Configuring Hierarchical Modular QoS on Cisco ASR 9000 Series Routers
How to Configure Hierarchical QoS
QC-141
Cisco ASR 9000 Series Aggregation Services Router Modular Quality of Service Configuration Guide
OL-23108-02
Configuring Enhanced Hierarchical Ingress Policing
The difference between configuring enhanced hierarchical ingress policing and configuring hierarchical
ingress policing is the addition of the child-conform-aware command.
When used in the parent policer, the child-conform-aware command prevents the parent policer from
dropping any ingress traffic that conforms to the maximum rate specified in the child policer.
Restrictions
Enhanced Hierarchical Ingress Policing has the following limitations:
• Ingress direction only.
• Sum of all child policer rates cannot be greater than the parent policer rate.
• Single-rate two-color policer (color blind) only.
• Configurations that specify burst size in the police rate command are supported; configurations that
specify peak burst become single-rate three-color policers and are therefore rejected.
• Configure the child-conform-aware command only in the parent policer.
SUMMARY STEPS
1. configure
2. policy-map policy-name
3. class class-name
4. service-policy policy-map-name
5. police rate {value [units] | percent percentage} [burst burst-size [burst-units]] [peak-rate value
[units]] [peak-burst peak-burst [burst-units]]
6. child-conform-aware
7. conform-action [drop | set options | transmit]
8. exceed-action [drop | set options | transmit]
9. end
or
commit
DETAILED STEPS
Command or Action Purpose
Step 1
configure
Example:
RP/0/RSP0/CPU0:router# configure
Enters global configuration mode.
Step 2
policy-map
policy-name
Example:
RP/0/RSP0/CPU0:router(config)# policy-map
parent
Enters policy map configuration mode.
Creates or modifies a policy map that can be attached to one
or more interfaces to specify a service policy.
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