Getting started with SD-WAN

Getting started with SD-WAN

10 August 2020 | Salim Khouri, Director of Solutions Engineering, Expereo


Whether your goal is to optimize application performance or get real-time visibility over network traffic, enhanced cloud connectivity could be the answer, simplified by SD-WAN.

Q. How do you prepare a site for SD-WAN implementation?

Site readiness is critical for successful deployment. Like any Internet-based service, a site needs to receive both Internet access lines and the router to leverage an SD-WAN network. This can include physical requirements such adequate power, a place to rack and stack equipment, patch cords – all the way to ensuring network IP addresses and VLAN information needed for configuration is accurate.

Q. How do you judge the amount of bandwidth needed from carriers?

How much bandwidth that is needed, is typically a function on the existing size of the circuits used by a customer, and how much forecast in user growth is expected. The benefit is that commodity internet access is for the most part much cheaper than MPLS, so on a cost-by-cost comparison, most customers will benefit with much larger Internet circuits, that can carry their SD-WAN traffic, as well as enjoy more direct access to SaaS and cloud providers through local Internet breakout.

Q. Are there any rules of thumb to improve performance across SD-WAN?

Since SD-WAN is built on VPN technology, a good SD-WAN design accounts for all customer locations and the traffic path of user data. This information is vital as latency can significantly impact the user experience. Here’s our rule of thumb at Expereo: Good SD-WAN design is based on the applications being used, and where they are accessed from, optimizing a network for business-specific needs.

Q. What argument would you give for switching to SD-WAN?

You’ve got to consider what the main drivers behind SD-WAN are:

  1. Cost 
  2. The Cloud
  3. Flexible Deployment
  4. Application performance 
  5. Visibility

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