Alcatel-Lucent 7450 Quality Of Service Manual page 359

Description This command is used to modify the size of each packet handled by the queue by adding or subtracting
a number of bytes. The actual packet size is not modified; only the size used to determine the ingress
scheduling and profiling is changed. The packet-byte-offset command is meant to be an arbitrary
mechanism that can be used to either add downstream frame encapsulation or remove portions of
packet headers. Both the scheduling and profiling throughput is affected by the offset as well as the
stats (accounting) associated with the queue. The packet-byte-offset does not apply to drop statistics,
received valid statistics, or the offered managed and unmanaged statistics used by Ingress Multicast
Path Management.
The no version of this command is used to remove per packet size modifications from the queue.
Parameters add bytes — The add keyword is mutually exclusive to the subtract keyword. Either add or
subtract bytes — The subtract keyword is mutually exclusive to the add keyword. Either add or
parent
Syntax parent scheduler-name [weight weight] [level level] [cir-weight cir-weight] [cir-level cir-
level]
no parent
Context config>qos>sap-ingress>queue
config>qos>sap-egress>queue
Description This command defines an optional parent scheduler that further governs the available bandwidth given
the queue aside from the queue's PIR setting. When multiple schedulers and/or queues share a child
status with the parent scheduler, the weight or level parameters define how this queue contends with
the other children for the parent's bandwidth.
Checks are not performed to see if a scheduler-name exists when the parent command is defined on
the queue. Scheduler names are configured in the config>qos>scheduler-policy>tier level context.
Multiple schedulers can exist with the scheduler-name and the association pertains to a scheduler that
should exist on the egress SAP as the policy is applied and the queue created. When the queue is
created on the egress SAP, the existence of the scheduler-name is dependent on a scheduler policy
Quality of Service Guide
subtract must be specified. When add is defined the corresponding bytes parameter specifies
the number of bytes that is added to the size each packet associated with the queue for
scheduling, profiling and accounting purposes. From the queue's perspective, the packet size
is increased by the amount being added to the size of each packet.
Values
0 to 30, in steps of 2
Default None
subtract must be specified. When subtract is defined the corresponding bytes parameter
specifies the number of bytes that is subtracted from the size of each packet associated with
the queue for scheduling, profiling and accounting purposes. From the queue's perspective,
the packet size is reduced by the amount being subtracted from the size of each packet. The
minimum resulting packet size used by the system is 1 byte.
Values Values 0 to 64, in steps of 2
Default None
Service Egress and Ingress QoS Policies
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