SD WAN (Software Defined Wide Area Network) allows you to connect multiple agencies to multiple interfaces with an SD WAN capable firewall. The SD WAN firewall is application aware and automatically steers traffic over different agencies determined by certain conditions.

For instance you may connect an MPLS network on one WAN connection and correct to the net for the second WAN connection. With SD WAN the traffic would then dynamically route over either connection according to policies you define.

Overview
To be aware of how SD WAN works and the way it benefits your business it is important to first understand how things were configured previously.

Consider cold and warm taps while on an old-fashioned wash hand basin. Suppose the hot tap (WAN 1 Interface) is coupled to the MPLS Network along with the cold tap (WAN 2 Interface) is coupled to the Internet.

In the event the hot tap and cold taps are operated separately it is difficult to manage the temperature and flow in the water since they are totally separate from each other. Similarly, just before SD WAN it turned out difficult to mix, control and manage traffic (business applications) across separate independent WAN Interfaces (with this example MPLS and Internet) the same as the water within an old wash hand basin.

Why’s SD WAN better?
SD WAN is a bit being a modern wash hand basin with the recent and cold taps combined in an easy to adjust mixer tap. The temperature of the water may be controlled and can even be automatically regulated to provide you with the right water temperature all the time.

With SD WAN you can have granular treating traffic across all WAN networks with advanced flexibility and agility. As an example, it is possible to define policies have a tendency to send traffic from your main business application within the MPLS network as an example but automatically change online VPN when the MPLS network is congested or unavailable.

SD WAN transfers the responsibility of traffic management from physical devices to software and allows you to effectively and securely route people to remote locations including branch offices. Centralised control gives full visibility throughout the network and enables simple management.

To sum up SD WAN offers you complete treating the method that you dynamically route and prioritise traffic determined by application type and other factors such as congestion and availability.

How do SD WAN benefit your company?
Lower bandwidth costs
Centralised network management
Full network visibility
Increased choices for vendor selection and connection type
SD-WAN benefits businesses by removing expensive routing hardware and instead provisioning connectivity and services through the cloud. With the increased reliance upon cloud-based services nowadays in this workplace SD WAN provides a much more robust and reliable network.

SD WAN can be a considerably more flexible option that allows a company to scale connectivity along for their business dictates and can automatically adjust and steer cloud-based traffic over different routes when congestion or supplier failure occurs. This gives a small business to run a lot more efficient and cost-effective enterprise reducing bandwidth costs as required without compromising availability. Corporations are effectively avoiding over provisioning which lowers overall WAN costs.

The centralised control enables changes being implemented and quickly pushed to network hardware such as routers and switches.

After a primary investment SD-WAN can improve a business’s connectivity between branch locations, the key office, data centres and the cloud while reducing running costs making lasting savings as time passes.

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