An Introduction to SD-WAN

What is SD-WAN?

SD-WAN is the evolution of how WAN services are delivered, encompassing a greater range of features, simplified network management and cost savings due to optimizations in traffic routing.

Why should my business switch to SD-WAN?

  • Makes better use of your bandwidth without compromising on quality, saving you money.
  • Optimizes network management & provisioning, saving you time.
  • Adds application level security features, securing your network.


SD-WAN is an overlay network which transposes itself over top of your existing Internet and/or MPLS Networks. It differs from traditional routing technologies as it supports the simultaneous use of multiple different paths in order to optimize end-to-end communication.

How does it work?

SD-WAN deployments consist of a core controller that manages remote sites. Here is a breakdown of the interactions:

  1. Upon boot, the SD-WAN edge registers its outside IP address to the controller
  2. The controller dynamically learns the local routing prefixes available to each edge node
  3. The controller will then determine the optimal routing strategy for each edge node, if multiple links exist, it can route based on availability, response time, network congestion, application classes and other complex factors
  4. The controller sends the best prefixes together with transport network next hops to SD-WAN edge node

Should I implement SD-WAN?

If your business spans two or more remote sites requiring 100% uptime and complex quality of service for voice and sensitive business applications, then yes! This technology very much pushes the capabilities to make your life easier and to offer better uptime and responsiveness

Important Notes

While SD-WAN can be incredibly beneficial to your business, it’s important that your routing & security policies are specifically tailored to your business needs and designed in a way that will optimize your usage of the technology.

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