Cisco 3845 Software Guide - Page 536

Configuring QoS Chapter 27 Configuring QoS Switch(config-pmap)# class classout3 Switch(config-pmap-c)# shape average 10000000 Switch(config-pmap-c)# exit Switch(config-pmap)# exit Switch(config)# interface gigabitethernet0/1 Switch(config-if)# service-policy output out-policy Switch(config-if)# exit Configuring Port Shaping Port shaping is applied to all traffic leaving an interface. It uses a policy map with only class default when the maximum bandwidth for the port is specified by using the shape average command. A child policy can be attached to the class-default in a hierarchical policy map format to specify class-based and VLAN-based actions. Beginning in privileged EXEC mode, follow these steps to use port shaping to configure the maximum permitted average rate for a class of traffic: Step 1 Step 2 Command configure terminal policy-map policy-map-name Step 3 class class-default Step 4 shape average {target bps | percent value} Step 5 service-policy policy-map-name Step 6 Step 7 Step 8 end show policy-map [policy-map-name [class class-map-name]] copy running-config startup-config Purpose Enter global configuration mode. Create a hierarchical policy map by entering the hierarchical policy map name, and enter policy-map configuration mode for the parent policy. Enter a policy-map class configuration mode for the default class. Specify the average class-based shaping rate. • For target bps, specify the average bit rate in bits per second. The range is from 1000 to 10000000000 (10 Gigabits). • Enter percent value to set the percentage of interface bandwidth for peak information rate. The range is 0 to 100 percent. The percentage is based on the port operational link speed. Setting the percent to 0 disables shaping. Specify the child policy-map to be used in the hierarchical policy map if required. Return to privileged EXEC mode. Verify your entries. (Optional) Save your entries in the configuration file. After you create the policy map, attach it to an interface or an EFP. 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 an existing hierarchical policy map, to delete a port shaping configuration, or to remove the policy map from the hierarchical policy map. This example shows how to configure port shaping by configuring a hierarchical policy map that shapes a port to 90 Mb/s, allocated according to the out-policy policy map configured in the previous example. Switch(config)# policy-map out-policy-parent Switch(config-pmap)# class class-default Switch(config-pmap-c)# shape average 90000000 Switch(config-pmap-c)# service-policy out-policy Switch(config-pmap-c)# exit 27-48 Cisco ME 3800X and 3600X Switch Software Configuration Guide OL-23400-01