Cisco IE 4000, Software Configuration Manual

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Configuring QoS
Configuring QoS
Use the no form of the appropriate command to delete a policy map or table map or remove an assigned CoS, DSCP,
precedence, or QoS-group value.
This example uses a policy map to remark a packet. The first marking (the set command) applies to the QoS default class
map that matches all traffic not matched by class AF31-AF33 and sets all traffic to an IP DSCP value of 1. The second
marking sets the traffic in classes AF31 to AF33 to an IP DSCP of 3.
Switch(config)# policy-map Example
Switch(config-pmap)# class class-default
Switch(config-pmap-c)# set ip dscp 1
Switch(config-pmap-c)# exit
Switch(config-pmap)# class AF31-AF33
Switch(config-pmap-c)# set ip dscp 3
Switch(config-pmap-c)# exit
Switch(config-pmap)# exit
Switch(config)# interface fastethernet0/1
Switch(config-if)# service-policy input Example
Switch(config-if)# exit
Configuring Per-Port Per-VLAN QoS with Hierarchical Input Policy Maps
Per-port, per-VLAN QoS allows classification based on VLAN IDs for applying QoS for frames received on a given
interface and VLAN. This is achieved by using a hierarchical policy map, with a parent policy and a child policy.
Note these guidelines and limitations when configuring per-port, per-VLAN QoS:

The feature is supported only by using a two-level hierarchical input policy map, where the parent level defines the
VLAN-based classification, and the child level defines the QoS policy to be applied to the corresponding VLAN or
VLANs.

You can configure multiple service classes at the parent level to match different combinations of VLANs, and you can
apply independent QoS policies to each parent-service class using any child policy map

A policy is considered a parent policy map when it has one or more of its classes associated with a child policy map.
Each class within a parent policy-map is called a parent-class. In parent classes, you can configure only the
match
vlan class-map configuration command. You cannot configure the match vlan command in classes within the child
policy map.

A per-port, per-VLAN parent level class map supports only a child-policy association; it does not allow any actions
to be configured. For a parent-level class map, you cannot configure an action or a child-policy association for the
class
class-default .
5. exit Return to policy-map configuration mode.
6. exit Return to global configuration mode.
7. interface interface-id Enter interface configuration mode for the interface to which you want to
attach the policy.
8. service-policy input policy-map-name Attach the policy map (created in Step 2) to the ingress interface.
9. end Return to privileged EXEC mode.
10. show policy-map [ policy-map-name
[ class class-map-name ]]
Verify your entries.
11. copy running-config startup-config (Optional) Save your entries in the configuration file.
Command Purpose