Your preferred vendors are saying that the only future is to buy more from them, but you struggle to pay for all their great products and integrate building blocks from diferent vendors?
Network-function virtualization (NFV) is a network architecture concept that proposes using the technologies of IT virtualization to virtualize entire classes of network node functions into building blocks that may be connected, or chained, to create communication services.
This definition might be meaningful for a technical person. However, it does not clarify why we need NFV. The below is a step by step guide of getting and tracking value from NFV investments.