Alcatel-Lucent 7450 Quality Of Service Manual page 678

Advanced QoS Policy Command Reference
Parameters percent-of-admin-pir — When the percent qualifier is used, this parameter specifies the
rate-in-kilobits-per-second — When the rate qualifier is used, this parameter specifies an explicit
min-only — This optional parameter is used to reinterpret the increase as a minimum offered rate.
active-min-only — When this optional parameter is specified, the respective rate or percentage is
granularity
Syntax [no] granularity {percent percent-of-admin-pir | rate rate-in-kilobits-per-second}
Context config>qos>adv-config-policy>child-control>offered-measurement
Description This command is used to adjust the sensitivity of the virtual scheduler to changes in the child offered
rate. As the child offered rate is determined, it is compared to the previous offered rate. If the delta does
not exceed the sensitivity threshold determined for the current offered rate, the change in offered rate
is ignored for that iteration.
While it is assumed that changing the offered rate change sensitivity will be a rare occurrence, one may
want to react to smaller changes in the offered rate of a particular child policer or queue. Another
possible reason for changing the sensitivity is that it may be desired to lower the impact of changes in
offered rate on the virtual scheduler for a particular child by raising the granularity.
A side effect of higher sensitivity (lower granularity) is that the virtual scheduler may need to adjust
the distributed bandwidth between all children more often resulting in the possibility of lowering
resources available to other virtual scheduler instances on the slot.
A side effect of lower sensitivity (higher granularity) is that the parent virtual scheduler may distribute
insufficient bandwidth to the child resulting in dropped packets.
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percentage of the child's administrative PIR that should be added to the child's offered rate.
The new offered rate result is capped by the child's PIR. If a value of 0 or 0.00 is used, the
system interprets this equivalent to no add.
Default None, an increase percentage value must be specified when the
percent qualifier is used.
Values 1.00 to 100.00
number of kilobits-per-second (1000 bits-per-second) that should be added to the child's
offered rate. The new offered rate result is capped by the child's PIR. If a rate increase of 0 is
specified, the system interprets this equivalent to no add.
Default None, an increase rate value must be specified when the rate
qualifier is used.
Values 0 to 100,000,000
When this option is enabled, the system uses the specified increase as a minimum offered rate
even for inactive queues or policers associated with the policy.
treated as the minimum offered rate for a queue only when the queue has an actual non-zero
offered rate. This is intended to limit the artificial increase in offered rate to queues that are
currently active. Once a queue's measured offered rate drops to zero, the system stops
enforcing the minimum value.
Quality of Service Guide