If you choose to deploy controllers on-premises then you are responsible for both the control plane and data plane and will have full control over your network. Both deployment methods have their own advantages. Most of the SD-WAN vendors support two modes of controller deployments: on-premises and cloud hosted. These controllers can be deployed in multiple locations for geographical redundancy. Most of the SD-WAN vendors in the industry have a control plane and a data plane separation. One of the key advantage of SD-WAN technology in general is the separation of control plane and data plane. This needs to be decided before you can proceed to technical requirements. However, if you have risk-taking appetite, then you should explore new vendors too.Īs you shortlist your vendors, you need to make a couple of key decisions that will be important for your SD-WAN proof of concept: Placement of SD-WAN controllers and the edge routers. That means less risk of network downtime, which is critical since network availability is an important factor for running the business smoothly. Vendors with successful customer deployments have their product and their code baked in, which means that there's less chance of encountering a bug that's not known to the vendor. So how do you differentiate between the “good” and the “best”? First, do some research to narrow down the list of SD-WAN vendors, and look for ones that have many customers with sizable deployments. It's practically impossible to talk to each vendor, learn about their offerings, and test their products in your network. SD-WAN is a hot space and as a result, it’s saturated with vendors. As a network manager or an architect, you have to pick the best technology that’s affordable and meets your business requirements and design goals. After all, SD-WAN is a technology play in addition to cost savings. You have to convert your motivation into technical requirements. Once you have made a good business case for SD-WAN, then you are ready to take the leap forward.
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