CANOGA PERKINS 9175 Command Reference - Manual (Page 578)

CanogaOS Command Reference
32-3
32.4 queue-rate
Use this command to configure queue shaping rates for the three high priority queues, i.e., queue 1 -
queue 3, in SAP egress policy. The queue shaping rate-limits the de-queue rate for each queue of an
EVC at egress UNI direction. Queue 0, the lowest priority queue, always be given the least chance to be
scheduled, is not necessary to be configured with a queue shaping rate because it is only allowed to
utilize the residual bandwidth after the high priority queues consuming the configured bandwidth.
Command Syntax
queue-rate RATE1 RATE2 RATE3
RATE1: The shaping rate of queue 1, whose value ranges from 0 to 1000, 000 kbps.
RATE2: The shaping rate of queue 2, whose value ranges from 0 to 1000, 000 kbps.
RATE3: The shaping rate of queue 3, whose value ranges from 0 to 1000, 000 kbps.
Command Mode
SAP Egress Policy Configuration
Usage
1. The sum queue-rate of queue 1 - queue 3 can not be greater than the total-rate.
2. Each queue will be assigned with a class. Queues in the highest class will be given the most chance
to be scheduled, and following down, queues in the lowest class can only use the residual bandwidth
after the queues in higher classes consuming the bandwidth.
3. In SAP egress policy, queue i is bound to class i internally. Unlike the interface queues, this
queue-class relationship is immutable and not allowed to be altered.
4. Queues in the same class will be served by WDRR (Weight Deficit Round Robin) scheduling
algorithm. And, queues in different classes will be served by SP (Strictly Priority) scheduling
algorithm.
Examples
In the following example, the queue-rate command is used to configure queue shaping rates for queue
1 to queue 3 of a EVC at egress UNI direction.
Switch(config)# qos sap-egress evc110-policy-at-egress-uni
Switch(config-sap-egress)# queue-rate 8000 4000 2000
Related Commands
None