Introduction
While Internet bandwidth increases continually for remote sites, the application demand for that bandwidth can almost be guaranteed to grow at an even faster rate. Uncontrolled application contention for that limited resource results in degraded quality for applications. Quality of Service, or QoS, is the broad-brush term for technology that resolves the application performance problem. QoS solutions
prioritize applications and redistribute available bandwidth so that important applications receive sufficient bandwidth to perform as desired. In this report, Tolly will outline key concepts and considerations for benchmarking and validating the
capabilities of QoS solutions.
There are dozens of vendors offering SD-WAN solutions and QoS is likely to be an important part of every solution. QoS is implemented many different ways. This is not surprising since there is no industry-standard way of implementing QoS. While there are standard ways of marking the desired QoS level of packets, that is where it ends. The implementation is up to the vendor. Period.The number of queues, prioritization algorithms, transport health tracking, etc. will differ across SD-WAN vendors.
