SD WAN (Software Defined Wide Area Network) allows you to connect multiple service providers to multiple interfaces by using an SD WAN capable firewall. The SD WAN firewall is application aware and automatically steers traffic over different providers determined by certain conditions.
For instance you could possibly connect an MPLS network using one WAN connection and repair online about the second WAN connection. With SD WAN the traffic would then dynamically route over either connection based on policies you define.
Overview
To comprehend how SD WAN works and how it benefits your small business you should first appreciate how things were configured previously.
Consider hot taps by using an old-fashioned wash hand basin. Think about the hot tap (WAN 1 Interface) is attached to the MPLS Network and 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 regulate the temperature and flow from the water since they are totally independent of one another. Similarly, before SD WAN it had been difficult to mix, control and manage traffic (business applications) across separate independent WAN Interfaces (on this example MPLS and Internet) just like the water within an old wash hand basin.
Why is SD WAN better?
SD WAN is a little being a modern wash hand basin with the new and cold taps combined in an very easy to adjust mixer tap. The temperature of the water could be controlled and will be also automatically regulated to offer the perfect water temperature all the time.
With SD WAN you could have granular control of traffic across all WAN networks with advanced flexibility and agility. By way of example, it is possible to define policies that frequently send traffic from your main business application in the MPLS network as an example but automatically transition to the web VPN if your MPLS network is congested or unavailable.
SD WAN transfers the responsibility of traffic management from physical devices to software and lets you effectively and securely route people to remote locations such as branch offices. Centralised control gives full visibility through the network and enables ease of management.
In summary SD WAN gives you complete treatments for the method that you dynamically route and prioritise traffic depending on application type along with other factors such as congestion and availability.
How do SD WAN benefit your business?
Lower bandwidth costs
Centralised network management
Full network visibility
Increased options for vendor selection and connection type
SD-WAN benefits businesses by removing expensive routing hardware and instead provisioning connectivity and services from the cloud. Together with the increased dependency on cloud-based services nowadays in this workplace SD WAN delivers a considerably more robust and reliable network.
SD WAN is really a far more flexible option that enables a small business to scale connectivity up and down as his or her business dictates and may automatically adjust and steer cloud-based traffic over different routes when congestion or service provider failure occurs. This permits a business to own an infinitely more efficient and cost-effective enterprise reducing bandwidth costs if required without compromising availability. Organizations are effectively avoiding over provisioning which lowers overall WAN costs.
The centralised control enables changes to be implemented and quickly pushed in the market to network hardware for example routers and switches.
After a primary investment SD-WAN can improve a business’s connectivity between branch locations, the primary office, data centres and also the cloud while reducing running costs making long lasting savings with time.
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