3G Broadband Wireless Router MBR624GU User Manual

Advanced Configuration

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The LAN TCP/IP Setup parameters are explained in the following table.

Table 5-2.

LAN IP Setup

Settings

Description

LAN TCP/IP

Setup

IP Address

The LAN IP address of the router.

IP Subnet Mask

The LAN subnet mask of the router. Combined with the IP

address, the IP Subnet Mask allows a device to know which

other addresses are local to it, and which must be reached

through a gateway or router.

RIP Direction

RIP (Router Information Protocol) allows a router to

exchange routing information with other routers. This

setting controls how the router sends and receives RIP

packets.

Both

is the default.

•

Both

or

Out Only

. The router broadcasts its routing table

periodically.

•

Both

or

In Only

. The router incorporates the RIP

information that it receives.

•

None

. The router will not send any RIP packets and will

ignore any RIP packets received.

RIP Version

This controls the format and the broadcasting method of the

RIP packets that the router sends. It recognizes both

formats when receiving. By default, this is

RIP-1

.

•

RIP-1 is universally supported. It is adequate for most

networks, unless you have an unusual network setup.

•

RIP-2 carries more information. Both RIP-2B and RIP-2M

send the routing data in RIP-2 format. RIP-2B uses

subnet broadcasting. RIP-2M uses multicasting.

DHCP Server

For more

information, see

“DHCP

Settings” on

page 5-6

.

Use Router as a DHCP

Server

This check box is usually selected so that the router

functions as a Dynamic Host Configuration Protocol

(DHCP) server. See

“DHCP Settings” on page 5-6

.

Starting IP Address

Specify the start of the range for the pool of IP addresses in

the same subnet as the router.

Ending IP Address

Specify the end of the range for the pool of IP addresses in

the same subnet as the router.

Address Reservation

For more information, see

“DHCP Settings” on

page 5-6

.

When you specify a reserved IP address for a computer on

the LAN, that computer receives the same IP address each

time it access the router’s DHCP server. Assign reserved IP

addresses to servers that require permanent IP settings.

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DHCP Settings

By default, the router functions as a Dynamic Host Configuration Protocol (DHCP) server,

allowing it to assign IP, DNS server, and default gateway addresses to all computers connected to

the router’s LAN. The assigned default gateway address is the LAN address of the router. IP

addresses is assigned to the attached PCs from a pool of addresses specified in this screen. Each

pool address is tested before it is assigned to avoid duplicate addresses on the LAN.

For most applications, the default DHCP and TCP/IP settings of the router are satisfactory. See the

online document listed in

“Internet Networking and TCP/IP Addressing” in Appendix B

for an

explanation of DHCP and information about how to assign IP addresses for your network.

Use Router as DHCP Server

If another device on your network will be the DHCP server, or if you will manually configure the

network settings of all of your computers, clear the

Use Router as DHCP Server

check box on

the LAN IP Setup screen. Otherwise, leave it selected.

Specify the pool of IP addresses to be assigned by filling in the

Starting IP Address

and

Ending

IP Address

fields. These addresses should be part of the same IP address subnet as the router’s

LAN IP address. Using the default addressing scheme, you should define a range between

192.168.0.2 and 192.168.0.254, although you might want to save part of the range for devices with

fixed addresses.

The router delivers the following parameters to any LAN device that requests DHCP:

•

An IP address from the range you have defined.

•

Subnet mask.

•

Gateway IP Address is the router’s LAN IP address.

•

Primary DNS server, if you entered a primary DNS address in the Basic Settings screen;

otherwise, the router’s LAN IP address.

•

Secondary DNS server, if you entered a secondary DNS address in the Basic Settings screen.

•

WINS Server (Windows Internet Naming Service Server), determines the IP address

associated with a particular Windows computer. A WINS server records and reports a list of

names and IP address of Windows PCs on its local network. If you connect to a remote

network that contains a WINS server, enter the server’s IP address here. This allows your PCs

to browse the network using the Network Neighborhood feature of Windows.

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Reserved IP Addresses

When you specify a reserved IP address for a computer on the LAN, that computer always

receives the same IP address each time it access the router’s DHCP server. Reserved IP addresses

should be assigned to servers that require permanent IP settings.

To reserve an IP address:

1.

Click the

Add

button.

2.

In the

IP Address

field, type the IP address to assign to the computer or server. Choose an IP

address from the router’s LAN subnet, such as 192.168.0.x.

3.

Type the MAC address of the computer or server.

4.

Click

Apply

to enter the reserved address into the table.

To edit or delete a reserved address entry:

1.

Click the button next to the reserved address you want to edit or delete.

2.

Click

Edit

or

Delete

.

Dynamic DNS

If your network has a permanently assigned IP address, you can register a domain name and have

that name linked with your IP address by public Domain Name Servers (DNS). However, if your

Internet account uses a dynamically assigned IP address, you will not know in advance what your

IP address will be, and the address can change frequently. In this case, you can use a commercial

Dynamic DNS service to register your domain to their IP address, and forward traffic directed at

your domain to your frequently changing IP address.

The router contains a client that can connect to a Dynamic DNS service provider. To use this

feature, you must select a service provider and obtain an account with them. After you have

Tip:

If the computer is on your network, it is listed on the same page for your

convenience. Clicking the radio button for each entry in the attached device list

fills in the fields automatically with the computer’s MAC address and name.

Note:

The reserved address will not be assigned until the next time the computer

contacts the router’s DHCP server. Reboot the computer or access its IP

configuration and force a DHCP release and renew.

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configured your account information in the router, whenever your ISP-assigned IP address

changes, your router will automatically contact your Dynamic DNS service provider, log in to

your account, and register your new IP address.

Configuring Dynamic DNS

1.

Log in to the router at its default LAN address of

with its default user name

of

admin

default password of

password

, or using whatever user name, password and LAN

address you have chosen for the router.

2.

From the main menu, select Dynamic DNS to display the Dynamic DNS screen:

3.

Access the website of one of the Dynamic DNS service providers whose names appear in the

Service Provider

drop-down list, and register for an account.

For example, for dyndns.org, go to www.dyndns.org.

4.

Select the

Use a Dynamic DNS Service

check box.

5.

Select the name of your dynamic DNS service provider.

6.

Fill in the

Host Name

,

User Name

, and

Password

fields.

The dynamic DNS service provider may call the host name a domain name. If your URL is

myName.dyndns.org, then your host name is myName. The password can be a key for your

dynamic DNS account.

Warning:

If your ISP assigns a private WAN IP address such as 192.168.x.x or 10.x.x.x,

the Dynamic DNS service will not work because private addresses will not be

routed on the Internet.

Figure 5-3

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7.

If your dynamic DNS provider allows the use of wildcards in resolving your URL, you can

select the

Use wildcards

check box to activate this feature.

For example, the wildcard feature will cause *.yourhost.dyndns.org to be aliased to the same

IP address as yourhost.dyndns.org.

8.

Click

Apply

to save your configuration.

Using Static Routes

Static routes provide additional routing information to your router. Under normal circumstances,

the router has adequate routing information after it has been configured for Internet access, and

you do not need to configure additional static routes. You must configure static routes only for

unusual cases such as multiple routers or multiple IP subnets located on your network.

Static Route Example

As an example of when a static route is needed, consider the following case:

•

Your primary Internet access is through a cable modem to an ISP.

•

You have an ISDN router on your home network for connecting to the company where you are

employed. This router’s address on your LAN is 192.168.0.100.

•

Your company’s network is 134.177.0.0.

When you first configured your router, two implicit static routes were created. A default route was

created with your ISP as the router, and a second static route was created to your local network for

all 192.168.0.x addresses. With this configuration, if you attempt to access a device on the

134.177.0.0 network, your router forwards your request to the ISP. The ISP forwards your request

to the company where you are employed, and the request is likely to be denied by the company’s

firewall.

In this case you must define a static route, telling your router that 134.177.0.0 should be accessed

through the ISDN router at 192.168.0.100. The static route would look like

Figure 5-5

.

In this example:

•

The

Destination IP Address

and

IP Subnet Mask

fields specify that this static route applies

to all 134.177.x.x addresses.

•

The

Gateway IP Address

fields specify that all traffic for these addresses should be

forwarded to the ISDN router at 192.168.0.100.