SD-WAN solutions are nothing if not feature-rich. There may be so many features that you can’t keep them all straight – but all features are not equally important to your business environment. Quality-of-Service or QoS is arguably one of the most important. (You may also know it as Quality-of-Experience or QoE – same thing, different name.)
It is QoS that, ultimately, is responsible for making your WAN users happy. QoS is in charge of dividing up available bandwidth and making sure that applications that are important to your business get the quality treatment that they deserve.
It is QoS that moves traffic – transparently one hopes – to backup links in the event of main link failure.
It is QoS that – in some solutions at least – is smart enough to migrate traffic even in “brown out” conditions. That is, when the link is still “up” but not performing up to your application’s needs.
It is QoS that should be smart enough to know which of your multiple links makes the most economic sense to be using. For example, an LTE link might be great to have as a backup link but too expensive to use for traffic on a regular basis.
And, since QoS is, by nature, a proprietary function of these various SD-WAN systems, the only way for you to really know how it will work in your environment is to benchmark it.
Those are just a few reasons why you should care – why you should REALLY care!
The Tolly Group SD-WAN Benchmarking Best Practices for QoS report will help you in your efforts.