Cisco 3845 Software Guide - Page 514

Configuring QoS Chapter 27 Configuring QoS Configuring Input Class Maps You use the class-map command to name and to isolate a specific traffic flow (or class) from all other traffic. A class map defines the criteria to use to match against a specific traffic flow to further classify it. You define match criteria with one or more match statements entered in the class-map configuration mode. Match statements can include criteria such as an ACL, inner or outer CoS value, DSCP value, IP precedence values, MPLS experimental labels, or inner or outer VLAN IDs. In an input policy, the match criteria acts on the packet on the wire before any VLAN-mapping rewrite operations on ingress. Beginning in privileged EXEC mode, follow these steps to create a class map and to define the match criterion to classify traffic: Step 1 Step 2 Command configure terminal class-map [match-all | match-any] class-map-name Purpose Enter global configuration mode. Create a class map, and enter class-map configuration mode. By default, no class maps are defined. • For class-map-name, specify the name of the class map. • (Optional) Use the match-all keyword to perform a logical AND of all matching statements under this class map. All match criteria in the class map must be matched. Note The match-all keyword is supported only for outer VLAN and inner VLAN or outer CoS and inner CoS matches for QinQ packets. The match-all keyword is rejected for all other mutually exclusive match criteria. • (Optional) Use the match-any keyword to perform a logical OR of all matching statements under this class map. One or more match criteria must be matched. 27-26 Cisco ME 3800X and 3600X Switch Software Configuration Guide OL-23400-01