Alcatel-Lucent 7950 Quality Of Service Manual page 500

Generic Commands
the queue or scheduler does not receive bandwidth during the port scheduler's within-cir pass and the
cir-level parameter is ignored. If the cir-weight parameter is 1 or greater, the cir-level parameter comes
into play.
Values
cir-level cir-level — Defines the port priority the queue or scheduler will use to receive bandwidth for its
within-cir offered-load. If the cir-weight parameter is set to a value of 0 (the default value), the queue or
scheduler does not receive bandwidth during the port scheduler's within-cir pass and the cir-level
parameter is ignored. If the cir-weight parameter is 1 or greater, the cir-level parameter comes into play.
Values
Default
rate
Syntax rate [pir-rate] [cir cir-rate]
no rate
Context config>qos>scheduler-policy>tier>scheduler
config>qos>port-scheduler-policy>max-rate
Description
The rate command defines the maximum bandwidth that the scheduler can offer its child queues or
schedulers. The maximum rate is limited to the amount of bandwidth the scheduler can receive from its
parent scheduler. If the scheduler has no parent, the maximum rate is assumed to be the amount available to
the scheduler. When a parent is associated with the scheduler, the CIR parameter provides the amount of
bandwidth to be considered during the parent scheduler's 'within CIR' distribution phase.
The actual operating rate of the scheduler is limited by bandwidth constraints other then its maximum rate.
The scheduler's parent scheduler may not have the available bandwidth to meet the scheduler's needs or the
bandwidth available to the parent scheduler could be allocated to other child schedulers or child queues on
the parent based on higher priority. The children of the scheduler may not need the maximum rate available
to the scheduler due to insufficient offered load or limits to their own maximum rates.
When a scheduler is defined without specifying a rate, the default rate is max. If the scheduler is a root
scheduler (no parent defined), the default maximum rate must be changed to an explicit value. Without this
explicit value, the scheduler will assume that an infinite amount of bandwidth is available and allow all child
queues and schedulers to operate at their maximum rates.
The no form of this command returns all queues created with this queue-id by association with the QoS
policy to the default PIR and CIR parameters.
Parameters
pir pir — The pir parameter accepts a step multiplier value that specifies the multiplier used to determine
the PIR rate at which the queue will operate.
To calculate the actual PIR rate, the rate described by the queue's rate is multiplied by the pir-rate.
The SAP ingress context for PIR is independent of the defined forwarding class (fc) for the queue. The
default pir and definable range is identical for each class. The PIR in effect for a queue defines the
maximum rate ate which the queue will be allowed to forward packets in a given second, thus shaping
the queue's output.
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7950 XRS Quality of Service Guide