Alcatel-Lucent 7450 Quality Of Service Manual page 686

Advanced QoS Policy Command Reference
Description This command is used to create a stepped like behavior where the operational PIR will round up to the
nearest increment of the specified granularity before being applied to the child. The only exception is
when the distributed bandwidth is less than 1% above a lower step value in which case the lower step
value is used.
This stepped behavior may be useful when the bandwidth used by an active child is well known. While
the above-offered-cap function automatically adds a specified amount to the operational PIR of a child,
the granularity function only increments the operational PIR to the next step value. While not expected
to be used in conjunction, the above-offered-cap and granularity commands may be used
simultaneously in which case the above-offered-cap increase will be applied first followed by the
granularity rounding to the next step value.
If the granularity command is used with a percent based value, the rounding up function of the
configured PIR value on the policer or queue is based on the child's administrative PIR. In this case,
care should be taken that the child is either configured with an explicit PIR rate (other than max) or the
child's administrative PIR is defined using the percent-rate command with the local parameter enabled
if an explicit value is not desired. When a maximum PIR is in use on the child, the system attempts to
interpret the maximum child forwarding rate. This rate could be very large if the child is associated
with multiple ingress or egress ports.
If the child's administrative PIR is modified while a percent based granularity is in effect, the system
automatically uses the new relative rounding value the next time the child's operational PIR is
determined.
When this command is not specified or removed, the system makes no attempt to round up the child's
determined operational PIR.
The no form of this command is used to remove the operational PIR rounding behavior from all child
policers and queues associated with the policy.
Parameters
percent-of-admin-pir — When the percent qualifier is used, the following percent-of-admin-pir
rate-in-kilobits-per-second — When the rate qualifier is used, the following rate-in-kilobits-per-
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parameter specifies the percentage of the child's administrative PIR that should be used as the
rounding step value. If a value of 0 or 0.00 is used, the system will interpret this equivalent to
no granularity.
Default None, the rounding percentage of administrative PIR must be
specified when the percent qualifier is used.
Values 0.00 to 100.00
second parameter specifies an explicit number of kilobits-per-second (1000 bits-per-second)
that should be as the child's rounding step value. If a rate step of 0 is specified, the system
interprets this equivalent to no granularity.
Default None, the rounding rate step must be specified when the rate
qualifier is used.
Values 0 to 100,000,000
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