Service Egress and Ingress QoS Policies
Quality of Service Guide 325
description
Syntax description description string
no description
Context config>qos>sap-egress>policer
Description The description command is used to define an informational ASCII string associated with the policer
control policy. The string value can be defined or changed at any time once the policy exists.
The no form of this command is used to remove an explicit description string from the policer.
Default no description
Parameters description string — The description-string parameter defines the ASCII description string for the
policer control policy. The description string can be up to 80 characters. If the string contains
spaces, it must be placed within beginning and ending double quotation marks. Beginning and
ending quotation marks are not considered part of the description string. Only printable
ASCII characters are allowed in the string. The sting does not need to be unique and may be
repeated in the descriptions for other policer control policies or other objects. If the command
is executed without the description-sting present, any existing description string will be
unaffected.
Default None
adaptation-rule
Syntax adaptation-rule [pir {max | min | closest}] [cir {max | min | closest}]
no adaptation-rule
Context config>qos>sap-egress>policer
Description This command is used to define how the policer’s configuration parameters are translated into the
underlying hardware capabilities used to implement each policer instance. For instance, the configured
rates for the policer need to be mapped to the timers and decrement granularity used by the hardware's
leaky bucket functions that actually perform the traffic metering. If a rate is defined that cannot be
exactly matched by the hardware, the adaptation-rule setting provides guidance for which hardware
rate should be used.
The max keyword tells the system that the defined rate is the maximum rate that should be given to
the policer. If the hardware cannot exactly match the given rate, the next lowest hardware supported
rate is used.
The min keyword tells the system that the defined rate is the minimum rate that should be given to the
policer. If the hardware cannot exactly match the given rate, the next highest hardware supported rate
is used.
The closest keyword tells the system that the defined rate is the target rate for the policer. If the
hardware cannot exactly match the given rate, the system will use the closest hardware supported rate
compared to the target rate.
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