Cisco Cisco IOS Software Release 12.2(27)SBC

The following configuration example shows how to configure a VLAN tag-based QoS policy using the 
PRE3 hierarchical queuing framework. In the example, the policy map named service1 defines QoS 
services for two VLAN traffic classes: vlans_5_to_10 and vlans_11_to_14. The child-policy1 defines 
QoS services for voice, video, data, and default traffic, and is applied to both of the VLAN classes in 
service1.

policy-map child-policy1

class voip

police 1000000

priority level 1

class video

police 5000000

priority level 2

class data

bandwidth remaining ratio 500

class class-default

bandwidth remaining ratio 1

policy-map service1

class vlans_5_to_10

shape average 10000000

bandwidth remaining ratio 100

service-policy child-policy1

class vlans_11_to_14

shape average 10000000

bandwidth remaining ratio 100

service-policy child-policy1

The following configuration example shows an invalid configuration in which the subinterface-shaper 
policy is attached to the Gigabit Ethernet subinterface 1/1/1.5 and the vlangroup-shapers policy is 
attached to the main interface, Gigabit Ethernet interface 1/1/1. In this example, the traffic classes 
defined in the subinterface-shaper policy match the VLAN-group classes in the vlangroup-shapers 
policy. As a result, this configuration is invalid because the router does not support the attachment of a 
QoS policy on a subinterface that matches any of the VLAN-group traffic classes in a policy attached to 
the main interface.

policy-map subinterface-shaper

class class-default

shape average 10000000

!

policy-map vlangroup-shapers

class vlan_5_to_10

shape average 10000000

class vlan_11_to_14

shape average 10000000

!

interface GigabitEthernet 1/1/1

service-policy output vlangroup-shapers

!

interface GigabitEthernet 1/1/1.5