The first step in implementing QoS is identifying the traffic on the network and determining QoS requirements for the traffic.
The next step is determining the QoS problems of users. Measure the traffic on the network during congested periods. Conduct CPU utilization assessment on each of their network devices during busy periods to determine where problems might be occurring.
Next, determine the business model and goals, and obtain a list of business requirements, in order to define the number of classes so that you can determine the business requirements for each traffic class.
Finally, define the service levels required by different traffic classes in terms of response time and availability. What is the impact on business if a transaction is delayed by two or three seconds? Can file transfers wait until the network is quiescent?
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