SD WAN (Software Defined Wide Area Network) lets you connect multiple agencies to multiple interfaces on an SD WAN capable firewall. The SD WAN firewall is application aware and automatically steers traffic over different companies depending on certain conditions.
For example you may connect an MPLS network on a single WAN connection and repair to the Internet about the second WAN connection. With SD WAN the traffic would then dynamically route over either connection determined by policies you define.
Overview
To comprehend how SD WAN works and how it benefits your organization it is very important first know how things were configured previously.
Consider cold and warm taps with an old-fashioned wash hand basin. Think of the hot tap (WAN 1 Interface) is linked to the MPLS Network and also the cold tap (WAN 2 Interface) is connected to the Internet.
Once the hot tap and cold taps are operated separately it is sometimes complicated to manipulate the temperature and flow in the water as they are totally outside of the other. Similarly, prior to SD WAN it was challenging to mix, control and manage traffic (business applications) across separate independent WAN Interfaces (within this example MPLS and Internet) just as the water in a old wash hand basin.
How come SD WAN better?
SD WAN is a little being a modern wash hand basin with both the hot and cold taps combined in an simple to adjust mixer tap. The temperature of the water can be controlled which enable it to even be automatically regulated to offer an ideal temperature of water at all times.
With SD WAN you will get granular control of traffic across all WAN networks with advanced flexibility and agility. By way of example, you are able to define policies have a tendency to send traffic from a main business application within the MPLS network for example but automatically switch over online VPN if the MPLS network is congested or unavailable.
SD WAN transfers the responsibility of traffic management from physical devices to software and enables you to effectively and securely route website visitors to remote locations like branch offices. Centralised control gives full visibility throughout the network and enables simple management.
To conclude SD WAN will provide you with complete treatments for how we dynamically route and prioritise traffic based on application type as well as other factors for example congestion and availability.
How can SD WAN benefit your company?
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 in the cloud. Together with the increased need for cloud-based services nowadays in this workplace SD WAN provides a much more robust and reliable network.
SD WAN is really a far more flexible option that enables a company to scale connectivity down and up as their business dictates and will automatically adjust and steer cloud-based traffic over different routes when congestion or supplier failure occurs. This gives a company to perform a much more efficient and cost-effective enterprise reducing bandwidth costs as needed without compromising availability. Corporations are effectively avoiding over provisioning which lowers overall WAN costs.
The centralised control enables changes to be implemented and quickly pushed out to network hardware for example routers and switches.
After a basic investment SD-WAN can improve a business’s connectivity between branch locations, the primary office, data centres along with the cloud while reducing running costs making long term savings with time.
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