Class Fair Hierarchical Policing (CFHP)
In This Section
This section provides information to configure CFHP QoS policies using the command line
interface.
Topics in this section include:
Introduction
CFHP merges the benefits of non-delay rate enforcement inherent to policers with the priority
and fairness sensitivity of queuing and scheduling. CFHP is implemented as a group of child
policers mapped to a parent policer where the rate enforced by the parent both obeys strict
priority levels and is class fair within a priority level. At the parent policer, the output of a
lower priority child policer cannot prevent forwarding of packets of a higher priority child
policer and when multiple child policers share the same priority level, the system maintains
a Fair Information Rate (FIR) for each child that is separate from a child's PIR and CIR rates.
Policers can also be used standalone. The parent is optional.
With 9.0R1, multi-service sites support policer-control-policy in the in the ingress and egress
in addition to scheduler-policy.
Quality of Service Guide
•
Introduction
•
Parent Policer Priority and Unfair Sensitive Discard Thresholds
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CFHP Ingress and Egress Use Cases
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Post-CFHP Queuing and Scheduling
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CFHP Policer Control Policy
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CFHP Child Policer Definition and Creation
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Policer Enabled SAP QoS Policy Applicability
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Child Policer Parent Association
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Profile Capped Policers
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Policer Interaction with Initial Profile, Discard Eligibility, and Ingress Priority
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