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Add

It allows you to add the one you choose from the ARP table or the

IP/MAC address typed in

Add and Edit

to the table of

IP Bind

List

.

Edit

It allows you to edit and modify the selected IP address and MAC

address that you create before.

Remove

You can remove any item listed in

IP Bind List

. Simply click and

select the one, and click

Remove

. The selected item will be

removed from the

IP Bind List

.

Note:

Before you select

Strict Bind

, you have to bind one set of IP/MAC address

for one PC. If not, no one of the PCs can access into Internet. And the web

configurator of the router might not be accessed.

3.5 Bandwidth Management

Below shows the menu items for Bandwidth Management.

3.5.1 Limit Session

When PCs with private IP addresses try to access into the Internet via NAT router, the router

will generate the record of NAT sessions for such connection. The P2P (Peer to Peer)

applications (e.g., BitTorrent) always need many sessions for procession and also they will

occupy over resources which might result in important accesses impacted. To solve the

problem, you can use limit session to limit the session procession for specified Hosts.

In the

Bandwidth Management

menu, click

Limit Session

to open the web page.

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To activate the function of limit session, simply click

Enable

and set the default session

limit.

Enable

Click this button to activate the function of limit session.

Disable

Click this button to close the function of limit session.

Default session limit

Define the default session number used for each computer in

LAN.

Limitation List

Display a list of specific limitations that you set on this web

page.

Start IP

Define the start IP address for limit session.

End IP

Define the end IP address for limit session.

Session Number

Define the available session number for specific range of IP

addresses. If you do not set the session number in this field,

the system will use the default session limit for the specific

limitation you set for each index.

Add

Add the specific session limitation onto the list above.

Edit

Allows you to edit the settings for the selected limitation.

Remove

Remove the selected settings existing on the limitation list.

Index (1-15) in Schedule

Setup

You can type in four sets of time schedule for your request.

All the schedules can be set previously in

Application –

Schedule

web page and you can use the number that you have

set in that web page.

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3.5.2 Limit Bandwidth

The downstream or upstream from FTP, HTTP or some P2P applications will occupy large

of bandwidth and affect other normal applications. You can use Limit Bandwidth to make

the bandwidth usage more efficient.

In the

Bandwidth Management

menu, click

Limit Bandwidth

to open the web page.

To activate the function of limit bandwidth, simply click

Enable

and set the default upstream

and downstream limit.

Enable

Click this button to activate the function of limit bandwidth.

Disable

Click this button to close the function of limit bandwidth.

Default TX limit

Define the default speed of the upstream for each computer in

LAN.

Default RX limit

Define the default speed of the downstream for each computer

in LAN.

Limitation List

Display a list of specific limitations that you set on this web

page.

Start IP

Define the start IP address for limit bandwidth.

End IP

Define the end IP address for limit bandwidth.

TX limit

Define the limitation for the speed of the upstream. If you do

not set the limit in this field, the system will use the default

speed for the specific limitation you set for each index.

RX limit

Define the limitation for the speed of the downstream. If you

do not set the limit in this field, the system will use the default

speed for the specific limitation you set for each index.

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Add

Add the specific speed limitation onto the list above.

Edit

Allows you to edit the settings for the selected limitation.

Remove

Remove the selected settings existing on the limitation list.

Index (1-15) in Schedule

Setup

You can type in four sets of time schedule for your request.

All the schedules can be set previously in

Application –

Schedule

web page and you can use the number that you

have set in that web page.

3.5.3 Quality of Service

Deploying QoS (Quality of Service) management to guarantee that all applications receive

the service levels required and sufficient bandwidth to meet performance expectations is

indeed one important aspect of modern enterprise network.

One reason for QoS is that numerous TCP-based applications tend to continually increase

their transmission rate and consume all available bandwidth, which is called TCP slow start.

If other applications are not protected by QoS, it will detract much from their performance in

the overcrowded network. This is especially essential to those are low tolerant of loss, delay

or jitter (delay variation).

Another reason is due to congestions at network intersections where speeds of

interconnected circuits mismatch or traffic aggregates, packets will queue up and traffic can

be throttled back to a lower speed. If there’s no defined priority to specify which packets

should be discarded (or in another term “dropped”) from an overflowing queue, packets of

sensitive applications mentioned above might be the ones to drop off. How this will affect

application performance?

There are two components within Primary configuration of QoS deployment:

z

Classification: Identifying low-latency or crucial applications and marking them for

high-priority service level enforcement throughout the network.

z

Scheduling: Based on classification of service level to assign packets to queues and

associated service types

The basic QoS implementation in Vigor routers is to classify and schedule packets based on

the service type information in the IP header. For instance, to ensure the connection with the

headquarter, a teleworker may enforce an index of QoS Control to reserve bandwidth for

HTTPS connection while using lots of application at the same time.

One more larger-scale implementation of QoS network is to apply DSCP (Differentiated

Service Code Point) and IP Precedence disciplines at Layer 3. Compared with legacy IP

Precedence that uses Type of Service (ToS) field in the IP header to define 8 service classes,

DSCP is a successor creating 64 classes possible with backward IP Precedence compatibility.

In a QoS-enabled network, or Differentiated Service (DiffServ or DS) framework, a DS

domain owner should sign a Service License Agreement (SLA) with other DS domain

owners to define the service level provided toward traffic from different domains. Then each

DS node in these domains will perform the priority treatment. This is called

per-hop-behavior (PHB). The definition of PHB includes Expedited Forwarding (EF),

Assured Forwarding (AF), and Best Effort (BE). AF defines the four classes of delivery (or

forwarding) classes and three levels of drop precedence in each class.

Vigor routers as edge routers of DS domain shall check the marked DSCP value in the IP

header of bypassing traffic, thus to allocate certain amount of resource execute appropriate

policing, classification or scheduling. The core routers in the backbone will do the same

checking before executing treatments in order to ensure service-level consistency throughout

the whole QoS-enabled network.

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However, each node may take different attitude toward packets with high priority marking

since it may bind with the business deal of SLA among different DS domain owners. It’s not

easy to achieve deterministic and consistent high-priority QoS traffic throughout the whole

network with merely Vigor router’s effort.

In the

Bandwidth Management

menu, click

Quality of Service

to open the web page.

Enable the QoS Control

The factory default for this setting is checked.

Direction

Define which traffic the QoS Control settings apply to.

IN-

apply to incoming traffic only.

OUT-

apply to outgoing traffic only.

BOTH-

apply to both incoming and outgoing traffic.

Index

The group index number of QoS Control settings. There are

total 4 groups.

Class Name

Define the name for the group index.

Reserved Bandwidth Ratio

It is reserved for the group index in the form of ratio of

reserved bandwidth to upstream speed

and

reserved

bandwidth to downstream speed

.

Setup

There are two-level of settings:

Basic -

setup Reserved Bandwidth Ratio according to the

traffic service type. We provide a list of common service

types.

Advance -

custom setting of Reserved Bandwidth Ratio based

on the source address, destination address, DiffServ

CodePoint, and service type.