Recognizing the Significance of SD-WAN

Recognizing the Significance of SD-WAN

Enterprise Networking Mag | Monday, January 17, 2022

More than just cloud technologies are reshaping enterprise networking. By combining the public Internet with private networks built by SD-WAN providers, SD-WAN eliminates the need to deal with connectivity issues.

FREMONT, CA: As organizations continue to implement and understand cost savings and operational efficiencies, they have begun to adopt virtualization rapidly. To comprehend why businesses are adopting SD-WAN, it's necessary to discuss the issues confronting businesses and their IT departments. To understand why enterprises, embrace SD-WAN, it's necessary to discuss the issues plaguing IT teams and how SD-WAN addresses these networking challenges.

Concerns about hybrid networking: Enterprises can choose from various transport methods, including multiprotocol label switching (MPLS), long-term evolution (LTE), and the Internet. The WAN would utilize all available routes in an ideal world and dynamically select the optimal path for users and applications to achieve the highest possible service level agreement (SLA).

Businesses previously relied exclusively on MPLS, but now, MPLS is frequently used as a backup even when another mode of transport is introduced. Combining traditional WAN technology with routing protocols can be extremely difficult.

On the other hand, SD-WAN is capable of utilizing a variety of transport mechanisms. For example, most SD-WAN solutions are transport agnostic and can operate over MPLS, 3G, 4G, 5G, LTE, or wireless Internet. All of these routes are active-active, which means that if a node fails or slows down, it is automatically replaced by another node in the network. The system will choose the optimal route dynamically based on the network policies defined by administrators.

Costs of bandwidth have been inflated: Organizations must ensure that critical software and applications, whether customer-facing or internal employee productivity systems, are always available and operational.

On the other hand, businesses are constantly deploying distributed architectures and business frameworks to stay connected to their clients and partners. Additionally, they expect their application to be as efficient and reliable at the most remote branch location, which is connected via a WAN, as it is at the company headquarters or data center.

Historically, businesses have acquired and controlled private networks to achieve LAN-like efficiency. Multiple dedicated private networks, one for each application, are frequently introduced.

On the other hand, these private networks are expensive. This expense impairs the enterprise's ability to support more complex, real-time applications such as voice over internet protocol (VoIP), video conferencing, and virtual desktops.

SD-WAN converts a business's inactive backup paths into active forwarding paths that utilize all of a site's available bandwidth. Email, for example, is not typically a time-sensitive application, and the application's bandwidth usage may fluctuate. As a result, an email application would deliver the service without relying on a low-latency, high-quality route. Rather than that, in SD-WAN, this traffic will be detected and routed via the least expensive path possible. On the other hand, VoIP and video conferencing systems require low latency and high-quality direction to adhere to the application's service level agreements (SLAs). The system will route traffic according to the application's requirements in SD-WAN.

Addressing security concerns: With more applications accessible via cloud and Software-as-a-Service providers in addition to traditional data centers, an organization's security perimeter is no longer limited to the demilitarized zone of the data center.

Recent security incidents have demonstrated that vulnerabilities are increasingly concentrated on the wide-area network (WAN). In reality, the entire WAN's surface area is constantly expanding and changing. Due to the static nature of traditional networking and virtual private networks (VPNs), they are insecure, difficult to maintain, and slow to deploy.

However, this is not the case with SD-WAN. Since policies are transmitted from a central controller to the entire WAN Edge via an application program interface (API), security services such as encryption and application firewalling can easily be applied to the entire WAN Edge.

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