SD-WAN vs. MPLS: Why Businesses Are Making the Switch

Digital transformation is about efficiency, agility, and innovation. AI, advanced analytics, and real-time integration are major elements of most digital transformation initiatives today, which is why so many organizations are modernizing their storage infrastructures.

Storage modernization and improved data accessibility are driving increased interest in software-defined wide area networking (SD-WAN), an innovative alternative to traditional multiprotocol label switching (MPLS) networks.

MPLS has long been the traditional enterprise networking solution, offering private, high-performance connections for voice, video, and business applications. But as businesses move to the cloud and seek greater flexibility, the high cost and limited scalability of MPLS have made technologies like SD-WAN an increasingly attractive option.

As enterprises continue to modernize their IT infrastructures with hybrid cloud, SaaS platforms, and edge computing, the choice between SD-WAN and MPLS has become increasingly important. In this article, we’ll explore how these technologies work, the pros and cons of each one, and how to choose the best option for your organization’s digital transformation journey.

What Is SD-WAN?

SD-WAN is a modern approach to enterprise networking that separates the network hardware from its control mechanisms. By virtualizing the network, SD-WAN enables businesses to manage multiple types of connections such as broadband, LTE, MPLS, and more, using centralized software.

In a nutshell, SD-WAN dynamically routes traffic over the best available path in real time, optimizing performance based on application needs, user demands, and network conditions. This leads to better efficiency, higher application performance, and lower overall costs compared to traditional networking solutions.

The benefits of SD-WAN include:

• Cost-effectiveness: SD-WAN leverages lower-cost broadband connections alongside costly dedicated circuits, choosing the most suitable path available to meet performance requirements.
• Flexibility: Software-defined WAN can easily integrate multiple connection types and is easily scalable, supporting the organization as its needs change.
• Simplified management: Centralized control makes SD-WAN easier to deploy, monitor, and manage.
• Cloud optimization: SD-WAN is well-suited for cloud-first architectures, ensuring seamless performance for SaaS and hybrid cloud applications.

Since SD-WAN enhances distributed access to cloud-hosted environments, choosing a modern storage solution like Pure Storage ensures that your organization’s data remains available, performant, and accessible, wherever and whenever it’s needed.

What Is MPLS?

MPLS is a time-tested approach to high-performance enterprise networking. Instead of routing packets based solely on destination addresses, MPLS assigns labels to data packets, directing them along predetermined, highly efficient paths across the network.

MPLS has been favored for years because of its ability to guarantee quality of service (QoS), ensuring critical applications like voice, video, and financial transactions have reliable, low-latency connectivity.

The primary benefits of MPLS are:

• Reliability: Dedicated circuits in an MPLS network deliver consistent performance with minimal downtime.
• Security: As a private network, MPLS offers highly robust protection without using the public internet.
• Quality of service (QoS): MPLS ensures that more sensitive traffic is prioritized over less important traffic and is delivered without disruption.

Key Differences between SD-WAN and MPLS

While both SD-WAN and MPLS connect users and applications efficiently, they differ significantly in their overall approach. Generally speaking, MPLS is viewed as a legacy approach to network infrastructure. It remains highly dependable, but it tends to be expensive and is far less agile than SD-WAN. 

Many businesses modernizing their IT stacks, including their storage solutions, are simultaneously moving toward SD-WAN to unlock greater flexibility and cloud readiness.

Benefits of SD-WAN over MPLS

Modern enterprises are leaning into SD-WAN for several compelling reasons:

• Agility: Businesses can spin up new locations or shift bandwidth allocation rapidly.
• Cloud readiness: SD-WAN enables direct access to cloud platforms without backhauling through centralized data centers.
• Cost savings: Reduced reliance on expensive MPLS circuits leads to significant savings.
• Resilience: If one connection fails, SD-WAN automatically reroutes traffic with minimal impact.

Because adopting SD-WAN often accompanies broader IT modernization, it’s essential to ensure your storage infrastructure is just as agile and cloud-optimized. Storage delivered as a service through Pure Storage^® Evergreen//One™ provides a flexible, future-proof solution that complements SD-WAN deployments perfectly.

Benefits of MPLS over SD-WAN

While SD-WAN offers modern flexibility, MPLS retains critical advantages in certain scenarios:

• Guaranteed performance: MPLS is ideal for applications demanding consistent low-latency performance, such as real-time financial trading.
• Built-in security: For organizations that have extraordinarily high security requirements, MPLS’s private circuits offer an extra layer of reassurance.
• Mission-critical environments: Sectors like banking, healthcare, and government sometimes prefer the reliable and predictable performance of MPLS networks.

In industries where compliance regulations are stringent or ultra-reliable network performance is essential, MPLS still has considerable value.

Choosing between SD-WAN and MPLS

When deciding between SD-WAN and MPLS, consider the following factors:

• Business size and growth plans: Fast-growing companies benefit from SD-WAN’s ability to rapidly scale and adapt to changing requirements.
• Cloud adoption: Organizations that make extensive use of SaaS applications or hybrid cloud platforms are likely to be better off with SD-WAN.
• Budget: If reducing networking costs is a priority, SD-WAN often provides a faster ROI.
• Application needs: Organizations requiring absolute performance guarantees for mission-critical applications are likely to favor MPLS.
• Security requirements: Highly regulated industries may prefer MPLS or hybrid models that combine SD-WAN with private links.

Ultimately, your network decision should align with your broader digital transformation goals, ensuring infrastructure agility, security, and cloud readiness.

Conclusion

Choosing between SD-WAN and MPLS isn’t a one-size-fits-all decision. SD-WAN offers flexibility, cost efficiency, and cloud-native performance ideal for agile enterprises, while MPLS remains the gold standard for guaranteed reliability and security in ultra-sensitive environments.

As businesses pursue modernization, they should rethink their approach to networking. At the same time, it makes sense to evaluate other aspects of the IT infrastructure stack, such as storage. Solutions like Pure Storage hybrid cloud offerings empower businesses to build a future-ready, high-performance foundation across their entire IT ecosystem.