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three numbers denote the host IP address (each computer must have a unique address to distinguish it
on the network). The IP address scheme used in Example #1 can be used for any LAN that requires up to
253 separate IP addresses (excluding the Router). Notice that the subnet mask is the same for all
machines and the default gateway address is the LAN IP address of the Router.
It is a good idea to make a note of each device's IP address for reference during troubleshooting or when
adding new stations or devices.
Using DHCP
The second way to use the default settings is to allow the Router to automatically assign IP settings for
workstation using DHCP. To do this, simply make sure your computers' IP addresses are set to 0.0.0.0
(under Windows, choose the option Obtain an IP address automatically in the TCP/IP network component
described above). When the computers are restarted, their IP settings will automatically be assigned by
the Router. The Router is set by default to use DHCP. See the discussion in Chapter 3 for information on
how to use configure the Router for DHCP.
Changing the IP Address of the Router
When planning your LAN IP address setup, you may use any scheme allowed by rules that govern IP
assignment. It may be more convenient or easier to remember an IP scheme that use a different address
for the Router. Or you may be installing the Router on a network that has already established the IP
settings. Changing the IP address is a simple matter and can be done using the web manager (see LAN
IP Address in Chapter 5). If you are incorporating the Router into a LAN with an existing IP structure, be
sure to disable the DHCP function. Also, consider the effects of NAT (Network Address Translation). This
is enabled by default but may be disabled in the NAT menu of the Advanced directory.
An IP addressing scheme commonly used for Ethernet LANs establishes 10.0.0.1 as the base address for
the network. Using Example #2 below, the Router is assigned the base address 10.0.0.1 and the
remaining addresses are assigned manually or using DHCP.
Host
Router
Computer #1
Computer #2
Computer #3
These two examples are only examples you can use to help you get started. Other common private
network IP addressing schemes use a base address of 192.168.0.1 or 192.168.1.1. If you are interested
in more advanced information on how to use IP addressing on a LAN there are numerous resources freely
available on the Internet. There are also many books and chapters of books on the subject of IP address
assignment, IP networking and the TCP/IP protocol suite.
DSL-504T DSL Router User's Guide
Alternative IP Assignment
IP Address
Subnet Mask
10.0.0.1
255.0.0.0
10.0.0.2
255.0.0.0
10.0.0.3
255.0.0.0
10.0.0.4
255.0.0.0
IP Setup - Example #2
101
Gateway IP
10.0.0.1
10.0.0.1
10.0.0.1
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