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Cisco ME 3800X and 3600X Switch Software Configuration Guide
OL-23400-01
Chapter 27 Configuring QoS
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:
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
Command
Purpose
Step 1
configure terminal
Enter global configuration mode.
Step 2
policy-map policy-map-name
Create a hierarchical policy map by entering the hierarchical
policy map name, and enter policy-map configuration mode for
the parent policy.
Step 3
class class-default
Enter a policy-map class configuration mode for the default class.
Step 4
shape average {target bps | percent value}
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.
Step 5
service-policy policy-map-name
Specify the child policy-map to be used in the hierarchical policy
map if required.
Step 6
end
Return to privileged EXEC mode.
Step 7
show policy-map [policy-map-name [class
class-map-name]]
Verify your entries.
Step 8
copy running-config startup-config
(Optional) Save your entries in the configuration file.
