Introduction - Alcatel-Lucent 7950 Quality Of Service Manual

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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.
Below are the capabilities and limitations for CFHP under a multi-service-site:
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•
•
•
*A:Dut-A>config>service>cust>multi-service-site# pwc
-------------------------------------------------------------------------------
Present Working Context :
-------------------------------------------------------------------------------
<root>
configure
service
customer 2
multi-service-site "mss1"
-------------------------------------------------------------------------------
*A:Dut-A>config>service>cust>multi-service-site# info
----------------------------------------------
assignment port 9/1/4
ingress
policer-control-policy "pcp"
exit
egress
policer-control-policy "pcp"
exit
----------------------------------------------
Example of a service using mss is as below:
*A:Dut-A>config>service>vpls# pwc
-------------------------------------------------------------------------------
Present Working Context :
-------------------------------------------------------------------------------
<root>
configure
service
Page 570
Support for SAP only
Assignment is for port only (not for card)
Supported both in Ingress and Egress
Policer Overrides are not supported under a multi-service-site.
7950 XRS Quality of Service Guide