Alcatel-Lucent 7710 SR OS, Interface Configuration Manual

Page: 210 / 436

Configuration Commands
Page 210 7710 SR OS Interface Configuration Guide
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
cir-rate — The cir parameter overrides the default administrative CIR used by the queue. When the
rate command is executed, a CIR setting is optional. When the rate command has not been
executed or the cir parameter is not explicitly specified, the default CIR (0) is assumed.
Fractional values are not allowed and must be given as a positive integer.
Values 0 — 100000000, max
Default 0