Dell Force10 S4820T S4820T Configuration Guide - Page 764

www.dell.com | support.dell.com Policy-based QoS Configurations Policy-based QoS configurations consist of the components shown in Figure 38-9. Figure 38-9. Constructing Policy-based QoS Configurations Interface Input Service Policy 0 Input Policy Map 7 Input Policy Map Output Service Policy 0 Output Policy Map 7 Output Policy Map Class Map DSCP Input QoS Policy L3 ACL L3 Fields Rate Policing Outgoing Marking Output QoS Policy Rate Limiting WRED B/W % Classify Traffic Class maps differentiate traffic so that you can apply separate quality of service policies to each class. For both class maps, Layer 2 and Layer 3, FTOS matches packets against match criteria in the order that you configure them. Create a Layer 3 class map A Layer 3 class map differentiates ingress packets based on DSCP value or IP precedence, and characteristics defined in an IP ACL. You may specify more than one DSCP and IP precedence value, but only one value must match to trigger a positive match for the class map. 1. Create a match-any class map using the command class-map match-any or a match-all class map using the command class-map match-all from CONFIGURATION mode, as shown in Figure 38-10. 764 | Quality of Service (QoS)