Actiontec MI424-WR-Rev-C Router Manual PDF (Setup & Configuration Guide)

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Conﬁguring Quality of Service

A.2

Trafﬁc Shaping

A

186

Diffserv defines a field in IP packet headers referred to as the Differentiated

Services Codepoint (DSCP). Hosts or routers passing traffic to a Diffserv-enabled

network will typically mark each transmitted packet with an appropriate DSCP.

The DSCP markings are used by Diffserv network routers to appropriately

classify packets and to apply particular queue handling or scheduling behavior

The FiOS Router provides a table of predefined DSCP values, which are mapped

to 802.1p priority marking method. Any of the existing DSCP setting can be

edited or deleted, and new entries can be added.

Click

1.

Quality of Service

at the top of the Home screen, then click

DSCP

Settings

. The “DSCP Settings” screen appears.

To edit an existing entry, click the appropriate icon in the “Action” column.

2.

To add a new entry, click

Add

. In either case, the “Edit DSCP Settings” screen

appears.

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FiOS Router User Manual

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187

Configure the following parameters:

3.

DSCP Value (hex)

- Enter the DSCP value as a hexadecimal value.

802.1p Priority

- Select a 802.1p priority level from the drop-down list,

zero being the lowest and seven the highest (each priority level is mapped

to low/medium/high priority). The default DSCP value for packets with an

unassigned value is zero.

Click

4.

Apply

to save the settings.

A.2e

802.1p Settings

The IEEE 802.1p priority marking method is a standard for prioritizing network

traffic at the data link/Mac sub-layer. 802.1p traffic is simply classified and sent to

the destination, with no bandwidth reservations established.

The 802.1p header includes a 3-bit prioritization field, which allows packets to

be grouped into eight levels of priority. By default, the highest priority is seven,

which might be assigned to network-critical traffic. Values five and six may be

applied to delay-sensitive applications such as interactive video and voice. Data

classes four through one range from controlled-load applications down to “loss

eligible” traffic. Zero is the value for unassigned traffic and used as a best effort

default, invoked automatically when no other value has been set.

A packet can match more than one rule. This means that:

The first class rule has precedence over all other class rules (scanning is

s

stopped once the first rule is reached).

The first traffic-priority (classless) rule has precedence over all other traffic

s

priority rules.

There is no prevention of a traffic-priority rule conflicting with a class rule. In

s

this case, the priority and DSCP setting of the class rule (if given) will

take precedence.

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Conﬁguring Quality of Service

A.2

Trafﬁc Shaping

A

188

To configure 802.1p settings:

Click

1.

Quality of Service

in the Advanced screen, then click

802.1p Settings

.

The “802.1p Settings” screen appears.

The eight 802.1p values are pre-populated with the three priority levels:

2.

Low

,

Medium

, and

High

. These levels can be changed for each of the eight values

in their respective drop-down lists.

Click

3.

Apply

to save the settings.

A.2f

Class Statistics

The FiOS Router provides accurate, real-time information on the traffic moving

through the defined device classes. For example, the amount of packets sent,

dropped, or delayed are just a few of the parameters monitored per each

shaping class.

To view class statistics, click

Quality of Service

at the top of the Home screen,

then click

Class Statistics

. The following screen appears. Note that class statistics

will only be available after defining at least one class (otherwise the screen will

not present any information).

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FiOS Router User Manual

02/11/09

189

A.2g

Class Identifier

To create a class identifier, click

Quality of Service

in the Advanced screen, then

click

Class Identifier.

The “DHCP Server Pool Settings” screen appears.

Enter the information needed in the appropriate text boxes, then click

Apply

.

Page 190 / 198

190

B

Speciﬁcations

B.0

Introduction

B.1

General

B.2

LED Indicators

B.3

Environmental

Rate

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