Alcatel-Lucent 7450 Quality Of Service Manual page 367

pir-rate — Defines the administrative PIR rate, in kilobits, for the queue. When the rate command
cir-rate — The cir parameter overrides the default administrative CIR used by the queue. When
rate
Syntax rate pir-rate {max | kilobits-per-second}
no rate
Context config>qos>sap-egress>hsmda-queues>queue
Description
This command configures a rate limit (PIR) for scheduling packets out of the queue and an optional
CIR rate used to determine the profile of packets scheduled from the queue. Configuring a rate limit
for a queue on an HSMDA is optional; the default rate is set to maximum (max) causing the shaper to
have no effect. The cir keyword is used to configure the rate threshold between the in-profile and out-
of-profile state of the queue during scheduling from the queue. This command only applies to the
7450 ESS and 7750 SR.
Since the CIR leaky bucket is updated during scheduling events and not enqueuing events. The
profiling function is not based on packet arrival. Instead, the queue absorbs bursts that exceed the
queues forwarding rate. In this case, burst tolerance is more heavily affected by the maximum queue
depth (mbs) and the PIR shaping behavior then the CIR leaky bucket behavior.
Egress Profiling Based Dot1P Remarking
HSMDA egress queues are capable of remarking Dot1P and DEI bits based on the current state of the
queues CIR. Egress Dot1P remarking is enabled at the forwarding class level. Using egress profiling
based Dot1P remarking, either two distinct Dot1P values may be used to distinguish in-profile and out-
of-profile, or just the DEI bit may be toggled.
SAP and Subscriber Queue Rate Overrides
The shaping rate and CIR values may be overridden on each SAP or subscriber to which the QoS
policy is associated.
Quality of Service Guide
is executed, a valid PIR setting must be explicitly defined. When the rate command has not
been executed, the default PIR of max is assumed.
Fractional values are not allowed and must be given as a positive integer.
The actual PIR rate is dependent on the queue's adaptation-rule parameters and the actual
hardware where the queue is provisioned.
Values [1 to 200000000 | max] kbps
Default
max
the rate command is executed, a CIR setting is optional. When the rate command has not
been executed or the cir parameter is not explicitly specified, the default CIR (0) is assumed.
Fractional values are not allowed and must be given as a positive integer.
Values
[0 to 200000000 | max] kbps
Default 0
Service Egress and Ingress QoS Policies
367