Optimizing SD-WAN for Enterprise: An Analysis of 4 Top Strategies

Software-defined wide area network (SD-WAN) technology is widely recognized as the catalyst for the transformation of enterprise networks. This is just another component in the ongoing software revolution in networking, which is specifically influenced by cloud computing.

Long ago, wide area networks (WANs) depended on multiprotocol label switching (MPLS) to connect several sites to a central data center. Nevertheless, despite optimization efforts, WAN solutions were always excessively tailored to meet the specific traffic demands and setups of organizations. Naturally, the deployment and maintenance of WANs were both time-consuming and costly.

Then SD-WAN emerged, particularly when networks expanded to support a greater number of apps. SD-WAN leverages software for the control plane to effectively enhance the management and optimization of transport links, independent of any constraints imposed by the underlying hardware. In essence, SD-WAN addressed the challenges encountered by data centers that rely on conventional WANs for connection.

The implementation of SD-WAN in data centers is still ongoing, and there may be a period of adjustment and learning. Adopting strategies to enhance the implementation and performance of an SD-WAN can enable you to effectively utilize the technology for achieving desired outcomes.

In this blog, we will address the subsequent topics:

• Comprehending the concept of SD-WAN.
• Several recommended strategies to maximize its performance.
• Exploring the future of SD-WAN.

Concept of SD-WAN

An essential factor contributing to the efficiency of SD-WAN is the software’s ability to abstract from the associated hardware. Hardware does not determine the capabilities of software, so it is not inherently linked to the physical components (devices) of the network

Given that software operates on the control plane and is independent of the hardware, it is effectively detached from the equipment, thereby providing greater degree of freedom. The control plane encompasses configuration, routing, and switching operations. Conversely, the data plane covers the physical transfer of data.

The control plane layer establishes communication with the data plane and strategically determines solutions to enhance network performance. There exists a universally accepted protocol for facilitate this communication. An open protocol now in widespread use is OpenFlow.

Furthermore, an application programming interface (API) enables the exchange of information between the control plane and the application layer. This communication essentially configures the control plane to optimize the hardware use in terms of efficiency and cost-effectiveness. Furthermore, it enables a wider range of applications to utilize current equipment without the need for complex configuration, which was not the case in the past.

An additional crucial component of SD-WAN is the security overlay:-

This layer operates autonomously from the data plane. The software employs conventional encryption techniques to verify and grant authorization to devices at the data plane. Such enables the control plane to enforce security policies throughout the data plane. Furthermore, it not only enhances the efficiency of packet delivery but also places security as a top priority. 

The division of the control plane, which governs the software that operates various components, enables the deployment of a wider array of services and applications.

Higher in the hierarchy are the management and network monitoring functions located above the control plane. This guarantees the ultimate optimization of both the overall network performance and security.

The extensive utilization of cloud technology, the integration of artificial intelligence and machine learning into applications, and the increasing prevalence of remote work have resulted in the substantial acceptance of SD-WAN services.

Although SD-WAN offers some advantages in terms of overall performance enhancements, it does not necessarily signify the demise of MPLS. Standardized Wide Area Networking (SD-WAN) can enhance conventional WAN technology and may exist together in specific situations.

MPLS remains effectively suitable for some high-performance or real-time applications. Indeed, MPLS can incur significant expenses for long-distance connections, therefore becoming SD-WAN a far superior choice.

The choice to transition to SD-WAN remains contingent upon the unique requirements of your network. To address the typical issues and constraints associated with MPLS, particularly in networks that are distributed over many geographical areas, it is advisable to consider investing in SD-WAN.

Four Optimal Strategies for Enhancing SD-WAN Deployment

SD-WAN holds significant promise for organizations operating extensive networks. Nevertheless, embracing and effectively utilizing technology may require a significant investment of time and acquisition of knowledge. Optimizing SD-WAN deployment inside your organization can be achieved through the following methods:

• Examine Current Technical Infrastructure

Implementing any recently developed technological solution for your network can encounter challenges. However, it is advisable to make every effort to minimize their occurrence. One issue you may have is that of unaccounted or underperforming gadgets.

Prioritize the initial step of doing a comprehensive analysis of the current equipment present in both the central data center and any branch sites. It is imperative to have full transparency of the infrastructure for the SD-WAN solution being implemented. Just as important, your current equipment should be dependable.

The function of SD-WAN is to provide traffic management, however, this traffic is transmitted through the devices. If those are beyond the end of their service life, it may be more advisable to update them before using new network protocols.

• Instruction and training of personnel

The deployment of SD-WAN is possible regardless of whether one has an on-premise infrastructure or depends on cloud services. Nevertheless, it is a supplementary component to the current infrastructure. Furthermore, its inclusion can potentially increase complexity for stakeholders who are accustomed to following traditional methods.

Despite the potential reduction of operational responsibilities for administrators or engineers, SD-WAN still requires significant human participation. Thus, it is crucial to provide comprehensive training and education to the stakeholders in order to properly exploit this technology.

• Systematic Evaluation

Conducting testing on the SD-WAN solution is recommended even after its deployment to effect any necessary adjustments that are in line with the performance or business-specific objectives. Such is particularly vital for data centers that are constantly growing.

• Enhance Security Measures

The majority of SD-WAN implementations provide encryption and a certain degree of firewalling. Nevertheless, it is advisable to contemplate allocating resources towards sophisticated security measures for crucial processes, such as state-of-the-art firewall infrastructure. Regarding on-premise infrastructure, these can be implemented directly on the premises.