Software Defined Networking

Software-Defined Networking enables engineers, network and cloud operators to adopt a quick response to dynamic needs through a centralized control console. SDN is responsible for various latest technologies support for increasing the agility and flexibility of a network for supporting virtual servers and big infrastructures of data storage.

SDN is basically an approach. It designs and manages a network in such a way that control plane and forwarding plane which are just like brain and muscles respectively are separated. It makes the control of SDN even more programmable and SDN applications like cloud computing or mobile networks are abstracted.

SDN and SD-WAN

SDN has an extension called SD-WAN (Software-defined wide-area network). When any connection have to cover wider geographical area, SD-WAN is applied which is very helpful for the big companies. They can provide their connections to far off places widely. For example the networks of branch offices and big data centers have SD-WAN connection between them.

Nowadays, the companies are more inclined to choose SD-WAN due to its mind blowing capabilities and connecting abilities. The end-to-end encryption is also is another advantage of using SD-WAN in your company which simply means more secure networks.

Working of Software Defined Networking?

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SDN Framework

Source=SDX

The architecture of Software Defined Networking is very competing in terms of centralized control which separates the control logic from computing resources. Software Defined Networking, wherever used, has some basic functional components like SDN Controller, southbound APIs and northbound APIs:

  • SDN Controllers:SDN controller is referred as the brain of the whole network system. SDN Controller is responsible for providing an overall network view (centralized). It also allows a deep check of routers and switches to network admins and handle the network traffic with forwarding plane.
  • Southbound APIs:The information to the switches and routers is relayed by SDN with the usage of Southbound APIs. For example OpenFlow, is a southbound API and a famous protocol of SDN.

                   OpenFlow is just a part of bigger picture and OpenFlow and SDN are not same thing.

  • Northbound APIs:The other component of Software-Defined Networking is the northbound API that is used for the communication between applications and business layer. The deployment of services and programmability become much easier by using Northbound APIs.

Get detailed knowledge about SDN by clicking this link below

https://www.logicfinder.net/wp-content/uploads/2018/06/course-2.pdf