SD-WAN vs MPLS: Key Differences Explained

When comparing SD-WAN and MPLS, it's important to understand their differences in order to grasp how modern networking works.

SD-WAN provides a flexible and cost-effective approach by utilizing various transport technologies, enhancing performance and redundancy. In contrast, MPLS offers dedicated, reliable connections ideal for handling complex network requirements.

This article explores the key differences between SD-WAN and MPLS, helping students and learners understand which technology might be better suited for different networking scenarios.

What is MPLS?

MPLS (Multi-Protocol Label Switching) is a widely used networking technology that enhances the speed and efficiency of data transmission across networks.

Unlike traditional protocols that rely on source and destination addresses to route traffic, MPLS uses predetermined labels to direct data packets along established paths.

This method significantly reduces the complexity of routing decisions at each node, allowing for faster data forwarding.

What is SD-WAN?

SD-WAN (Software-Defined Wide Area Network) is a modern networking technology that enhances how organizations connect and manage their wide area networks.

Unlike traditional WANs, which rely heavily on hardware and fixed routing protocols, SD-WAN uses software-defined networking principles to create a virtualized overlay that abstracts the underlying network infrastructure.

Difference Between SD-WAN and MPLS

The table below compares SD-WAN and MPLS on various parameters:

Advantages of  SD-WAN Over MPLS

1. 1. Cost Efficiency: SD-WAN reduces costs by using existing internet connections instead of expensive dedicated lines required by MPLS.


2. 2. Flexibility and Scalability: SD-WAN allows for easy scaling and adaptation to changing needs, unlike the rigid structure of MPLS.


3. 3. Improved Performance: SD-WAN optimizes traffic routing based on real-time conditions, enhancing application performance compared to MPLS’s fixed paths.


4. 4. Enhanced Visibility and Control: SD-WAN provides better insights into network performance, enabling quicker issue resolution than MPLS.


5. 5. Direct Cloud Access: SD-WAN enables direct access to cloud applications, reducing latency and improving user experience compared to MPLS backhauling.

Advantages of MPLS Over SD-WAN

1. 1. Security: MPLS provides a private network that is inherently secure, offering better protection for sensitive data compared to SD-WAN's reliance on public internet connections.


2. 2. Performance for Real-Time Applications: MPLS typically delivers superior performance for real-time applications like voice and video, maintaining quality through dedicated bandwidth and prioritization.


3. 3. Guaranteed Service Levels: MPLS offers service level agreements (SLAs) that ensure consistent performance and reliability, which can be crucial for mission-critical applications.


4. 4. Centralized Management: MPLS networks are managed by service providers, providing a level of expertise and support that can simplify operations for organizations.


5. 5. Predictable Latency: MPLS connections have more predictable latency due to their dedicated paths, making them suitable for applications requiring stable performance.

SD-WAN vs MPLS Which One is Better?

SD-WAN offers superior flexibility, cost-efficiency, and scalability, making it ideal for businesses seeking to optimize network performance while managing expenses. 

On the other hand, MPLS provides guaranteed performance and security, making it suitable for mission-critical applications that require consistent bandwidth and low latency.

 A hybrid approach that combines both technologies can provide the best of both worlds—leveraging MPLS's reliability alongside SD-WAN's cost savings and flexibility.