Billion BiPAC-7300GX Router Manual PDF (Setup & Configuration Guide)

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5.3.5 QoS (Quality of Service)

Quality of Service Introduction

If you’ve ever found your ‘net’ speed has slowed to a crawl because another family member

is using a P2P file sharing program, you’ll understand why the Quality of Service features in

Billion’s routers is such a breakthrough for home users and office users.

QoS: Keeping Your Net Connection Fast and Responsive

Configurable by internal IP address, external IP address, protocol, and port, the Quality of

Service (QoS) gives you full control over which types of outgoing data traffic should be

given priority by the router, ensuring bandwidth-consumption data like gaming packets,

latency-sensitive application like voice, or even mission critical files, move through the

router at lightning speed, even under heavy load. You can throttle the speed at which

different types of outgoing data pass through the router. In addition, you can simply change

the priority of different types of upload data and let the router sort out the actual speeds.

QoS Setup

Please choose the

QoS

in the

Configuration

item of the left window as depicted below.

After clicking the QoS item, you can Add/Edit/Delete a QoS policy. This page will show the

brief information for policies you have added or edited. This page will also display the total

available (Non-assigned) bandwidth, in percentage, can be assigned.

Application

: A name that identifies an existing policy.

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Direction

: The traffic flow direction to be controlled by the QoS policy.

There are two settings to be provided in the Router:

~

LAN to WAN:

You want to control the traffic flow from the local network to the outside

world. e.g., you have a FTP server inside the local network and you want to have a limited

traffic rate controlled by the QoS policy. So, you need to add a policy with LAN to WAN

direction setting.

~

WAN to LAN

: Control Traffic flow from the WAN to LAN. The connection maybe either

issued from LAN to WAN or WAN to LAN.)

Protocol

: The Protocol will be controlled. For GRE protocol, there is no need to specify

the IP addresses or Application ports in this page. For other protocols, at least one value

shall be given.

~

ANY:

No protocol type is specified.

~

TCP

~

UDP

~

ICMP

~

GRE:

For PPTP VPN Connections.

DSCP Marking

: Differentiated Services Code Point (DSCP), it is the first 6 bits in the

ToS byte. DSCP Marking allows users to classify traffic based on DSCP value and send

packets to next Router.

Note:

To be sure the router(s) in the backbones network have the capability in executing and

checking the DSCP through-out the QoS network.

DSCP Mapping Table

Best Effort

Best Effort (000000)

Gold service (L)

Class 1, Gold (001010)

Gold service (H)

Class 1, Bronze (001110)

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Silver service (M)

Class 2, Silver (010100)

Bronze service (L)

Class 3, Gold (011010)

Bronze service (H)

Class 3, Bronze (011110)

Rate Type

: 2 types are provided:

~

Limited (Maximum):

specify a limited data rate for this policy. It also is the maximal

rate for this policy. As above FTP server example, you may want to “throttle” the outgoing

FTP speed to 20% of 256K and limit to it, you may use this type.

~

Guaranteed (Minimum):

specify a minimal data rate for this policy. For example,

you want to provide a guaranteed data rate for your outside customers to access your

internal FTP server with, say at least, 20% of your total bandwidth. You can use this type.

Then, if there is available bandwidth that is not used, it will be given to this policy by

following priority assignment.

Ratio:

Assign the data ratio for this policy to be controlled.

For examples, we want to

only allow 20% of the total data transfer rate for the LAN-to-WAN direction to be used for

FTP server. Then we can specify here with data ratio = 20. If you have ADSL LINE with

256K/bps.rate, the estimated data rate, in kbps, for this rule is 20%*256*0.9 = 46kbps.

(For 0.9 is an estimated factor for the effective data transfer rate for a ADSL LINE from LAN

to WAN. For WAN-to-LAN, it is 0.85 to 0.8).

Priority:

Specify the priority for the bandwidth that is not used. For examples, you may

specify two different QoS policies for different applications. Both applications need a

minimal bandwidth and need more bandwidth, beside the assigned one, if there is any

available/non-used one available. So, you may specify which application can have higher

priority to acquire the non-used bandwidth.

~

High

~

Normal

: The default is normal priority.

~

Low

For the sample priority assignment for different policies, it is served in a First-In-First-Out

way.

Internal IP Address:

The IP address values for Local LAN machines you want to

control. (For IP packets from LAN to WAN, it is the source IP address. For IP packages from

WAN to LAN, it is the destination IP address.)

Internal Port:

The Application port values for local LAN machines you want to control.

(For TCP/UDP packets from LAN to WAN, it is the source port value. For TCP/UDP packets

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from WAN to LAN, it is the destination port value.)

External IP Address:

The IP address values for Remote WAN machines you want to

control. (For IP packets from LAN to WAN, it is the destination IP address. For IP packages

from WAN to LAN, it is the source IP address.)

External Ports:

The Application port values for remote machines you want to control.

(For TCP/UDP packets from LAN to WAN, it is the destination port value. For TCP/UDP

packets from WAN to LAN, it is the source port value.)

Time Schedule:

Scheduling your prioritization policy.

QoS example for your Network

Connection Diagram

ADSL Subscription Rate

Upstream: 256 kbps

Downstream: 2048 Mbps

Example QoS Plan

Application IP or Ports

Control Flow

Data Rate

Time Schedule

VoIP User

192.168.0.1

Outgoing

Minimal 20% with high priority

for non-used bandwidth with

Always

HTTP web

browsing users

Restricted PC

Normal PCs

VoIP

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DSCP marking Class 1 Gold

Service.

FTP Sever

192.168.0.100 Incoming

and

Outgoing

outgoing :minimal 30%. Data

rate.

incoming :minimal 30%. Data

rate.

Both with low priority for

non-used bandwidth.

Only

Working

Hours 9:00 to

17:00 Monday

to Friday.

HTTP web

browsing

users

80

Incoming

and

Outgoing

outgoing : limited 20%. Data

rate.

incoming : limited 30%. Data

rate.

Always

Example QoS Setup

VoIP application

Voice is latency-sensitive application. Most VoIP devices are used SIP protocol and the port

number will be assigned by SIP module automatically. Better to use fixed IP address for

catching VoIP packets as high priority.

Rate

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