IES Service Configuration Commands
7750 SR OS Services Guide Page 1015
from the size of each packet for accounting functions only. The 14 bytes are not actually removed
from the packet, only the accounting size of the packet is affected.
As mentioned above, the variable accounting size offered by the packet-byte-offset command is
targeted at the queue and queue group level. When the queue group represents the last-mile
bandwidth constraints for a subscriber, the offset allows the HSMDA queue group to provide an
accurate accounting to prevent overrun and underrun conditions for the subscriber. The accounting
size of the packet is ignored by the secondary shapers, the scheduling priority level shapers and the
scheduler maximum rate. The actual on-the-wire frame size is used for these functions to allow an
accurate representation of the behavior of the subscriber’s packets on an Ethernet aggregation
network.
The packet-byte-offset value can be overridden for the HSMDA queue at the SAP or subscriber
profile level.
The no form of the command removes any accounting size changes to packets handled by the queue.
The command does not effect overrides that may exist on SAPs or subscriber profiles associated with
the queue.
Parameters add add-bytes — The add keyword is mutually exclusive with the subtract keyword. Either the add
or subtract keyword must be specified. The add keyword is used to indicate that the following
byte value should be added to the packet for queue and queue group level accounting functions.
The corresponding byte value must be specified when executing the packet-byte-offset
command.
Values 0 — 31
subtract sub-bytes — The subtract keyword is mutually exclusive with the add keyword. Either the
add or subtract keyword must be specified. The subtract keyword is used to indicate that the
following byte value should be subtracted from the packet for queue and queue group level
accounting functions. The corresponding byte value must be specified when executing the
packet-byte-offset command.
Values 1 — 32
queue
Syntax queue queue-id [create]
no queue queue-id
Context config>service>ies>if>sap>egress>hsmda-queue-over
config>service>ies>if>sap>ingress>hsmda-queue-over
Description This command, within the QoS policy hsmda-queue context, is a container for the configuration
parameters controlling the behavior of an HSMDA queue. Unlike the standard QoS policy queue
command, this command is not used to actually create or dynamically assign the queue to the object
which the policy is applied. The queue identified by queue-id always exists on the SAP or subscriber
context whether the command is executed or not. In the case of HSMDA SAPs and subscribers, all
eight queues exist at the moment the system allocates an HSMDA queue group to the object (both
ingress and egress).
Best-Effort, Expedited and Auto-Expedite Queue Behavior Based on Queue-ID
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