🏆The Challenges of Deploying SD-WAN 🪭
Understanding the Potential Challenges in Deploying SD-WAN
As businesses move towards more flexible, scalable, and secure networking solutions, Software Defined Wide Area Networks (SD-WAN) are becoming the go-to choice for optimizing network performance. SD-WAN offers many solutions to the limitations of legacy WAN architectures, but despite its benefits, deploying SD-WAN comes with its own set of challenges. From setup and integration to ongoing management and security, understanding these potential pitfalls is crucial for a successful deployment.
Deployment Challenges
Even with automation, SD-WAN deployment can face compatibility issues with legacy infrastructure. Older hardware may not support all SD-WAN features, necessitating upgrades or additional configurations. These issues are exacerbated in environments with products from multiple vendors.
Mitigating compatibility problems requires a thorough assessment of existing infrastructure before deployment. Businesses should work closely with SD-WAN vendors to ensure seamless integration. Without this preparation, SD-WAN implementation can result in increased costs and deployment delays.
Configuration Complexity
The first major challenge businesses encounter with SD-WAN is the complexity of its setup. Integrating multiple network paths, securing edge devices at various branch locations, implementing security services, and defining routing policies can make the initial configuration daunting. Misconfigurations, especially by novice network administrators, can lead to poor performance, security vulnerabilities, or a lack of scalability.
A common issue is choosing an SD-WAN vendor that doesn’t align with your specific business needs, such as lacking adequate security features or failing to support critical applications. To simplify this, many SD-WAN solutions provide provisioning templates for automated setup. Automation reduces manual errors and complexity, but thorough training, granular policy definition, and a phased deployment approach (starting with a pilot) are key to avoiding misconfigurations.
Ease of Management
SD-WAN promises centralised management, offering a single pane of glass for automation and remote configuration. However, ongoing tasks such as performance monitoring, troubleshooting, and security patching remain necessary. Balancing manual oversight and automation is critical to maintaining control without increasing complexity.
Leveraging AI and machine learning (ML) capabilities within SD-WAN solutions can help alleviate management burdens. AI-driven analytics can proactively detect performance issues or security threats before they impact the network, allowing administrators to focus on high-priority tasks.
Underlay Network Latency & Jitter
SD-WAN overlays existing infrastructure, but if the underlay network suffers from latency, it directly impacts SD-WAN’s performance. High latency—caused by physical distance, congestion, or bandwidth limitations—can slow down applications and frustrate users.
Businesses should optimize their underlay networks by using low-latency transport options like MPLS or selecting an SD-WAN provider with its own backbone. Additionally, techniques like traffic shaping, content delivery networks (CDNs), and edge computing can help reduce latency issues.
Jitter, the variation in packet arrival times, is a major concern for real-time applications like VoIP or video conferencing. SD-WAN can mitigate jitter by dynamically selecting optimal paths based on real-time telemetry data, but problems like network congestion, routing instability, and hardware bottlenecks can still cause issues.
SD-WAN’s built-in traffic steering and Quality of Service (QoS) mechanisms help prioritize real-time traffic, reducing jitter by rerouting communications around underperforming links.
Cost Effectiveness
While SD-WAN often reduces costs compared to legacy WANs, unexpected expenses can arise during deployment and ongoing management. Upgrading underlay networks, paying for advanced features, and ensuring redundancy can add to the total cost.
To avoid cost overruns, businesses should conduct a thorough cost-benefit analysis before selecting an SD-WAN vendor. Integrating SD-WAN with a broader SASE architecture can further optimize ROI by combining SD-WAN, security, and cloud access into one comprehensive solution.
Information Security Concerns
While SD-WAN offers local breakout points for cloud access, it also creates new security challenges by exposing more potential attack surfaces. The centralized management pane also becomes a single point of failure if compromised.
To mitigate these risks, businesses should adopt a reasonable security model and use multi-factor authentication, role-based access control, and regular security patching. A viable cybersecurity framework can further enhance SD-WAN security.
Scalability Issues
As businesses grow, their SD-WAN deployments must scale to meet increasing demands. Maintaining consistent policies across numerous devices and managing more endpoints can strain IT resources.
Vendors that offer Zero Touch Provisioning (ZTP), integrated cybersecurity, and performance monitoring can simplify scalability. Businesses should prioritize SD-WAN solutions that can grow with their network while maintaining security and performance.
Interoperability with Legacy Systems
Legacy systems, often incompatible with SD-WAN features, can create bottlenecks during integration. Inconsistent routing protocols, QoS configurations, and security policies between SD-WAN and older devices can complicate management and increase downtime.
A phased approach to integration, along with professional support from SD-WAN vendors, helps bridge these gaps. Protocol translation and overlays can facilitate interoperability, ensuring smoother transitions.
Quality of Service (QoS) Management
QoS management ensures critical applications receive priority over less important traffic. Misconfigurations, network failures, or underlay issues can affect QoS policies.
Continuous monitoring of QoS metrics like latency and jitter is essential for troubleshooting and maintaining SLAs. Setting up alerts for QoS violations can help businesses proactively address issues before they escalate.
Wrap
While SD-WAN offers numerous benefits over legacy WANs, businesses must be aware of the potential challenges during deployment and operation. By carefully planning, conducting assessments, and selecting the right vendor, companies can navigate these challenges effectively. Understanding the common issues associated with SD-WAN—from configuration complexity to latency concerns—ensures that businesses can fully leverage the advantages of SD-WAN, while minimizing risks and avoiding unnecessary costs.
Ronald Bartels ensures that Internet inhabiting things are connected reliably online at Nepean Networks - the leading specialized SD-WAN provider in South Africa. Learn more about the best SD-WAN provider in the world! 👉 Contact Nepean
