User guide

QOS QoS implementation for DIFFSERV

iMG/RG Software Reference Manual (Quality of Service)

7-14

7.1.3.4.6 Packet Dequeue

The packets present in various queues are selected based on the configured service discipline and transmitted

to the driver below. As an optimization measure, the Scheduler tries to utilize a low level driver queue fully by

pushing as many packets as possible (limited by the driver queue size) to the driver. The flow chart below sum-

marises the scheduling process for packet dequeuing.

FIGURE 7-5 Scheduling Process for Packet Dequeuing

7.1.3.4.7 Configuring the Scheduler

This section explains the basic steps to follow in order to configure the Scheduler.

To configure the Scheduler, use the following CLI commands:

1. Create a Scheduler profile using the command scheduler add profile {wf2qplus | priority}

Dequeue

Select a packet according to the configured service discipline,

for transmission to the driver

in which enough tokens can be

accumulated to transmit the packet

Transmit packet

to the driver

Consume number

of tokens according

to the packet size

STOP

Packet found

Perform

shaping?

Enough

tokens?