SD WAN (Software Defined Wide Area Network) lets you connect multiple providers to multiple interfaces on an SD WAN capable firewall. The SD WAN firewall is application aware and automatically steers traffic over different service providers determined by certain conditions.
For example you could connect an MPLS network using one WAN connection and connect to the net on the second WAN connection. With SD WAN the traffic would then dynamically route over either connection based on policies you define.
Overview
To be aware of how SD WAN works and just how it benefits your organization you should first understand how things were configured previously.
Consider cold and warm taps while on an old-fashioned wash hand basin. Imagine the hot tap (WAN 1 Interface) is connected to the MPLS Network as well as the cold tap (WAN 2 Interface) is attached to the Internet.
When the hot tap and cold taps are operated separately it is hard to regulate the temperature and flow from the water because they are totally separate from each other. Similarly, ahead of SD WAN it had been challenging to mix, control and manage traffic (business applications) across separate independent WAN Interfaces (on this example MPLS and Internet) just as the water within an old wash hand basin.
Exactly why is SD WAN better?
SD WAN is quite as being a modern wash hand basin with both the new and cold taps combined in a simple to adjust mixer tap. The water temperature can be controlled which enable it to even be automatically regulated to offer you the best temperature all the time.
With SD WAN you will get granular control over traffic across all WAN networks with advanced flexibility and agility. For instance, you’ll be able to define policies that frequently send traffic from your main business application on the MPLS network for instance but automatically transition to the Internet VPN if the MPLS network is congested or unavailable.
SD WAN transfers the load of traffic management from physical devices to software and lets you effectively and securely route website visitors to remote locations for example branch offices. Centralised control gives full visibility across the network and enables ease of management.
In conclusion SD WAN will provide you with complete treating the method that you dynamically route and prioritise traffic determined by application type along with other factors for example congestion and availability.
How can SD WAN benefit your small business?
Lower bandwidth costs
Centralised network management
Full network visibility
Increased alternatives for vendor selection and connection type
SD-WAN benefits businesses by removing expensive routing hardware and instead provisioning connectivity and services from the cloud. With the increased need for cloud-based services in the current workplace SD WAN provides a much more robust and reliable network.
SD WAN can be a considerably more flexible option that enables a business to scale connectivity along as their business dictates and can automatically adjust and steer cloud-based traffic over different routes when congestion or supplier failure occurs. This gives an enterprise to own a lot more efficient and cost-effective enterprise reducing bandwidth costs when needed without compromising availability. Organizations 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 a primary investment SD-WAN can improve a business’s connectivity between branch locations, the main office, data centres as well as the cloud while reducing running costs making lasting savings as time passes.
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