Dell PowerConnect 55xx Systems User Guide 683FILE LOCATION: C:\Users\gina\Desktop\Checkout_new\Maintenance Projects\DellContax\CxUGQoS.fmD E L L C O N F I D E N T I A L – P R E L I M I N A R Y 9 / 1 1 / 1 2 - F O R P R O O F O N LYConfiguring DSCP Mapping Using CLI CommandsThe following table summarizes the CLI commands for setting the fields inthe DSCP Mapping page.The following is an example of the CLI commands:Class MappingA Class Map defines a traffic flow associated with ACL(s). A MAC-basedACL, IP-based ACL, and an IPv6-based ACL can be combined into a classmap. Class maps are configured to match packet criteria on a match-all ormatch-any basis. They are matched to packets on a first-fit basis, meaningthat the action associated with the first-matched class map is the actionperformed by the system. Packets that match the same class map belong tothe same flow.There are two possible types of matching:• match-all — Traffic matches class map if it matches IP/IPV6 and MACACLs• match-any — Traffic matches class map if it matches at least one of theACLsIf a more complex set of rules is needed, several class maps can be groupedinto a super-group called a policy (see "Defining Class Mapping Using CLICommands" on page 685).Table 22-12. DSCP Mapping CLI CommandsCLI Command Descriptionqos map policed-dscp dscp-listto dscp-mark-downno qos map policed-dscp [dscp-list]Configures the policed-DSCP map forremarking purposes.Use the no form of this command torestore the default configuration.console(config)# qos map policed-dscp 3 to 43
