Service Ingress Qos Policy Configuration Considerations - Alcatel-Lucent 7210 SAS D Quality Of Service Manual

Overview

Service Ingress QoS Policy Configuration Considerations

The num-qos-classifiers parameter cannot be modified when the policy is in use (for example,
when it is associated with a SAP). Other parameters in the SAP ingress policy can be changed.
When changing other parameters (for example, fc meter map or fc classification match criteria) for
a policy which is in use, the system recomputes the resources required due to accomodate the
change. If the resources required exceeds the configured value for num-qos-classifiers, then the
change is not allowed.
If more resources are needed than what is configued in num-qos-classifiers for a existing policy,
then the following options are available.
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Copy the existing policy to a new policy, modify the num-qos-classifiers parameter,
modify the match criteria entries suitably, and finally modify the SAP configuration to
associate it with the new policy.
Ensure the existing policy is not in use by any SAP (if required change the SAP
configuration to disable the use of the QoS policy with the no qos form of the command),
change all the required parameters and finally modify the SAP configuration to use the
policy again.
Note that both these options have side-effects, for example, it resets the statistics
associated with the meters and can potentially cause existing traffic classification not to
take effect. But, the system will ensure that default policy is in use during the intermittent
time when a policy changes are being made following the steps given above.
In releases prior to release 3.0R1, the software always the computes the number of
resources (like classifiers and meters) required by a policy depending on policy
association with a Epipe service,VPLS service or both Epipe and VPLS service.
7210 SAS D, E OS Quality of Service Guide