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Companies use software-defined networking because it allows programmatic management, control, and network resource optimization.
FREMONT, CA: SDN is a network architectural model that enables programmatic management, control, and enhancement of network resources.
SDN separates network configuration and traffic engineering from the underlying hardware infrastructure, allowing for comprehensive and consistent network control through open APIs.
The limits of traditional network architecture
Conventional network architecture provides little flexibility for coordinating fixed-function network devices that have to be manually configured. Even one change can have a domino effect on network performance, potentially bringing the entire network down.
The conventional method towards network management is becoming outdated as data traffic volumes increase, network architecture becomes more complex, and demands to enhance network performance increase.
How software-defined networking works
The conventional network architecture model's static nature is inadequate to satisfy the demands of modern business IT. Companies need a network infrastructure that can scale and support dynamic computing environments depending on rapidly changing technology and business landscapes.
Decoupled architecture planes
The control plane and data plane are incorporated in conventional network architecture. Thus, every system change relies on configuring physical network devices, the protocols, and the software they support.
On the other hand, SDN decouples the Control Plane from the Data Plane and incorporates the network logically at the controller level. A controller located between the two Planes logically centralizes network intelligence, allowing users to select the programmable features they want to migrate from network devices to the application server or controller.
Consider programming ten routers one at a time and then monitoring how each device was configured and expected to behave. When it is scaled to numerous devices, the manual processes involved in device monitoring, configuration, and management become ineffective.
SDN algorithms do not limit the number of repeatable device configuration and management processes. An SDN would perceive multiple routers in the same way that it perceives ten routers. Algorithms can take into account the transforming dynamics of network configurations in scaled environments.
Openness and Interoperability
The main criteria for network traffic engineering is vendor interoperability and network integration, which extends from device planning and purchase to configuration and management.
The open network orchestration, service, and network management systems in an SDN system make deployment easier. As a result, the network infrastructure is simple to expand, and the entire system can avoid network performance and scalability inefficiencies.