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Network Infrastructure Magazine | Sunday, January 02, 2022
A new tool is helping companies of all sizes enhance their IT networks. It's called a software-defined wide area network, transforming how organizations use their WANs.
FREMONT, CA: Software-Defined WAN has swept the enterprise and internet service provider (ISP) worlds in recent years. Once considered a pipe dream of IT, SD-WAN today enables the dynamic management and optimization of wide-area network (WAN) traffic with the same ease and precision as other cloud-based services.
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Virtualization of networks: SD-WAN performs the function of a network overlay. This enables the development of globally distributed apps that are completely transparent to the underlying network. The overlay is media-independent, providing a compelling alternative to existing wide area network (WAN) technologies for creating secure end-to-end connectivity between two or more widely scattered nodes.
When combined with intelligent automated path selection, SD-WANs may provide applications with high availability and performance. Additionally, it optimizes resource use and streamlines the network. Even when several service providers are involved, many links combine to establish a unified pool of resources, which is frequently referred to as a virtual WAN.
Creating an environment conducive to interoperability: SD-WAN enables the steady addition of assets when used in conjunction with existing systems and circuits. This is a significant benefit of the control plane's separation and independence from the data plane.
SD-WAN also accomplishes a major design aim by enabling the coexistence and interoperation of numerous circuits, routers, devices, and facilities. Additionally, APIs enable enterprises to effortlessly integrate new and existing management frameworks and monitor apps.
By establishing a secure overlay: SD-WAN provides a secure layer on top of all transport elements. Only SD-WAN devices that participate in the overlay are authenticated.
Any arrangement of circuit and service provider would provide secure and encrypted transport. Additionally, a dedicated control unit enables the automatic configuration and key management of a range of network components.
Utilization and performance monitoring: SD-WAN allows centralized control and visibility across a diverse variety of transport modes and service providers, as well as comprehensive control over remote locations that are connected. This functionality provides business-level visibility into device and network resource utilization.
Additionally, SD-WAN enables complete performance tracking for users. When output management is used in conjunction with business rules, it enables intelligent traffic routing through varied channels and services within the virtual WAN network.
Economical hardware: SD-WAN promotes cost-effectiveness and flexibility by utilizing widely available hardware and network equipment or servers. Due to the control plane's separation from the data plane, the data plane can utilize standard hardware.
Remotely delivered virtual applications can use existing or typical commercial off-the-shelf servers. The only disadvantage is that initial server installation and configuration require on-site IT support. This is likely to assist larger branches, campuses, and data centres.
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