Policy-Based QoS Configurations
Policy-based QoS configurations consist of the components shown in the following example.
Figure 103. Constructing Policy-Based QoS Configurations

Classify Traffic

Class maps differentiate traffic so that you can apply separate quality of service policies to different types
of traffic.
For both class maps, Layer 2 and Layer 3, the system matches packets against match criteria in the order
that you configure them.
722 Quality of Service (QoS)