SD WAN - An Overview
Questions often asked by network managers.
You can increase your bandwidth and keep it very affordable due to better prioritized traffic management.
When links go down, the system carries on seamlessly.
Even VoIP will remain connected.
You will save a great deal of time on the mundane task of troubleshooting every single device on your network.
SD WAN will allow you to connect to AWS and the cloud.
How does SD WAN work?
The SD WAN part of the system is a device that plugs in at a higher level.
The device has software that monitors all connections & bandwidth and a host of other measures you would use to control the total network.
If a link fails, the device compensates and sends critical data over the most reliable paths.
Even if a WAN link totally disconnects, current traffic will be delayed by no more than 300ms. Users will not notice or hardly notice, any drop in performance.
What is the difference between WAN and SD WAN?
Typically, your WAN (wide area network) will consist of links between devices in the Local Area Network of your premises. Your premises may include different offices and different locations.
It may also include 4G, ADSL, ethernet etc.
SD WAN is the software that allows control over all of these different services.
All on one screen and all in one place.
In this sense, it pulls all your different WAN elements together and makes them far easier to manage.
Why do I need SD WAN
Many businesses rely on internet services like voice, CRM and the storing of documents.
If a connection to the internet fails for any reason, or a device in the network fails, they cannot service their clients.
SD WAN has been designed to minimize such interruptions and handle any downtime seamlessly.
Those on the network simply do not know a background process has handled such a failure by reconfiguring and redirecting traffic to compensate.
SD WAN v MPLS
MPLS networks, as you may know, handle the flow of network traffic.
They allow the sharing of resources and offer a very efficient passing of packets of data from node to node.
They also offer alternative paths if something goes wrong with the network.
They do however have a high cost per megabyte. This is because they have to be configured so that all nodes can talk to each other.
SD WAN offers the same benefits of MPLS, but with extra benefits such as using any available internet link.
It sits over the top of MPLS and it does not matter what the service is or who is providing it.
It also uses data encryption for extra security.
New sites can easily and securely be added simply by applying an SD WAN node to it.
All these advantages substantially reduce the cost of extra bandwidth.
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