Policer Enabled Sap Qos Policy Applicability - Alcatel-Lucent 7450 Quality Of Service Manual

Policer Enabled SAP QoS Policy Applicability

Policer Enabled SAP QoS Policy Applicability
Policers are not created on a SAP or subscriber or multi-service site context until at least one
forwarding class has been mapped to the policer. Simply creating a policer within a QoS
policy does not cause policers to be created on the SAPs or subscribers or multi-service sites
where the policy is applied.
SAP QoS policy applicability and policy policer forwarding class mappings are dependent on
policer resource availability. Attempting to map the first forwarding class to a policer causes
the policer to be created on the SAPs or subscribers or multi-service site where the policy is
applied. If the forwarding plane where the SAP or subscriber or multi-service site exists either
doesn't support policers or has insufficient resources to create the policer for the object, the
forwarding class mapping will fail.
Once a forwarding class is successfully mapped to a policer within the policy, attempting to
apply the policy to a SAP or a subscriber or multi-service site where the policer cannot be
created either due to lack of policer support or insufficient policer resources will fail.
Policing is supported only on Ethernet SAPs or Ethernet based subscribers. Policing is also
only supported on FlexPath2 based systems or IOMs with the exception of CCAG and
HSMDA SAPs or subscribers. This feature applies to the 7450 ESS and 7750 SR only.
Child Policer Parent Association
Each policer configured within a SAP ingress or SAP egress QoS policy may be configured
to be child policer by defining a parent arbiter association using the parent command. If the
command is not executed, the policer operates as a stand-alone policer wherever the policy is
applied. If the parent command is executed, but the defined arbiter name does not exist within
the SAP context or a subscriber or multi-service site context, the policer is treated as an
orphan. The SAP or subscriber or multi-service site context is placed into a degraded state.
The system indicates the degraded state by the system setting the ingress-policer-mismatch
or egress-policer-mismatch flag for the object. An orphaned policer functions in the same
manner as a policer without a parent defined.
An arbiter exists on a SAP when a policer-control-policy containing the arbiter is applied to
the appropriate direction (ingress or egress) of the SAP. An arbiter exists on a subscriber
when a policer-control-policy containing the arbiter is applied to the subscriber's sub-profile
in the appropriate direction as well (applies to the 7450 ESS and 7750 SR).
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