Cisco 3845 Software Guide - Page 534

Configuring QoS Chapter 27 Configuring QoS This example shows how to set the precedence of output queues by setting bandwidth in kilobits per second. The classes outclass1, outclass2, and outclass3 and class-default get a minimum of 40000, 20000, 10000, and 10000 kb/s. Any excess bandwidth is divided among the classes in the same proportion as the CIR rate. Switch(config)# policy-map out-policy Switch(config-pmap)# class outclass1 Switch(config-pmap-c)# bandwidth 40000 Switch(config-pmap-c)# exit Switch(config-pmap)# class outclass2 Switch(config-pmap-c)# bandwidth 20000 Switch(config-pmap-c)# exit Switch(config-pmap)# class outclass3 Switch(config-pmap-c)# bandwidth 10000 Switch(config-pmap-c)# exit Switch(config-pmap)# class class-default Switch(config-pmap-c)# bandwidth 10000 Switch(config-pmap-c)# exit Switch(config-pmap)# exit Switch(config)# interface gigabitethernet 0/1 Switch(config-if)# service-policy output out-policy Switch(config-if)# exit This example shows how to allocate the excess bandwidth among queues by configuring bandwidth for a traffic class as a percentage of remaining bandwidth. The class outclass1 is given priority queue treatment. The other classes are configured to get percentages of the excess bandwidth if any remains after servicing the priority queue: outclass2 is configured to get 50 percent, outclass3 to get 20 percent, and the class class-default to get the remaining 30 percent. Switch(config)# policy-map out-policy Switch(config-pmap)# class outclass1 Switch(config-pmap-c)# priority Switch(config-pmap-c)# exit Switch(config-pmap)# class outclass2 Switch(config-pmap-c)# bandwidth remaining percent 50 Switch(config-pmap-c)# exit Switch(config-pmap)# class outclass3 Switch(config-pmap-c)# bandwidth remaining percent 20 Switch(config-pmap-c)# exit Switch(config-pmap)# exit Switch(config)# interface gigabitethernet 0/1 Switch(config-if)# service-policy output out-policy Switch(config-if)# exit This example shows how to match VLAN and CoS in the same policy. When you attach the service policy vlan to an interface, packets with the outer VLAN of 2 and an outer CoS of 2 are included in class map phb. Switch(config)# class-map vlan Switch(config-cmap)# match vlan 2 Switch(config-cmap)# exit Switch(config)# class-map phb Switch(config-cmap)# match cos 2 Switch(config-cmap)# exit Switch(config)# policy-map phb Switch(config-pmap)# class phb Switch(config-pmap-c)# bandwidth 1000 Switch(config-pmap-c)# exit Switch(config-pmap)# exit Switch(config)# policy-map vlan Switch(config-pmap)# class vlan Switch(config-pmap-c)# bandwidth 1000 Switch(config-pmap-c)# service-policy phb 27-46 Cisco ME 3800X and 3600X Switch Software Configuration Guide OL-23400-01