Alcatel-Lucent 7210 SAS E OS Quality Of Service Manual page 129

rate
Syntax rate [cir cir-percent] [pir pir-percent]
no rate
Context config>qos>network-queue>queue
Description
This command defines the administrative Peak Information Rate (PIR) and the administrative Com-
mitted Information Rate (CIR) parameters for the queue. The PIR defines the percentage that the
queue can transmit packets through the switch fabric. 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 percentage at which the system prioritizes the queue over other queues compet-
ing for the same bandwidth. For network egress, the CIR also defines the rate that the queue is consid-
ered in-profile by the system. The in-profile and out-profile of the queue influences the scheduler
priority queue metric. The in-profile and out-profile of the queue based on CIR and PIR is never
marked in the packets. The packets at egress are considered in-profile and out-profile based on the
SAP ingress policy meter results.
The rate command can be executed at anytime, altering the PIR and CIR rates for all queues The 8
queues which are available at egress port are always associated with the network queue QoS policy by
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 (100, 0).
Parameters
cir percent — Defines the percentage of the guaranteed rate allowed for the queue. When the rate
7210 SAS-E OS Quality of Service Guide
defines the constraint used when deriving the operational PIR for the queue. When
the pir command is not specified, the default applies.
cir — Defines the constraints enforced when adapting the CIR rate defined within
the queue queue-id rate command. The cir parameter requires a qualifier that
defines the constraint used when deriving the operational CIR for the queue. When
the cir parameter is not specified, the default constraint applies.
max — The max (maximum) option is mutually exclusive with the min and closest
options. When max is defined, the operational PIR for the queue will be equal to or
less than the administrative rate specified using the rate command.
min — The min (minimum) option is mutually exclusive with the max and closest
options. When min is defined, the operational PIR for the queue will be equal to or
greater than the administrative rate specified using the rate command.
closest — The closest parameter is mutually exclusive with the min and max
parameter. When closest is defined, the operational PIR for the queue will be the
rate closest to the rate specified using the rate command.
command is executed, a valid CIR setting must be explicitly defined. When the rate command
has not been executed, the default CIR of 0 is assumed. Fractional values are not allowed and
must be given as a positive integer.
QoS Commands
Page 129