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

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Conﬁguring Quality of Service

A.1

Trafﬁc Priority

A

176

STOP!

Do not change any Quality of Service settings unless instructed to do so

by the ISP.

A.1

Traffic Priority

Traffic Priority manages and avoid traffic congestion by defining inbound

and outbound priority rules for each device on the FiOS Router. These rules

determine the priority that packets, traveling through the device, will receive.

QoS parameters (DSCP marking and packet priority) are set per packet, on an

application basis.

QoS can be configured using flexible rules, according to the following

parameters:

Source/destination IP address, MAC address, or host name

s

Device

s

Source/destination ports

s

Limit the rule for specific days and hours

s

The FiOS Router supports two priority marking methods for packet prioritization:

DSCP

s

802.1p Priority

s

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177

The matching of packets by rules is connection-based, known as Stateful

Packet Inspection (SPI), using the FiOS Router’s firewall mechanism. Once a

packet matches a rule, all subsequent packets with the same attributes receive

the same QoS parameters, both inbound and outbound. Connection-based

QoS also allows inheriting QoS parameters by some of the applications that

open subsequent connections. For instance, QoS rules can be defined on SIP,

and the rules will apply to both control and data ports (even if the data ports

are unknown). Applications that support such inheritance have an ALG in the

firewall. They are:

SIP

s

MSN Messenger/Windows Messenger

s

TFTP

s

FTP

s

MGCP

s

H.323

s

Port triggering applications

s

PPTP

s

IPSec

s

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Conﬁguring Quality of Service

A.1

Trafﬁc Priority

A

178

A.1a

Setting Priority Rules

To set priority rules:

Click

1.

Quality of Service

in the Advanced screen. The “Traffic Priority” screen

appears. This screen is divided into two identical sections, one for “QoS input

rules” and the other for “QoS output rules,” which are for prioritizing the

inbound and outbound traffic, respectively. Each section lists all the devices

on which rules can be set. Rules can be set on all devices at once by clicking

Add

in the “All Devices” row.

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179

After choosing the traffic direction and the device on which to set the

2.

rule, click

Add

in the appropriate row. The “Add Traffic Priority Rule”

screen appears.

Set the following seven parameters:

Source Address

The source address of the packets sent to or received from the network object.

To add an address:

Select “

1.

Specify Address” from the drop-down list. The screen refreshes and an

“Add” link appears.

Click

2.

Add

, then add a new network object (see the “Advanced Settings”

chapter to learn how to add a network object). Clicking Add is the same as

clicking New Entry in the Network Objects screen.

Destination Address

The destination address of the packets sent to or received from the network

object. This address can be configured in the same manner as the source address.

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Conﬁguring Quality of Service

A.1

Trafﬁc Priority

A

180

Protocol

Choose a specific traffic protocol from the drop-down list, or add a new one. To

add a new traffic protocol:

Select

1.

Specify Address

from the drop-down list. The screen refreshes and an

“Add” link appears.

Click

2.

Add

, and add a new protocol (see the “Advanced Settings” chapter to

learn how to add a protocol). Note that clicking Add is equivalent to clicking

New Entry in the Protocols screen.

Set Priority

Activate this check box to add a priority to the rule. The screen will refresh,

allowing a selection between one of eight priority levels, zero being the lowest

and seven the highest (each priority level is mapped to low/medium/high

priority). This sets the priority of a packet on the connection matching the rule,

while routing the packet.

DSCP

Activate this check box to mark a DSCP value on packets matching a connection

that matches this rule. The screen will refresh, allowing the user to enter the Hex

value of the DSCP.

Log Packets Matched by This Rule

Check this check box to log the first packet from a connection matched by

this rule.

When should this rule occur?

By default, the rule will always be active. However, scheduler rules can be

configured to define time segments during which the rule may be active.

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