SMC Networks TigerSwitch, Management Manual

Page: 465 / 518

P
RIORITY
C
OMMANDS
4-223
queue mode
This command sets the queue mode to strict priority or Weighted
Round-Robin (WRR) for the class of service (CoS) priority queues. Use the
no form to restore the default value.
Syntax
queue mode { strict | wrr }
no queue mode
• strict - Services the egress queues in sequential order, transmitting
all traffic in the higher priority queues before servicing lower
priority queues.
• wrr - Weighted Round-Robin shares bandwidth at the egress ports
by using scheduling weights 1, 2, 4, 6 for queues 0 - 3 respectively.
Default Setting
Weighted Round Robin
Command Mode
Global Configuration
Command Usage
You can set the switch to service the queues based on a strict rule that
requires all traffic in a higher priority queue to be processed before
lower priority queues are serviced, or use Weighted Round-Robin
(WRR) queuing that specifies a relative weight of each queue. WRR
uses a predefined relative weight for each queue that determines the
percentage of service time the switch services each queue before
moving on to the next queue. This prevents the head-of-line blocking
that can occur with strict priority queuing.
show queue
cos-map Shows the class-of-service map PE 4-228
show interfaces
switchport Displays the administrative and operational
status of an interface PE 4-157
Table 4-58 Priority Commands (Layer 2)
Command Function Mode Page