NFV — Today's network infrastructure is made up of several physical components (oftentimes, proprietary). In addition, the infrastructure is based on hardware that can quickly reach the end of its useful life, requiring a new design, integration and deployment. This phenomenon is compounded by the rising cost of energy, capital investment issues and lack of skilled personnel to design, integrate and operate increasingly complex network technologies. Worse still, hardware lifecycles are becoming shorter and shorter as innovation in technology and services accelerates within the information and communications technology (ICT) industry.
The concept behind NFV (Network Functions Virtualization) aims at solving these problems through the use of virtualization technology, which is used in IT, to combine several network functions on servers, switches and storage systems deployed in data centers, network nodes or with subscribers.
The NFV concept is used with SDN. Although these two concepts are mutually beneficial, they are independent from each other.
NFV offers many benefits, including:
- Lower equipment costs and energy consumption, by consolidating equipment and taking advantage of the IT industry's economies of scale;
- Faster commissioning times, by reducing the network operator's typical innovation cycle;
- Use of a single platform for several functions, applications and users;
- Services can quickly be adjusted according to needs;
- Existence of many ecosystems and freedom from vendor lock-in constraints.