Businesses are increasingly seeking robust and flexible solutions to enhance their network performance and security
With that in mind, Software-Defined Wide Area Networks (SD-WAN) have emerged as a key technology, offering significant advantages over traditional network approaches. In this article, we delve into the nuances of SD-WAN, drawing on insights from Gamma’s Managing Director – Direct, David Macfarlane, and Direct Network Support Manager, James Sirrett.
Understanding the Shift in Network Architecture
The conventional network architecture has been undergoing a significant transformation. Organisations now deploy multiple internet connections, including satellite and radio, to ensure redundancy and reliability. “Many enterprises now use one, two, or even three internet connections, with some utilising satellite or radio for backup,” says David Macfarlane. This trend is particularly evident in the rise of hybrid working environments, where secure, zero-trust network access is paramount.
James Sirrett elaborates, “We’re seeing a trend where laptops are becoming more like mobile devices, treating any network as zero trust. With tools like Microsoft Defender, Global Protect, and VPNs, these devices are secure endpoints, consuming centralised cloud services from any location.”
The role of SD-WAN in enhancing network security and performance
This technology is pivotal in simplifying secure and automatic connectivity for users, which is crucial given the increasing number of interconnected devices and the growing Internet of Things (IoT) landscape. “SD-WAN facilitates this breakout, allowing fast deployment and efficient use of cloud services like Office 365 and Google Suite,” David explains. This capability reduces core bandwidth consumption and latency, particularly important for organisations with large-scale deployments.
James adds, “In a typical network architecture, client devices connect securely to a cloud gateway service. Corporate networks are less about moving large amounts of data and more about securing devices that can’t always VPN.” This shift is vital for maintaining security and performance in a hybrid working environment.
Application-specific routing and traffic management
One of the standout features of SD-WAN is its ability to monitor and route traffic based on application needs, providing significant advantages in visibility and control. “SD-WAN appliances and routers prioritise voice traffic within a network, ensuring quality even over public internet connections,” James notes. This prioritisation is crucial for maintaining the performance of critical applications, especially in industries where stability is non-negotiable.
David highlights a practical example: “A recent case with a large customer highlighted this. They wanted to consume a big voice solution over internet and SD-WAN but found that traditional MPLS was still relied upon for voice due to its stability.” This scenario underscores the hybrid approach of SD-WAN, leveraging both MPLS and large internet pipes to ensure optimal performance.
Industry adoption and sector-specific applications
Different industries are adopting at varying rates, with some more hesitant than others. “Retail is a big adopter, leveraging SD-WAN for quick, scalable network deployments,” says David. Small retail branches, for example, use SD-WAN to handle card payments and other minimal bandwidth needs efficiently. On the other hand, public sector organisations often remain reliant on MPLS due to existing infrastructure and proximity considerations.
James provides additional context: “Public sector organisations, like local councils, still often rely on MPLS due to their proximity and existing fibre infrastructure.” This reliance on MPLS highlights the hybrid model where both technologies coexist, offering flexibility and reliability.
Supporting cloud environments and hybrid work models
As organisations increasingly adopt cloud-first strategies, SD-WAN plays a crucial role in supporting seamless connectivity to cloud platforms like Azure and AWS. “Vendors offer onramp solutions for IaaS in clouds, enabling connectivity to these platforms,” James explains. Gamma’s capability to deploy and manage these connections ensures that businesses can integrate cloud services effortlessly.
David emphasises the importance of this shift: “With many employees working remotely, organisations need to extend corporate controls into public clouds, enabling secure access to applications without routing all traffic through central data centres.” This approach supports a flexible and secure hybrid work model, essential in the modern digital workplace.
The future of MPLS in the SD-WAN era
Despite the advancements and benefits of SD-WAN, MPLS is far from obsolete. “Many customers adopt SD-WAN for its benefits but continue using MPLS where it makes sense,” David asserts. This hybrid deployment model leverages the strengths of both technologies, ensuring that businesses can meet their specific network requirements effectively.
James concurs, “SD-WAN offers great observability across all layers, showing application usage and allowing organisations to manage their networks more effectively.” This enhanced visibility and control are crucial for businesses looking to optimise their network performance and security.
So, where’s it all going?
SD-WAN is undeniably transforming the way organisations manage their networks, offering enhanced security, performance, and flexibility. As businesses continue to navigate the complexities of the modern digital landscape, the hybrid approach combining SD-WAN and MPLS provides a robust solution that addresses their diverse needs.
David Macfarlane sums it up succinctly: “SD-WAN supports cloud environments by providing seamless connectivity to platforms like Azure and AWS, enabling a flexible, cloud-first strategy.” This strategic approach ensures that businesses can leverage the best of both worlds, maintaining a competitive edge in an increasingly connected world.
James Sirrett’s parting words hammer home the potential of SD-WAN: “SD-WAN doesn’t care about the underlying transport mechanism as long as it carries IP packets. It continuously tests application performance and routes traffic accordingly, ensuring optimal performance.” This adaptability is what makes SD-WAN a game-changer in the realm of network management.