In the following example, precedence 6-7 traffic is given strict priority over all other traffic (which may cause starvation). To give precedence 4-5 traffic 50 percent of the remaining bandwidth and precedence 0-3 traffic the remaining 50 percent, follow the steps below.
First, configure three class-maps, as follows:
Router(config)# class-map match-any MDRR-CLASS-GOLD
Router(config-cmap)# match ip precedence 6 7
Router(config-cmap)# match mpls experimental 6 7
Router(config)# class-map match-any MDRR-CLASS-SILVER
Router(config-cmap)# match ip precedence 4 5
Router(config-cmap)# match mpls experimental 4 5
Router(config)# class-map match-any MDRR-CLASS-BRONZE
Router(config-cmap)# match ip precedence 0 1 2 3
Router(config-cmap)# match mpls experimental 0 1 2 3
You can also configure this example using two class-maps and then use the class-default to include all other traffic. It is also possible to configure more than 4 precedences in a single class; however, it requires the use of additional match commands.
Next, attach all three classes to a policy map. If none of the classes is a priority class, the maximum number of classes configurable, including the class-default class, is seven. When class-default is not specified, at least 1 percent must be allocated to this class.
