- Allied Telesis, Inc Switches Owner's Manual

Page 14 | AlliedWare™ OS How To Note: QoS configuration

Full QoS scenario

: tiered services for a single customer

Bronze traffic is also allowed to burst up to the full egress bandwidth of the uplink port,

but when congestion occurs, will be throttled back in favour of Gold traffic, and will share the

remaining bandwidth with Silver traffic in a Weighted Round Robin fashion. The ISP makes no

guarantees at all with regard to delivery of Bronze traffic across their network; it will be

delivered on a best-effort basis.

Identify the types of traffic

The different categories of traffic will be identified by the DSCP values in the packets'

headers. It is up to the customer to mark the packets with the appropriate DSCP values.

The DSCP values belonging to the different traffic categories are:

The classifiers to match these DSCP values are:

create classifier=1 ipds=0

create classifier=2 ipds=30

create classifier=3 ipds=40

There are 3 flow groups created, and the appropriate classifiers are added to each flow

group:

create qos flowgroup=1

create qos flowgroup=2

create qos flowgroup=3

add qos flowgroup=1 classifier=1

add qos flowgroup=2 classifier=2

add qos flowgroup=3 classifier=3

Then three traffic classes are created, each containing one flow group:

create qos trafficclass=1

create qos trafficclass=2

create qos trafficclass=3

add qos trafficclass=1 flowgroup=1

add qos trafficclass=2 flowgroup=2

add qos trafficclass=3 flowgroup=3

create qos policy=1

add qos policy=1 traffic=1,2,3

set qos port=1 policy=1

This way, each category of traffic is associated with a different traffic class.

Gold 40

Silver 30

Bronze 0

X Put the different categories of trafffic into different queues