Cisco 3845 Software Guide - Page 521

Chapter 27 Configuring QoS Configuring QoS Step 4 Command set {cos cos_value | discard-class value | [ip] dscp dscp_value | [ip] precedence precedence_value | mpls experimental {imposition | topmost} experimental _value | qos-group value} Purpose Mark traffic by setting a new value in the packet, specifying a table map, or specifying a QoS group. • For cos cos_value, enter a new CoS value to be assigned to the classified traffic. The range is 0 to 7. • For discard-class value, enter the exact value to be marked for traffic to be discarded. The range is 0 to 7. • For [ip] dscp new-dscp, enter a new DSCP value to be assigned to the classified traffic. The range is 0 to 63 or valid af numbers, cs numbers, default, or ef. • For [ip] precedence new-precedence, enter a new IP-precedence value to be assigned to the classified traffic, specified as a number from 0 to 7 or by name: routine (0), priority (1), immediate (2), flash (3), flash-override (4), critical (5), internet (6), network (7). Note A class can have either DSCP or precedence marking. If one of these is already configured in a class and you configure the other keyword, the newer command overwrites the previous command. If the value configured for a set ip precedence class in an earlier class in a policy overlaps the value configured for a set ip dscp class in a later class, then the earlier configuration is always matched. Step 5 Step 6 Step 7 end show policy-map [policy-map-name [class class-map-name]] copy running-config startup-config • For mpls experimental imposition exp-number, enter the new MPLS experimental value to be set at tag imposition. This keyword specifies that the MPLS experimental value in a packet header is set with the new value after the packet is switched. This keyword applies only to MPLS packets that are MPLS routed. The range is 0 to 7. • mpls experimental topmost exp-number, enter the new MPLS experimental value for the outermost or topmost label. This keyword marks all valid MPLS packets. The range is 0 to 7. • For qos-group value, identify a QoS group to be used at egress to identify specific packets. The range is from 0 to 99. If the policy is already attached to an interface, you must exit policy-map class configuration mode before the modification is applied. Return to privileged EXEC mode. Verify your entries. (Optional) Save your entries in the configuration file. After you create the input policy map, attach it to a target. See the "Attaching a Service Policy to an Interface or EFP" section on page 27-56. Use the no form of the appropriate command to delete a policy map or remove an assigned CoS, DSCP, MPLS, precedence, or QoS-group value. OL-23400-01 Cisco ME 3800X and 3600X Switch Software Configuration Guide 27-33