Interface Configuration
7750 SR OS Interface Configuration Guide Page 327
The no form of this command returns the MBS size assigned to the queue to the value.
Default default
Parameters size-in-kbytes — The size parameter is an integer expression of the maximum number of kilobytes of
buffering allowed for the queue. For a value of 100 kbps, enter the value 100. A value of 0 causes
the queue to discard all packets.
Values 0 — 131072 or default
rate
Syntax rate pir-rate [cir cir-rate]
no rate
Context config>port>ethernet>access>egr>qgrp>qover>q
config>port>ethernet>access>ing>qgrp>qover>q
config>port>ethernet>network>egr>qover>q
Description This command specifies the administrative Peak Information Rate (PIR) and the administrative Com-
mitted Information Rate (CIR) parameters for the queue. The PIR defines the maximum rate that the
queue can transmit packets out an egress interface (for SAP egress queues). Defining a PIR does not
necessarily guarantee that the queue can transmit at the intended rate. The actual rate sustained by the
queue can be limited by oversubscription factors or available egress bandwidth.
The CIR defines the rate at which the system prioritizes the queue over other queues competing for
the same bandwidth. In-profile packets are preferentially queued by the system at egress and at subse-
quent next hop nodes where the packet can traverse. To be properly handled as in- or out-of-profile
throughout the network, the packets must be marked accordingly for profiling at each hop.
The CIR can be used by the queue’s parent commands cir-level and cir-weight parameters to define
the amount of bandwidth considered to be committed for the child queue during bandwidth allocation
by the parent scheduler.
The rate command can be executed at anytime, altering the PIR and CIR rates for all queues created
through the association of the SAP egress QoS policy with the queue-id.
The no form of the command returns all queues created with the queue-id by association with the
QoS policy to the default PIR and CIR parameters (max, 0).
Default rate max cir 0 — The max default specifies the amount of bandwidth in kilobits per second
(thousand bits per second). The max value is mutually exclusive to the pir-rate value.
Parameters pir-rate — Defines the administrative PIR rate, in kilobits, for the queue. When the rate command is
executed, a valid PIR setting must be explicitly defined. When the rate command has not been
executed, the default PIR of max is assumed.
Fractional values are not allowed and must be given as a positive integer.
The actual PIR rate is dependent on the queue’s adaptation-rule parameters and the actual
hardware where the queue is provisioned.
Values 1 — 100000000, max
Default max
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