Alcatel-Lucent 7450 Quality Of Service Manual page 580

QoS Scheduler Policy Command Reference
Description This command override the default orphan behavior for port schedulers created using the port
scheduler policy. The default orphan behavior is to give all orphan queues and schedulers bandwidth
after all other properly parented queues and schedulers. Orphans by default do not receive any within-
cir bandwidth and receive above-cir bandwidth after priority levels 8 through 1 have been allocated.
The orphan-override command accepts the same parameters as the port-parent command in the SAP
egress and network queue policy contexts. The defined parameters are used as a default port-parent
association for any queue or scheduler on the port that the port scheduler policy is applied.
Orphan queues and schedulers are identified as:
A queue or scheduler may be properly parented to an upper level scheduler, but that scheduler may be
orphaned. In this case, the queue or scheduler receives bandwidth from its parent scheduler based on
the parent schedulers ability to receive bandwidth as an orphan.
Within-CIR Priority Level Parameters
The within-cir parameters define which port priority level the orphan queues and schedulers should be
associated with when receiving bandwidth for the queue or schedulers within-cir offered load. The
within-cir offered load is the amount of bandwidth the queue or schedulers could use that is equal to
or less than its defined or summed CIR value. The summed value is only valid on schedulers and is the
sum of the within-cir offered loads of the children attached to the scheduler. The parameters that
control within-cir bandwidth allocation for orphans are the orphan-override commands cir-level and
cir-weight keywords. The cir-level keyword defines the port priority level that the scheduler or queue
uses to receive bandwidth for its within-cir offered load. The cir-weight is used when multiple queues
or schedulers exist at the same port priority level for within-cir bandwidth. The weight value defines
the relative ratio that is used to distribute bandwidth at the priority level when more within-cir offered
load exists than the port priority level has bandwidth.
A cir-weight equal to zero (the default value) has special meaning and informs the system that the
orphan queues and schedulers do not receive bandwidth from the within-cir distribution. Instead all
bandwidth for the orphan queues and schedulers must be allocated from the port scheduler's above-cir
pass.
Above-CIR Priority Level Parameters
The above-cir parameters define which port priority level the orphan queues and schedulers should be
associated with when receiving bandwidth for the queue or schedulers above-cir offered load. The
above-cir offered load is the amount of bandwidth the queue or schedulers could use that is equal to or
less than its defined PIR value (based on the queue or schedulers rate command) less any bandwidth
that was given to the queue or scheduler during the above-cir scheduler pass. The parameters that
control above-cir bandwidth allocation for orphans are the orphan-override commands level and
weight keywords. The level keyword defines the port priority level that the scheduler or queue uses to
receive bandwidth for its above-cir offered load. The weight is used when multiple queues or
schedulers exist at the same port priority level for above-cir bandwidth. The weight value defines the
relative ratio that is used to distribute bandwidth at the priority level when more above-cir offered load
exists than the port priority level has bandwidth.
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• Any queue or scheduler that does not have a port-parent or parent command applied
• Any queue that has a parent command applied, but the specified scheduler name does not
exist on the queue's SAP, MSS or SLA Profile instance.
Quality of Service Guide