HotBrick LB-2 User Manual

HotBrick Network Solutions

Load Balancer LB-2

User’s Guide

HotBrick Network Solutions

	HotBrick Network Solutions
	TABLE OF CONTENTS
1: INTRODUCTION ..............................................................................................................................	1
Internet Features ..........................................................................................................................	1
Other Features ..............................................................................................................................	3
Package Contents ........................................................................................................................	4
Physical Details ............................................................................................................................	4
2: BASIC SETUP..................................................................................................................................	8
Overview........................................................................................................................................	8
Procedure......................................................................................................................................	8
3: ADVANCED PORT SETUP............................................................................................................	19
Overview......................................................................................................................................	19
Port Options................................................................................................................................	19
Load Balance ..............................................................................................................................	21
Advanced PPPoE........................................................................................................................	23
Advanced PPTP ..........................................................................................................................	24
4: ADVANCED SETUP.......................................................................................................................	25
Overview......................................................................................................................................	25
Host IP Setup ..............................................................................................................................	25
Virtual Server ..............................................................................................................................	28
Custom Virtual Server................................................................................................................	30
Special Application ....................................................................................................................	32
Dynamic DNS ..............................................................................................................................	34
Multi DMZ ....................................................................................................................................	36
UPnP ............................................................................................................................................	38
Advanced Features ....................................................................................................................	39
5: SECURITY MANAGEMENT ……………………………………………………………………………..42
Block URL ...................................................................................................................................	42
Access Filter ...............................................................................................................................	44
Session Limit ..............................................................................................................................	46
Firewall Exception ……………………………………………………………………………….…… 47
6: QOS CONFIGURATION ………………………………………………………………………………….48
Overview ………………………………………………………………………………………………...48
QoS Setup ...................................................................................................................................	48
Policy Configuration...................................................................................................................	49
7: MANAGEMENT ASSISTANT ........................................................................................................	51
Overview......................................................................................................................................	51
SNMP ...........................................................................................................................................	51
Email Alert...................................................................................................................................	52
Syslog..........................................................................................................................................	54
Admin Password ........................................................................................................................	56
Upgrade Firmware ......................................................................................................................	57
8: ADVANCED LAN CONFIGURATION ………………………………………………………………...58
Overview......................................................................................................................................	58
Existing DHCP Server ………………………………………………………………………………...58
Routing ........................................................................................................................................	58

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9: OPERATION AND STATUS .........................................................................................................	61
Operation.....................................................................................................................................	61
System Status.............................................................................................................................	61
WAN Status .................................................................................................................................	64
NAT Status ..................................................................................................................................	65
APPENDIX A SPECIFICATIONS .......................................................................................................	67
APPENDIX B WINDOWS TCP/IP SETUP .........................................................................................	68
Overview......................................................................................................................................	68
TCP/IP Settings...........................................................................................................................	68
APPENDIX C TROUBLESHOOTING.................................................................................................	74
Overview......................................................................................................................................	74
General Problems.......................................................................................................................	74
Internet Access...........................................................................................................................	74

Copyright 2004. All Rights Reserved. Document Version: 1.3

All trademarks and trade names are the properties of their respective owners.

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1: Introduction

Congratulations on the purchase of your new HotBrick Load Balancer LB-2. The Load Balancer provides Shared Broadband Internet Access for all LAN users.

Figure 1: LB-2

Internet Features

•Shared Broadband Internet Access

All LAN users can access the Internet through the Load Balancer LB-2, by sharing one (1) or two

(2) Broadband modems and connections.

•High-Performance Dual Modem Support

The Load Balancer LB-2 has two (2) WAN ports, allowing connection of two (2) Broadband modems.

This gives twice the bandwidth of a single modem.

Flexible configuration allows each port to use a different type of modem and connection method. Also, you can determine how the Internet traffic is shared between the 2 modems.

•Supports all common Connection Methods

All popular DSL and Cable Modems and connection methods are supported, including Fixed IP, Dynamic IP, PPPoE, and PPTP.

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•PPPoE Session Management

Multiple PPPoE sessions are supported and you can choose to “map” sessions to individual PCs if desired.

•Multiple IP Address Support

If your ISP allocates you multiple IP addresses, these are also supported and you can “map” IP addresses to individual PCs if desired.

•Special Applications

This feature allows you to use some non-standard applications, where the port number used for the response is different to the port number used by the sender.

•Virtual Servers

This feature allows Internet users to access Internet servers on your LAN. For standard servers such as Web, FTP or E-Mail servers, only the IP address of the server PC is required. You can also define you own Server types if required.

•Multiple DMZ

A "DMZ" PC will receive incoming connection requests, which would otherwise be blocked. For each IP address allocated by your ISP, a separate "DMZ" PC can be specified. So if your ISP has given you multiple IP addresses, you can have multiple “DMZ” PCs. Each “DMZ” PC has unrestricted 2-way Internet access, providing the ability to run programs that are otherwise incompatible with NAT routers like the Load Balancer.

•Access Filter

The network Administrator can use the Access Filter to gain fine control over the Internet access and applications available to LAN users. Five (5) user groups are available, and each group can have different access rights.

•Block URL

Use this feature to block access to undesirable Web sites by LAN users. You can even have different settings for different groups of PCs.

•Session Limit

With Session Limit feature, if the numbers of new sessions for system exceed the maximum in the sampling time, any new session in the system will be drop.

•Firewall Exception

With firewall exception, the packets will not be processed by firewall or NAT module, but be processed directly by system protocol stack.

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Other Features

•4-Port Switching Hub

The Load Balancer LB-2 incorporates a 4-port 10 /100BaseT switching hub, making it easy to create or extend your LAN.

•DHCP Server Support

Dynamic Host Configuration Protocol provides a dynamic IP address to PCs and other devices upon request. The Load Balancer LB-2 can act as a DHCP Server for devices on your local LAN.

•Multi Segment LAN Support

LANs containing one or more segments are supported, via the Load Balancer's built-in static routing table.

•ARP proxy

The ARP proxy feature allows you to assign an external (Internet) IP address to the Load Balancer's LB-2 LAN port. This allows Servers on your LAN to have external (Internet) IP addresses.

•Easy Setup

Use your favorite WEB browser for configuration.

•Remote Management

The Load Balancer LB-2 can be managed from any PC on your LAN. And, if the Internet connection exists, it can also (optionally) be configured via the Internet.

•Password - protected Configuration

Optional password protection is provided to prevent unauthorized users from modifying the configuration data and settings.

•HTTP Firmware Upgrade and backup

The web management feature allows you to use HTTP upgrade new firmware and backup system configuration from local or even from remote site. As long as you enable “Remote upgrade” and “Remote web-based setup” from Advanced feature web page.

•Email Alert

It will send a warning email to the system administrator, if one of the WAN ports was disconnected when both WAN ports are enabled.

•Syslog

It can generate real time system information on the web page or a particular machine. It is useful to monitor the device.

•QoS Configuration.

This function will make some specified packets with higher priority for pass-through. Especially you use real-time applications like Internet phone, video conference, etc.

•UPnP

To “Enable” UpnP (Universal Plug & Play), the load balancer will become one of the network devices. It is useful to discovery and control network devices, such as Internet gateway.

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Package Contents

The following items should be included:

•The Load Balancer LB-2 Unit

•Power Adapter

•Quick Installation Guide

•CD-ROM containing the on-line manual.

If any of the above items are damaged or missing, please contact your dealer immediately.

Physical Details

Front Panel

Operation of the Front Panel LEDs is as follows:

LAN

LINK/ACT ON – Physical connection or data in/out. OFF – No physical connection.

10M/100M ON – The corresponding LAN port is using 100BaseT.

OFF – 10BaseT connection on the corresponding LAN port or no connection.

WAN

LINK/ACT ON – Physical connection to the Broadband modem on WAN port 1/2 established. OFF – No physical connection on WAN port 1/2.

10M/100M ON – Physical connection using 100BaseT on WAN port 1/2 established. OFF – 10BaseT connection or no connection on WAN port 1/2.

System

Power OFF – No power.

ON – Normal Operation Status OFF – Normal operation.

ON – Firmware not loaded or Hardware error. Blinking – Data in/out

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Also, some Status and Error conditions are indicated by combinations of LEDs, as shown below

LED Action	Condition
WAN1 LINK/ACT & 10M/100M LEDs flash alternatively.	Firmware Download in progress.
WAN1 LINK/ACT & 10M/100M LEDs flash concurrently.	MAC address not assigned.
WAN1 LINK/ACT & 10M/100M LEDs solid On	SDRAM error
WAN2 LINK/ACT & 10M/100M LEDs solid On	Timer/Interrupt error
LAN1 LINK/ACT & 10M/100M LEDs solid On	LAN/WAN error

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Rear Panel Load Balancer LB-2

	Figure 2: Rear Panel LB-2
DC 5V	Connect the supplied power adapter here.
WAN 2	Connect the 2nd Broadband Modem here, if available.
Reset Button	When pressed and released, the Load Balancer will reboot (restart) within 1
	second. It resets to default over 3 seconds.
LAN Ports	Connect the PCs to these ports. Both 10BaseT and 100BaseT connections can
	be used simultaneously.
	Note:
	Any port will automatically operate as an "Uplink" port if required. Just use a
	normal LAN cable to connect to a normal port on another hub.
WAN 1	Connect the primary Broadband Modem here.

Default Settings

When the Load Balancer LB-2 has finished booting, all configuration settings will be set to the factory defaults, including:

•IP Address set to its default value of 192.168.1.1, with a Network Mask of 255.255.255.0

•DHCP Server is enabled

•User Name: admin

•Password cleared (no password)

TFTP Download

This setting should be used only if your Load Balancer is unusable, and you wish to restore it by downloading new firmware. Follow this procedure:

1.Power On the Load Balancer LB-2.

2.Use the supplied Windows utility or a TFTP client program applies the new firmware. If using the supplied Windows TFTP program, the screen will look like the following example.

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Figure 3: Windows TFTP utility LB-2

•Enter the name of the firmware upgrade file on your PC, or click the "Browse" button to locate the file.

•Enter the LAN IP address of the Load Balancer LB-2 in the "Server IP" field.

•Click "Download" to send the file to the Load Balancer LB-2.

3.When downloading is finished. It should then work normally, using the default settings.

Note:

The supplied Windows TFTP utility also allows you to perform three (3) other operations:

•Save the current configuration settings to your PC (use the "Upload" button).

•Restore a previously-saved configuration file to the Load Balancer LB-2 (use the "Download" button).

•Set the Load Balancer LB-2 to its default values (use the "Set to Default" button).

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2: Basic Setup

Overview

Basic Setup of your HotBrick Load Balancer LB-2 involves the following steps:

1.Attach the HotBrick Load Balancer LB-2 to one (1) PC, and configure it for your LAN.

2.Install your HotBrick Load Balancer LB-2 in your LAN, and connect the Broadband Modem or Modems.

3.Configure your HotBrick Load Balancer LB-2 for Internet Access.

4.Configure PCs on your LAN to use the Load Balancer.

Requirements

•One (1) or two (2) DSL or Cable modems, each with an Internet Access account with an ISP.

•Network cables. Use standard 10/100BaseT network (UTP) cables with RJ45 connectors

•TCP/IP network protocol must be installed on all PCs.

Procedure

1: Configuring the Load Balancer LB-2 for your LAN

1.Use a standard LAN cable to connect your PC to any Hub port on the Load Balancer.

2.Connect the power adapter and power up the Load Balancer LB-2. Only use the power adapter provided; using a different one may cause hardware damage.

3.Start your PC. If your PC is already running, restart it. It will then obtain an IP address from the Load Balancer LB-2.

4.Start your WEB browser.

5.In the Address or Location box enter:

HTTP://192.168.1.1

6. You will be prompted for the User Name and password, as shown below.

Figure 4: Password Dialog

7. Enter admin for the "User Name" and leave the "Password" blank.

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•The "User Name" is always admin

•You can and should set a password, using the following Admin Password screen.

No Response ?

•Is your PC using a Fixed IP address ?

If so, you must configure your PC to use an IP address within the range 192.168.1.2 to 192.168.1.254, with a Network Mask of 255.255.255.0. See Appendix B – Windows TCP/IP Setup for details.

•Check that the Load Balancer LB-2 is properly installed, LAN connection is OK, and it is powered ON.

8.After the login, you will then see the Admin Password screen, as shown below. Assign a password by entering it in the "Password" and "Verify Fields.

Figure 5: Home Screen (Admin Password) LB-2

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Figure 6: LAN & DHCP

10.Ensure these settings are suitable for your LAN:

•The default settings are suitable for many situations.

•See the following table for details of each setting.

11.Save your data, then go to Step 2, Installing the Load Balancer LB-2 in your LAN.

Settings – LAN & DHCP

IP Address	IP address for the Load Balancer LB-2, as seen from the local LAN. Use the
	default value unless the address is already in use or your LAN is using a
	different IP address range. In the latter case, enter an unused IP Address
	from within the range used by your LAN.
Subnet Mask	The default value 255.255.255.0 is standard for small (class "C") networks.
	For other networks, use the Subnet Mask for the LAN segment to which the
	Load Balancer LB-2 is attached (the same value as the PCs on that LAN
	segment).
DHCP Server	• DHCP Server Setup - If Enabled, the Load Balancer LB-2 will allocate IP
Configuration	Addresses to PCs (DHCP clients) on your LAN when they start up. The
	default and recommended value is "Enable". (Windows systems, by

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	default, act as DHCP clients. This setting is called Obtain an IP address
	automatically.)
	• DHCP Server Setup - If you are already using a DHCP Server, the
	DHCP Server setting must be Disabled, and the existing DHCP server
	must be set to provide the IP address of the Load Balancer LB-2 as the
	Default Gateway.
	• Client Lease Time – It is a finite period of time for a DHCP server lease
	an IP address to a client..
	• Client Default DNS – An IP address of the default DNS server for the
	client requesting DHCP service.
DHCP IP Address	• Offered Range fields set the values used by the DHCP server when
Range	allocating IP Addresses to DHCP clients. This range also determines the
	number of DHCP clients supported.
	• Free Entries indicates how many DHCP entries are not currently
	allocated, and still available.
ARP Proxy	Enable this ONLY if the LAN port has an IP address in the same address
	range as the WAN port(s). This means that all PCs using this Gateway must
	have valid fixed external (Internet) IP addresses.
	If enabled, enter the IP address range used on your LAN.

DHCP Client List This table shows the IP addresses which have been allocated by the DHCP Server function. For each address which has been allocated, the following information is shown.

•Name – The "hostname" of the PC. In some cases, this may not be known.

•MAC Address – The physical address (network adapter address) of the PC.

•IP Address – The IP address allocated to this PC.

•Type – Indicates IP address to be dynamic or static.

•Status – If Dynamic, the IP address was allocated by this DHCP Server. If Sniffed, the IP address was detected by examining the LAN, rather than allocated by the DHCP Server. In this case, the Name is usually not known.

•Time Left – The time expired since which IP address is leased.

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2. Installing the HotBrick Load Balancer LB-2 in your LAN

Figure 7: Installation Diagram LB-2

1.Ensure the HotBrick Load Balancer LB-2 and the DSL/Cable modem are powered OFF. Leave the modem or modems connected to their data line.

2.Connect the Broadband modem or modems to the Load Balancer LB-2.

•If using only one (1) Broadband modem, connect it to the "WAN 1" port.

•Use the cable supplied with your DSL/Cable modem. If no cable was supplied, use a standard cable.

3.Use standard LAN cables to connect PCs to the Switching Hub ports on the Load Balancer.

•Both 10BaseT and 100BaseT connections can be used simultaneously.

•If you need to connect the Load Balancer LB-2 to another Hub, just use a standard LAN cable to connect any port on the Load Balancer LB-2 to a standard port on another hub. Any LAN port on the Load Balancer LB-2 will automatically act as an "Uplink" port when required.

4.Power Up

•Power on the Cable or DSL modem or modems.

•Connect the supplied power adapter to the Load Balancer LB-2 and power up.

5.Check the LEDs

•The Power LED should be ON.

•The WAN – Link LED should be ON, if the corresponding WAN port is connected to a broadband modem.

•The Error LED will flash during start up, but will then turn off. If it stays on, there is an error condition.

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•For each PC connected to the LAN ports, the corresponding LAN LED (either 10 or 100) should be ON.

3.Configuring the HotBrick Load Balancer LB-2 for Internet Access

Select Primary Setup from the menu, to see a screen like the example below.

•Configure WAN 1 and/or WAN 2 as required.

•For any of the following situations, refer to Chapter 3: Advanced Port Setup for any further configuration, which may be required.

•Using both ports

•Multiple IP addresses on either port

•Multiple PPPoE sessions

•PPTP connection method

Figure 8: Primary Setup Screen LB-2

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Settings – Primary Setup

Connection	Select the appropriate setting:
Mode	• Enable – Select this if you have connected a broadband modem to this
	port.
	• Disable – Select this if there is no broadband modem connected to this
	port.
	• Backup – Use this if you have a broadband modem on each port, and wish
	to normally use only one. Select Enable for the primary port, and Backup
	for the secondary port. The Backup port will only be used if the primary port
	fails.
Connection	Check the data supplied by your ISP, and select the appropriate option.
Type	• Static IP – Select this if your ISP has provided a Fixed or Static IP
	address. Then enter the data into the Address Info fields.
	• Dynamic IP – Select this if your ISP provides an IP address automatically,
	when you connect. You can ignore the Address Info fields.
	• PPPoE – Select this if your ISP uses this method. (Usually, your ISP will
	provide some PPPoE software. This software is no longer required, and
	should not be used.)
	If this method is selected, you must complete the PPPoE dialup fields.
	Note:
	If using the PPTP connection method, select Static IP or Dynamic IP, as
	appropriate, according to the IP address method used by your ISP.
Address Info	This is for Static IP users only. Enter the address information provided by your
	ISP. If your ISP provided multiple IP address, you can use the Multi-DMZ
	screen to assign the additional IP addresses.
PPPoE / PPTP	This is for PPPoE and PPTP users only.
Dialup	• Enter the Username and Password provided by your ISP.
	• If using PPTP, enable the PPTP Connection checkbox, and enter the IP
	address of the PPTP server.
	• Host name (Optional For PPPoE),This field is used by a Host to uniquely
	associate an access concentrator to a particular Host request.
	Note:
	There are additional PPPoE/PPTP options on the Port Options screen.
	To use multiple PPPoE sessions on either port, configure the Advanced
	PPPoE screen.
DNS	If using a Fixed IP address, you MUST enter at least 1 DNS address.
	If using Dynamic IP or PPPoE, DNS information is optional.

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Optional	• Host name – This is required by some ISPs. If your ISP provided a Host
	Name, enter it here. Otherwise, you can use the default value.
	• Domain name – This is required by some ISPs. If your ISP provided a
	Domain Name, enter it here. Otherwise, you can use the default value.
	• MAC address – Some ISP's record your MAC address (also called
	"Physical address" or "Network Adapter address"). If so, you can enter the
	MAC address expected by your ISP in this field. Otherwise, this should be
	left at the default value.

Setup of the HotBrick Load Balancer LB-2 is now complete. PCs on your LAN must now be configured. See the following section for details.

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4: Configure PCs on your LAN

Overview

For each PC, the following may need to be configured:

•TCP/IP network settings

•Internet Access configuration

TCP/IP Settings

If using the default Load Balancer LB-2 settings, and the default Windows 95/98/ME/2000/XP TCP/IP settings, no changes need to be made. Just start (or restart) your PC.

•By default, the Load Balancer LB-2 will act as a DHCP Server, automatically providing a suitable IP Address (and related information) to each PC when the PC boots.

•For all non-Server versions of Windows, the default TCP/IP setting is to act as a DHCP client. In Windows, this is called Obtain an IP address automatically.

Just start (or restart) your PC and it will obtain an IP address from the Load Balancer LB-2.

•If using fixed IP addresses on your LAN, or you wish to check your TCP/IP settings, refer to

Appendix B – Windows TCP/IP Setup.

Internet Access

To configure your PCs to use the Load Balancer LB-2 for Internet access, follow this procedure:

For Windows 9x/2000

1.Select Start Menu - Settings - Control Panel - Internet Options.

2.Select the Connection tab, and click the Setup button.

3.Select "I want to set up my Internet connection manually, or I want to connect through a local area network (LAN)" and click Next.

4.Select "I connect through a local area network (LAN)" and click Next.

5.Ensure all of the boxes on the following Local area network Internet Configuration screen are unchecked.

6.Check the "No" option when prompted "Do you want to set up an Internet mail account now?".

7.Click Finish to close the Internet Connection Wizard. Setup is now completed.

For Windows XP

1.Select Start Menu - Control Panel - Network and Internet Connections.

2.Select Set up or change your Internet Connection.

3.Select the Connection tab, and click the Setup button.

4.Cancel the pop-up "Location Information" screen.

5.Click Next on the "New Connection Wizard" screen.

6.Select "Connect to the Internet" and click Next.

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7.Select "Set up my connection manually" and click Next.

8.Check "Connect using a broadband connection that is always on" and click Next.

9.Click Finish to close the New Connection Wizard. Setup is now completed.

Accessing AOL

To access AOL (America On Line) through the Load Balancer LB-2, the AOL for Windows software must be configured to use TCP/IP network access, rather than a dial-up connection. The configuration process is as follows:

•Start the AOL for Windows communication software. Ensure that it is Version 2.5, 3.0 or later. This procedure will not work with earlier versions.

•Click the Setup button.

•Select Create Location, and change the location name from "New Locality" to "Load Balancer LB- 2".

•Click Edit Location. Select TCP/IP for the Network field. (Leave the Phone Number blank.)

•Click Save, then OK. Configuration is now complete.

•Before clicking "Sign On", always ensure that you are using the "Load Balancer LB-2" location.

Macintosh Clients

From your Macintosh, you can access the Internet via the Load Balancer LB-2. The procedure is as follows.

1.Open the TCP/IP Control Panel.

2.Select Ethernet from the Connect via pop-up menu.

3.Select Using DHCP Server from the Configure pop-up menu. The DHCP Client ID field can be left blank.

4.Close the TCP/IP panel, saving your settings.

Note:

If using manually assigned IP addresses instead of DHCP, the required changes are:

•Set the Router Address field to the Load Balancer’s LB-2 IP Address.

•Ensure your DNS settings are correct.

Linux Clients

To access the Internet via the Load Balancer LB-2, it is only necessary to set the Load Balancer LB-2 as the "Gateway", and ensure your Name Server settings are correct.

Ensure you are logged in as "root" before attempting any changes.

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Fixed IP Address

By default, most Unix installations use a fixed IP Address. If you wish to continue using a fixed IP Address, make the following changes to your configuration.

•Set your Default Gateway to the IP Address of the Load Balancer LB-2.

•Ensure your DNS (Name server) settings are correct.

To act as a DHCP Client (recommended)

The procedure below may vary according to your version of Linux and X -windows shell.

1.Start your X Windows client.

2.Select Control Panel - Network

3.Select the "Interface" entry for your Network card. Normally, this will be called "eth0".

4.Click the Edit button, set the "protocol" to "DHCP", and save this data.

5.To apply your changes

Use the "Deactivate" and "Activate" buttons, if available. OR, restart your system.

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3: Advanced Port Setup

Overview

•Port Options contains some options, which can be set on either or both WAN ports. For most situations, the default values are satisfactory.

•Load Balance screen is only functional if you are using both WAN ports. It allows you to determine the proportion of WAN traffic sent through each port.

•Advanced PPPoE setup is required if you wish to use multiple sessions on one or both of the WAN ports. It can also be used to manually connect or disconnect a PPPoE session. Otherwise, this screen can be ignored.

•Advanced PPTP setup is required if using the PPTP connection method.

Port Options

Figure 9: Port Options

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Settings – Port Options

Connection Validation • Health Check – Disable will not do Alive Indicator Check. By default health check is enable. Health checking is performing an ICMP echo request and HTTP packets to the specific destination that could be either: 1. Name or IP Address user specified in the “Alive Indicator” input box or gateway of WAN interface if “Alive Indicator” input box is left blank.

		• Alive Indicator – This is the IP address used to check if the WAN
		connection is operating. The Load Balancer LB-2 will contact this
		system to check if the WAN connection is working. Change this
		address if you wish. Default is the gateway IP.
		Note: This is not used for PPPoE connections.
		• MTU – The Maximum Transmission Unit is used when determining
		the packet size to be used on the WAN interface. Normally, this
		does not need to be changed, but if your ISP advises you to use a
		particular MTU, enter it here.
	PPPoE / PPTP	• Auto Dialup – If set to Enable a connection will be established
	Connection Options	whenever outgoing WAN traffic is detected. If not Enabled, you
		must establish a connection manually.
		• Auto Disconnect – This determines when an idle connection will
		be terminated. Enter the required time period.
		• Echo Time – This determines how often an Echo request is sent to
		the PPPoE server. The Echo request is used to determine if the
		connection is still valid. Normally, there is no need to change the
		default value.
		• Echo Retry – The number of time the Echo request will be sent, if
		there is no response to the first request. Normally, there is no need
		to change the default value.
	Transparent Bridge	• Bridge Mode – If set to Enable, this WAN port doesn’t use NAT &
	Option	Load Balance function when LAN/WAN IP have the real IP
		addresses on the same network segment.
		• Traffic Management –Strict Binding : traffic from bridge hosts(eg.
		transparent to wan1) can only go thru that specified wan(eg.
		wan1) interface. Loose Binding : traffic from bridge hosts(eg.
		transparent to wan1) can go thru alternative wan(eg.
		wan2) interface when binded interface (eg. wan1) is down, it's
		acting like a fail over mechanism for transparent bridge mode. Load
		Balancing : Traffic from bridge hosts(eg. transparent to wan1) can
		go thru either wan(eg. wan1 or wan2) interface based on loading
		mechanism specified in the load balance section, it's acting like a
		load balancing mechanism for transparent bridge mode.
		• ARP Table – ARP table is used by the device to determine the
		bridge hosts’ location ( eg, inside/outside wan and which wan) its’
		size can be adjusted if needed.

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