Why would any one want to change from legacy wide area networking to software defined wide area networking (SDWAN)? See the above infographic for more details about the technology. There needs to be a business reason for it and not a technical one. Techies, the type who don't create documentation, tend to solve problems bottom up. The technology is chosen first, then there is a retrofit of underlying processes to fit with that technology, and finally the business is coerced to wave the wand at the newly acquired widgets. This engagement model is the reason why so many projects around technology fail to deliver on the business value. Simply put the problem that is being solved is not one underpinning business.
Read the article over at LinkedIn here.