How Does SDWAN Work?
SDWAN works by connecting users on the network to one another via multiple Internet-based services (such as broadband or 4G). Instead of requiring a physical connection à la MPLS (more on that later), SDWAN utilises a bundle of Internet connections. It then intelligently chooses the optimal one at any given time to route traffic.
For example, your SDWAN may be a selection of various connections including a 4G network, NBN, fibre, and an ADSL connection. These can be provided by any combination of ISPs such as Telstra, Optus, or TPG. When you want to send data across the network to another location, the SDWAN identifies which connection currently provides the most efficient speeds and will route traffic that way. If that connection becomes overloaded or is otherwise unavailable, it will move to the next best connection available. This traffic shaping reduces network congestion.
This is why it’s also advised to use multiple ISPs in your bundle. If one carrier is down, e.g. Telstra is having an outage, then you still have other options on your Optus or TPG connections.
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