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LAN IP Address

Enter the IP address of your BIPAC-5100/5100W in dotted decimal notation, for

example, 192.168.1.254 (factory default).

LAN Subnet Mask

Enter a subnet mask in dotted decimal notation.

DHCP

DHCP Server

From the

DHCP Server

drop-down list box, select

On

to allow your

BIPAC-5100/5100W to assign IP addresses, an IP default gateway and DNS servers

to computer systems that support the DHCP client. Select

Off

to disable DHCP

server.

When DHCP server is used, set the following items:

Client IP Pool

Starting Address

This field specifies the first of the contiguous addresses in the IP address pool.

Size of Client IP

Pool

This field specifies the size or count of the IP address pool.

Primary DNS

Server

Enter the IP addresses of the DNS servers. The DNS servers are passed to the

DHCP clients along with the IP address and the subnet mask.

Secondary DNS

Server

As above.

Back

Click

Back

to go back to the first wizard screen.

Finish

Click

Finish

to save the settings and proceed to the next wizard screen.

3.13 Wizard Setup Configuration: Connection Tests

The BIPAC-5100/5100W automatically tests the connection to the computer(s) connected to

the LAN ports. To test the connection from the BIPAC-5100/5100W to the ISP, click Start

Diagnose. Otherwise click Return to Main Menu to go back to the Site Map screen.

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3.14 Test Your Internet Connection

Launch your web browser and navigate to www.billion.com. Internet access is just the

beginning. Refer to the rest of this User’s Guide for more detailed information on the complete

range of BIPAC-5100/5100W features. If you cannot access the Internet, open the web

configurator again to confirm that the Internet settings you configured in the Wizard Setup are

correct.

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Chapter 4

LAN Setup

802.11b is only supported for the BIPAC-5100W

This chapter describes how to configure LAN settings.

4.1 LAN Overview

A Local Area Network (LAN) is a shared communication system to which many computers are

attached. A LAN is a computer network limited to the immediate area, usually the same

building or floor of a building.

The LAN screens can help you configure a LAN DHCP server and manage IP addresses.

4.1.1 LANs, WANs and the BIPAC-5100/5100W

The actual physical connection determines whether the BIPAC-5100/5100W ports are LAN or

WAN ports. There are two separate IP networks, one inside, the LAN network; the other

outside: the WAN network as shown next:

4.2 DNS Server Address

DNS (Domain Name System) is for mapping a domain name to its corresponding IP address

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and vice versa, for example, the IP address of www.billion.com is 204.217.0.2. The DNS

server is extremely important because without it, you must know the IP address of a machine

before you can access it. The DNS server addresses that you enter in the DHCP setup are

passed to the client machines along with the assigned IP address and subnet mask.

There are two ways that an ISP disseminates the DNS server addresses. The first is for an ISP

to tell a customer the DNS server addresses, usually in the form of an information sheet, when

s/he signs up. If your ISP gives you the DNS server addresses, enter them in the DNS Server

fields in DHCP Setup, otherwise, leave them blank.

Some ISP’s choose to pass the DNS servers using the DNS server extensions of PPP IPCP

(IP Control Protocol) after the connection is up. If your ISP did not give you explicit DNS

servers, chances are the DNS servers are conveyed through IPCP negotiation. The

BIPAC-5100/5100W supports the IPCP DNS server extensions through the DNS proxy

feature.

If the Primary and Secondary DNS Server fields in DHCP Setup are not specified, for instance,

left as 0.0.0.0, the BIPAC-5100/5100W tells the DHCP clients that it itself is the DNS server.

When a computer sends a DNS query to the BIPAC-5100/5100W, the BIPAC-5100/5100W

forwards the query to the real DNS server learned through IPCP and relays the response back

to the computer.

Please note that DNS proxy works only when the ISP uses the IPCP DNS server extensions. It

does not mean you can leave the DNS servers out of the DHCP setup under all circumstances.

If your ISP gives you explicit DNS servers, make sure that you enter their IP addresses in the

DHCP Setup menu. This way, the BIPAC-5100/5100W can pass the DNS servers to the

computers and the computers can query the DNS server directly without the

BIPAC-5100/5100W’s intervention.

4.3 DNS Server Address Assignment

Use DNS (Domain Name System) to map a domain name to its corresponding IP address and

vice versa. The DNS server is extremely important because without it, you must know the IP

address of a computer before you can access it.

There are two ways that an ISP disseminates the DNS server addresses.

1. The ISP tells you the DNS server addresses, usually in the form of an information sheet,

when you sign up. If your ISP gives you DNS server addresses, enter them in the DNS Server

fields in DHCP Setup.

2. Leave the DNS Server fields in DHCP Setup blank (for example 0.0.0.0). The

BIPAC-5100/5100W acts as a DNS proxy when this field is blank.

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4.4 LAN TCP/IP

The BIPAC-5100/5100W has built-in DHCP server capability that assigns IP addresses and

DNS servers to systems that support DHCP client capability.

4.4.1 Factory LAN Defaults

The LAN parameters of the BIPAC-5100/5100W are preset in the factory with the following

values:

¾

IP address of 192.168.1.254 with subnet mask of 255.255.255.0 (24 bits)

¾

DHCP server enabled with 100 client IP addresses starting from 192.168.1.100.

These parameters should work for the majority of installations. If your ISP gives you explicit

DNS server address(es), read the embedded web configurator help regarding what fields need

to be configured.

4.4.2 IP Address and Subnet Mask

Refer to the IP Address and Subnet Mask section in the Wizard Setup chapter for this

information.

4.4.3 RIP Setup

RIP (Routing Information Protocol) allows a router to exchange routing information with other

routers. The RIP Direction field controls the sending and receiving of RIP packets. When set

to:

1. Both - the BIPAC-5100/5100W will broadcast its routing table periodically and incorporate

the RIP information that it receives.

2. In Only - the BIPAC-5100/5100W will not send any RIP packets but will accept all RIP

packets received.

3. Out Only - the BIPAC-5100/5100W will send out RIP packets but will not accept any RIP

packets received.

4. None - the BIPAC-5100/5100W will not send any RIP packets and will ignore any RIP

packets received.

The Version field controls the format and the broadcasting method of the RIP packets that the

BIPAC-5100/5100W sends (it recognizes both formats when receiving). RIP-1 is universally

supported; but RIP-2 carries more information. RIP-1 is probably adequate for most networks,

unless you have an unusual network topology.

Both RIP-2B and RIP-2M sends the routing data in RIP-2 format; the difference being that

RIP-2B uses subnet broadcasting while RIP-2M uses multicasting.

4.4.4 Multicast

Traditionally, IP packets are transmitted in one of either two ways - Unicast (1 sender - 1

recipient) or Broadcast (1 sender - everybody on the network). Multicast delivers IP packets to

a group of hosts on the network - not everybody and not just 1.