Queue weight – Microsens MS453490M Management Guide User Manual

Page 819

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C

HAPTER

35

| Class of Service Commands

Priority Commands (Layer 2)

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preserving the overall weight ratios between the queues. This produces

less jitter and lower maximum latency for traffic on all of the serviced

queues.

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.

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.

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.

E

XAMPLE

The following example sets the queue mode to strict priority service mode:

Console(config)#queue mode strict

Console(config)#

R

ELATED

C

OMMANDS

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.

S

YNTAX

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)

D

EFAULT

S

ETTING

Weights 1, 2, 4, 6 are assigned to queues 0 - 3 respectively.

C

OMMAND

M

ODE

Global Configuration

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