SD-WAN deployment has many approaches. This article explains several common SD-WAN architectures. It highlights their features and suitable scenarios. The goal is to help companies choose the best solution based on their business needs, network environment, and budget.

1. Overlay Networking

Overlay Networking builds a logical network layer on top of the existing physical infrastructure. It allows data to travel over multiple paths. Companies do not need to modify their underlying network. A centralized controller manages the entire network. Configuration and monitoring become simpler. The system also enforces unified security policies.

2. On-Premises SD-WAN Architecture

On-Premises SD-WAN Architecture is a straightforward solution. Each office location is equipped with an SD-WAN Edge device. This setup generally does not require an additional SD-WAN gateway. Offices connect via point-to-point or mesh topologies. This model suits companies that prefer internal SaaS over cloud-hosted services. It helps reduce costs and simplifies maintenance.

3. Cloud SD-WAN Architecture

Cloud SD-WAN Architecture connects SD-WAN Edge devices to a cloud-based SD-WAN gateway. This approach enables real-time traffic management. The system supports multi-circuit load balancing and failover mechanisms. It also ensures smooth access to cloud applications. Cloud gateways are hosted by providers such as Office 365, Salesforce, and Dropbox. Companies can run critical real-time cloud applications over a dedicated MPLS channel while sending other traffic over the public Internet. This strategy helps reduce overall expenses.

4. Cloud Backbone Architecture

Cloud Backbone Architecture requires SD-WAN Edge devices to connect to the nearest network POP. In this configuration, traffic shifts to an MPLS network. Companies gain dedicated line-level SLA guarantees. Most MPLS channels connect directly to major cloud service providers. This improves application performance and reliability. For companies concerned about broadband quality, this solution is very attractive. Non-critical applications are moved to low-cost broadband, while critical services receive more bandwidth. This improves overall network performance.

5. Hybrid WAN

Hybrid WAN combines SD-WAN with MPLS VPN lines. This solution supports a flexible mix of MPLS, Internet, LTE, and 5G links. Companies can achieve multi-link connectivity based on their needs. Hybrid WAN finds a balance between cost, reliability, and performance. It is suitable for handling various types of application traffic. This model meets diverse business requirements.

Each SD-WAN deployment architecture offers unique advantages and fits different scenarios. Enterprises should evaluate their specific business demands, network conditions, and budget constraints when choosing a solution. They must also consider the security, management, and performance aspects of each option. For further technical support, companies are encouraged to consult SD-WAN service provider like Ogcloud.