Introduction to SDN and NFV
Before discussing the difference between the two terms, let’s understand them first briefly.
- SDN (Software-defined networking) is the concept that allows to programmatically control, change, and manage network behaviour dynamically via open interfaces and abstraction of lower layer functionality.
- NFV(Network functions virtualization) is the concept to use the technologies of IT virtualization to virtualize entire classes of network node functions into building blocks that may connect to create communication services.
The working of SDN and NFV is very close to each other with some of overlapping scope of each other’s functions.
Comparison Table: SDN vs NFV
Below table gives a clear comparison of both the terms –
| Category | SDN | NFV |
| Strategy | Separation of control and Data , centralization of control and programmability of network | Replacement of dedicated appliances and devices with generic servers. |
| Protocol | OpenFlow | Not presently |
| Benefits | 1.Simplification of – ·Configuration of entire network ·Operation of network since consolidation 2.Reduced cost due to no longer dependency on expensive vendor specific routers and switches. | 1.Speed up time to market 2.Simplification of procurement, design, integration and management of infrastructure since this all is standardized. 3.Increased scalability by dynamically allocating resources to network functions. |
| Supporters to initiative | Enterprise Software and Hardware Vendors | Telecom Service Providers |
| Formalization | Open Networking Forum (ONF) | ETSI NFV Working Group |
| Target Scope | Cloud, Data Center and Campus environment | Service Provider domain |
| Applicability | Works on Layer 2 and 3 of OSI Model | Works on Layer 4-7 of OSI Model |
| Application run | Industry standard servers / switches | Industry standard Servers |
 | ||
ABOUT THE AUTHOR
I am here to share my knowledge and experience in the field of networking with the goal being – “The more you share, the more you learn.”
I am a biotechnologist by qualification and a Network Enthusiast by interest. I developed interest in networking being in the company of a passionate Network Professional, my husband.
I am a strong believer of the fact that “learning is a constant process of discovering yourself.”
– Rashmi Bhardwaj (Author/Editor)
