Alcatel-Lucent 7950 Quality Of Service Manual page 507

orphan-override
Syntax orphan-override [level priority-level] [weight percent] [cir-level priority-level] [cir-weight cir-
weight]
no orphan-override
Context config>qos>port-scheduler-policy
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
7950 XRS Quality of Service Guide
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.
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