SDWAN (Software Defined Wide Area Networks)

Vendors, and Usage, WHY, HOW: Knowledge of Software-Defined Wide Area Network (SDWAN) technology, its benefits, how it works, and leading vendors like Cisco, VMware, Fortinet, and others.

Software-Defined Wide Area Network (SDWAN) technology revolutionizes network management and optimization by using software-based approaches to control connectivity, management, and services between data centers, remote branches, and cloud instances. Here’s an overview of SDWAN, its benefits, how it works, and key vendors.

What is SDWAN?

SDWAN is a virtual WAN architecture that allows enterprises to leverage any combination of transport services—including MPLS, LTE, and broadband internet services—to securely connect users to applications. It uses a centralized control function to direct traffic across the WAN in an intelligent and secure manner.

Benefits of SDWAN

• Cost Savings: Reduces reliance on expensive MPLS circuits by leveraging cheaper broadband internet connections.
• Enhanced Performance: Improves application performance and user experience by dynamically routing traffic based on real-time conditions.
• Simplified Management: Centralized control simplifies network management and provisioning.
• Security: Integrated security features protect data across all connections.
• Flexibility and Scalability: Easily scales to accommodate new branches and remote sites.

How SDWAN Works

1. Centralized Control: SDWAN uses a centralized controller to manage network traffic, policies, and configurations.
2. Dynamic Path Selection: It continuously monitors the performance of WAN links and dynamically routes traffic over the best available path.
3. Policy-Based Management: Administrators can set policies that prioritize traffic based on application type, ensuring critical applications receive the necessary bandwidth.
4. Security Integration: SDWAN solutions often include built-in security features such as encryption, firewalling, and secure web gateways.

Leading SDWAN Vendors

Several leading vendors offer SDWAN solutions, each with unique features and strengths:

1. Cisco
   • Product: Cisco SD-WAN (Viptela)
   • Features: Extensive security features, integration with Cisco’s broad portfolio of networking solutions, robust analytics and reporting.
2. VMware
   • Product: VMware SD-WAN by VeloCloud
   • Features: Cloud-first approach, strong integration with VMware’s ecosystem, ease of deployment, and centralized management.
3. Fortinet
   • Product: Fortinet Secure SD-WAN
   • Features: High-performance security, deep integration with Fortinet’s security fabric, and unified threat management.
4. Silver Peak (now part of HPE Aruba)
   • Product: Unity EdgeConnect
   • Features: Advanced WAN optimization, centralized orchestration, and strong security features.
5. Palo Alto Networks
   • Product: Prisma SD-WAN (formerly CloudGenix)
   • Features: AI-driven operations, application-defined fabric, and seamless integration with Palo Alto’s security offerings.
6. Citrix
   • Product: Citrix SD-WAN
   • Features: Comprehensive application visibility and control, integration with Citrix’s workspace solutions, and robust security features.

Why Use SDWAN?

• Cost Efficiency: SDWAN reduces costs by using affordable broadband connections instead of solely relying on MPLS.
• Performance Optimization: Ensures optimal application performance through intelligent routing and traffic management.
• Simplified Operations: Centralized management and zero-touch provisioning streamline network operations.
• Improved Security: Provides end-to-end encryption, secure traffic segmentation, and integrated security services.
• Agility and Flexibility: Quickly adapts to changing business needs and supports rapid deployment of new branches or locations.

How to Implement SDWAN

1. Assessment: Evaluate current network infrastructure and define requirements based on business needs.
2. Vendor Selection: Choose an SDWAN vendor that aligns with your requirements and offers the desired features.
3. Planning: Develop a deployment plan that includes network design, policy configuration, and integration with existing systems.
4. Deployment: Implement the SDWAN solution, starting with pilot sites to test and refine configurations.
5. Management and Optimization: Continuously monitor and manage the SDWAN deployment, adjusting policies and configurations as needed to ensure optimal performance and security.

SDWAN technology offers a robust, flexible, and cost-effective way to manage and optimize enterprise-wide connectivity, making it an essential component of modern networking strategies.