QoS Scheduler Policies
Quality of Service Guide 543
orphan-override [level priority-level] [weight
weight] [cir-level priority-level] [cir-weight
cir-weight]
The following displays a scheduler policy configuration example:
*A:ALA-48>config>qos>port-sched-plcy# info
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description "Test Port Scheduler Policy"
orphan-override weight 50 cir-level 4 cir-weight 50
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*A:ALA-48>config>qos>port-sched-plcy#
Configuring Port Parent Parameters
The port-parent command defines a child/parent association between an egress queue and a
port based scheduler or between an intermediate service scheduler and a port based scheduler.
The command may be issued in three distinct contexts; sap-egress>queue queue-id, and
network-queue> queue queue-id and scheduler-policy>scheduler scheduler-name the
network-queue> queue queue-id context. The port-parent command allows for a set of
within-cir and above-cir parameters that define the port priority levels and weights for the
queue or scheduler. If the port-parent command is executed without any parameters, the
default parameters are assumed.
Within-CIR Priority Level Parameters
The within-cir parameters define which port priority level the queue or scheduler 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 are the port-parent
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 queue or scheduler does not receive bandwidth from the within-cir distribution. Instead
all bandwidth for the queue or scheduler must be allocated in the port scheduler’s above-cir
pass.
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