5 - Information / Configuration

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5.7.8

Quality of Service

This menu contains 2 sub-menus:

•

Queue Config (see subsection 5.7.8.1),

•

QoS Classification (see subsection 5.7.8.2).

Object:

This menu is used to allocate different types of traffic queues with different priorities in

order to improve the traffic flow. To do this, the quality of service (QoS) provides the

following three services: Classification (set-1, set-2), Marking (TOS, DSCP) and

queues (Queuing).

The quality of service is only significant if all the traffic (data, video) is greater than the

up rate of the ADSL line.

•

In the

Advanced Setup

menu, select

Quality of Service

.

The following screen opens:

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Field

Action

Enable QoS

Check the

Enable QoS

box to authorize QoS actions to be performed

at the ingress and egress interfaces.

Select Default

DSCP Mark

The IP datagram DSCP (

D

ifferentiated

S

ervices

C

ode

P

oint, priority

value from 0 to 63) identifies which output queue a packet is to be

assigned to.

Default DSCP Mark

is used to mark the priority of the packets when

they are not tagged in the computer. In this case the router will do it

with the values indicated.

Select from the scroll down list:

No Change (-1):

Value of –1 indicates no change from the incoming

packet,

Auto Marking (-2)

Default (000000) : Marks everything else to DSCP 0,

AF13 (001110)

AF12 (001100)

: Recommended markings for Bulk-Data,

AF11 (001010)

: Recommended markings for Bulk-Data,

CS1 (001000)

: Recommended markings for Scavenger traffic,

AF23 (010110)

AF22 (010100)

: Recommended markings for Transactional-Data,

AF21 (010010)

: Recommended markings for Transactional-Data,

CS2 (010000)

: Recommended markings for Network Management,

AF33 (011110)

AF32 (011100)

: Recommended markings for Mission-Critical Data,

AF31 (011010)

: Recommended markings for Mission-Critical Data,

CS3 (011000)

: Call-Signalling markings,

AF43 (100110)

AF42 (100100)

: Recommended markings for IP/VC,

AF41 (100010)

: Recommended markings for IP/VC,

CS4 (100000)

: Recommended markings for Streaming-Video,

EF (101110)

: IP Phones mark Voice to EF,

CS5 (101000)

CS6 (11000)

: Routers mark Routing traffic to CS6,

CS7 (111000)

Note:

This drop-down list is present only if the box

Enable Qos

is

checked.

5 - Information / Configuration

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5.7.8.1

Queue Config

Object:

This menu is used to enable or disable QoS on an interface, and to configure QoS to

use policy maps attached to an interface.

•

In the

Advanced Setup

menu, select

Quality of Service

then select

Queue Config

.

The following screen opens:

Field

State

Name

Queue entry name

Key

Sequence number allocated by the system, incremented of a

unit to each addition of a QoS Queue.

Interface

Name of the network interface configured (8/35 for example).

Precedence

Priority allocated to "Queue Precedence" from 1 to 3.

DSL Latency

DSL Latency

PTM Priority

PTM priority

Enable

QoS enabled or disabled for this interface.

Note:

This status can be amended starting from this window.

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Add

•

Click on the

Add

button to display the following screen:

Field

Action

Name

Enter a representative name.

Enable

Select from the scroll down list:

•

Disable

: To disable the QoS queue entry

•

Enable

: To enable the QoS queue entry

Interface

Select from the scroll down list:

•

Blank

•

8/35

: Interface name.

Queue Precedence

Select from the scroll down list:

•

Blank

•

1

: High priority for this queue,

•

2

: Medium priority for this queue,

•

3

: Low priority for this queue.

Note:

A high priority leads to low packet loss.

5 - Information / Configuration

Page 5-64

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5.7.8.2

QoS Classification

Object:

This menu is used for the classification of packets into traffic classes, and for the

enforcement of policies using queuing.

•

In the

Advanced Setup

menu, select

Quality of Service

then select

QoS Classification

.

The following screen opens: