Alcatel-Lucent 7450 Quality Of Service Manual page 257

policer
Syntax policer policer-id [create]
no policer policer-id
Context config>qos>sap-ingress
Description This command is used in the sap-ingress and sap-egress QoS policies to create, modify or delete a
policer. Policers are created and used in a similar manner to queues. The policer ID space is separate
from the queue ID space, allowing both a queue and a policer to share the same ID. The sap-ingress
policy may have up to 63 policers (numbered 1 through 63) may be defined while the sap-egress QoS
policy supports a maximum of 8 (numbered 1 through 8). While a policer may be defined within a QoS
policy, it is not actually created on SAPs or subscribers or multi-service site associated with the policy
until a forwarding class is mapped to the policer's ID.
All policers must be created within the QoS policies. A default policer is not created when a sap-
ingress or sap-egress QoS policy is created.
Once a policer is created, the policer's metering rate and profiling rates may be defined as well as the
policer's maximum and committed burst sizes (MBS and CBS respectively). Unlike queues which
have dedicated counters, policers allow various stat-mode settings that define the counters that will be
associated with the policer. Another supported feature—packet-byte-offset—provides a policer with
the ability to modify the size of each packet based on a defined number of bytes.
Once a policer is created, it cannot be deleted from the QoS policy unless any forwarding classes that
are mapped to the policer are first moved to other policers or queues.
The system will allow a policer to be created on a SAP QoS policy regardless of the ability to support
policers on objects where the policy is currently applied. The system only scans the current objects for
policer support and sufficient resources to create the policer when a forwarding class is first mapped
to the policer ID. If the policer cannot be created due to one or more instances of the policy not
supporting policing or having insufficient resources to create the policer, the forwarding class mapping
will fail.
The no form of this command is used to delete a policer from a sap-ingress or sap-egress QoS policy.
The specified policer cannot currently have any forwarding class mappings for the removal of the
policer to succeed. It is not necessary to actually delete the policer ID for the policer instances to be
removed from SAPs or subscriber or multi-service site associated with the QoS policy once all
forwarding classes have been moved away from the policer. It is automatically deleted from each
policing instance although it still appears in the QoS policy.
Parameters
policer-id — The policer-id must be specified when executing the policer command. If the
Quality of Service Guide
specified ID already exists, the system enters that policer's context to allow the policer's
parameters to be modified. If the ID does not exist and is within the allowed range for the QoS
policy type, a context for the policer ID will be created (depending on the system's current
create keyword requirements which may require the create keyword to actually add the new
policer ID to the QoS policy) and the system will enter that new policer's context for possible
parameter modification.
Values 1 to 63
Service Egress and Ingress QoS Policies
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