C
HAPTER
35
| Class of Service Commands
Priority Commands (Layer 2)
– 819 –
preserving the overall weight ratios between the queues. This produces
less jitter and lower maximum latency for traffic on all of the serviced
queues.
â—† If Strict and SDWRR mode is selected, a combination of strict service is
used for the high priority queues and weighted service for the
remaining queues. The queues assigned to use strict priority should be
specified using the Strict Mode field parameter.
â—† A weight can be assigned to each of the weighted queues (and thereby
to the corresponding traffic priorities). This weight sets the frequency
at which each queue is polled for service, and subsequently affects the
response time for software applications assigned a specific priority
value.
â—† Service time is shared at the egress ports by defining scheduling
weights for SWDRR, or for the queuing mode that uses a combination
of strict and weighted queuing. Service time is allocated to each queue
by calculating a precise number of bytes per second that will be
serviced on each round.
EXAMPLE
The following example sets the queue mode to strict priority service mode:
Console(config)#queue mode strict
Console(config)#
RELATED COMMANDS
queue weight (819)
show queue mode (821)
queue weight This command assigns weights to the four class of service (CoS) priority
queues when using weighted queuing, or one of the queuing modes that
use a combination of strict and weighted queuing. Use the no form to
restore the default weights.
SYNTAX
queue weight weight0...weight3
no queue weight
weight0...weight3 - The ratio of weights for queues 0 - 3
determines the weights used by the SWDRR scheduler.
(Range: 1-255)
DEFAULT SETTING
Weights 1, 2, 4, 6 are assigned to queues 0 - 3 respectively.
COMMAND MODE
Global Configuration
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