Defining QoS Requirements for Network Traffic
To implement QoS, you need to identify the types of network traffic, determine
the requirements for each, divide the traffic into classes, and then set
policies for those classes.
A network audit helps identify the types of traffic on the network.
The relative importance of each application is a business decision, accomplished
by a business audit. Applications should be grouped into classes that
have about the same QoS requirements. Some common classes include:
Voice, Interactive, Mission-critical, Transactional, Best-effort, and
Scavenger.
A QoS policy then can be created for each class of traffic. You need to
decide such things as allocated bandwidth (minimum and/or maximum),
prioritization, and congestion avoidance.