer in me, I understand that we are all anxious to get to practical examples. However, I believe the mindset and practice will serve you well on your journey for migration. They are worth the time to think through and incorporate into your strategy.