Alcatel-Lucent 7450 Quality Of Service Manual page 365

cir-level cir-level — Defines the port priority the queue or scheduler will use to receive
rate
Syntax rate pir-rate [cir cir-rate | police]
no rate
Context config>qos>sap-ingress>queue
Description
This command defines the administrative Peak Information Rate (PIR) and the administrative
Committed Information Rate (CIR) parameters for the queue. The PIR defines the maximum rate that
the queue can transmit packets through the switch fabric (for SAP ingress 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. For SAP ingress, the CIR also defines the rate that packets are considered in-profile
by the system. In-profile then out-of-profile packets are preferentially queued by the system at egress
and at subsequent next hop nodes where the packet can traverse. To be properly handled 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 ingress or 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).
Parameters rate max cir 0 — The max default specifies the amount of bandwidth in kilobits per second
pir-rate — Defines the administrative PIR rate, in kilobits, for the queue. When the rate command
Quality of Service Guide
bandwidth for its within-cir offered-load. If the cir-weight parameter is set to a value of 0 (the
default value), the queue or scheduler does not receive bandwidth during the port schedulers
within-cir pass and the cir-level parameter is ignored. If the cir-weight parameter is 1 or
greater, the cir-level parameter comes into play.
Values
0 to 8 (8 is the highest priority)
Default 0
(thousand bits per second). The max value is mutually exclusive to the pir-rate value.
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.
Service Egress and Ingress QoS Policies
365