SD WAN (Software Defined Wide Area Network) lets you 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 companies according to certain conditions.

By way of example you may connect an MPLS network using one WAN connection and fasten to the Internet for the second WAN connection. With SD WAN the traffic would then dynamically route over either connection depending on policies you define.

Overview
To know how SD WAN works and the way it benefits your small business you should first know how things were configured previously.

Consider cold and hot taps while on an old fashioned wash hand basin. Think about the hot tap (WAN 1 Interface) is connected to the MPLS Network along with the cold tap (WAN 2 Interface) is attached to the Internet.

Once the hot tap and cold taps are operated separately it is not easy to control the temperature and flow from the water as they are totally outside of one another. Similarly, ahead of SD WAN it turned out challenging to mix, control and manage traffic (business applications) across separate independent WAN Interfaces (with this example MPLS and Internet) the same as the water in a old wash hand basin.

Exactly why is SD WAN better?
SD WAN is quite being a modern wash hand basin with the new and cold taps combined in a simple to adjust mixer tap. The temperature of the water could be controlled and will also be automatically regulated to offer an ideal temperature of water at all times.

With SD WAN you’ll have granular treating traffic across all WAN networks with advanced flexibility and agility. As an example, it is possible to define policies that frequently send traffic from a main business application on the MPLS network by way of example but automatically switch over online VPN when the MPLS network is congested or unavailable.

SD WAN transfers the duty of traffic management from physical devices to software and enables you to effectively and securely route traffic to remote locations for example branch offices. Centralised control gives full visibility over the network and enables ease of management.

To conclude SD WAN gives you complete control over how you dynamically route and prioritise traffic depending on application type along with other factors including congestion and availability.

How do SD WAN benefit your small business?
Lower bandwidth costs
Centralised network management
Full network visibility
Increased selections for vendor selection and connection type
SD-WAN benefits businesses by removing expensive routing hardware and instead provisioning connectivity and services from your cloud. With all the increased dependency on cloud-based services in the current workplace SD WAN offers a considerably more robust and reliable network.

SD WAN is a a lot more flexible option allowing a company to scale connectivity up and down for their business dictates and may automatically adjust and steer cloud-based traffic over different routes when congestion or company failure occurs. This allows a small business to run an infinitely more efficient and cost-effective enterprise reducing bandwidth costs when needed without compromising availability. Companies are effectively avoiding over provisioning which lowers overall WAN costs.

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

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

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