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Defining Information for The DHCP Server
You must define certain information in the DSL LAN Extender software to use the DHCP feature. This
information is described in the section below.
Note : The DHCP server feature is most commonly used when the DSL LAN Extender CP device is
configured as an Internet access gateway, although you can use it when the DSL LAN Extender
CP is configured for another mode.
DHCP Enabled
To turn the DHCP feature on and off, use the arrow keys to position the cursor beside the DHCP Enabled
field. Press the <Enter> key to toggle between the Y and N settings. Select Y to turn the DHCP feature on
and select N to turn the feature off.
DHCP Range
Specify the range of IP addresses you want the DSL LAN Extender CP device (functioning as the DHCP
server) to assign the DHCP clients on your local LAN. Each machine you configure as a DHCP client
will be assigned an IP address in this range. The maximum number of DHCP clients supported by the
DSL LAN Extender CP is displayed in the DHCP Status/Configuration screen. Make sure the range of IP
addresses you specify are valid host IP addresses on the same sub-network as the sub-network connected
to the DSL LAN Extender CP device's Ethernet side.
Note : When you define the DHCP range, you should set aside a few IP addresses for your servers (such
as your Web and e-mail servers). For example , suppose the available IP addresses on your local
LAN include the addresses from 1.2.3.1 to 1.2.3.30. To reserve three IP addresses for your
servers, you could define the following DHCP range: 1.2.3.4 to 1.2.3.30.
To specify the DHCP IP address range:
1. Use the arrow keys to position the cursor beside the first DHCP Range field.
2. Type the starting IP address for the range.
3. Use the arrow keys to position the cursor beside the second DHCP Range field.
4. Type the ending IP address for the range.
5. Press <Ctrl-s> to save the new settings.
DNS Addresses
If your network includes DNS servers, you can configure the DSL LAN Extender CP device to
automatically pass the addresses of the DNS servers to DHCP clients. To set this up, you need to define
the IP addresses of the DNS servers (up to 3 allowed). Make sure you specify the correct host IP
addresses for each DNS server (if you do not know the IP addresses of the DNS servers on your network,
contact your system administrator or ISP for this information).
To define the DNS server information:
1. Use the <Up/Down> arrow keys to position the cursor beside the first field beside the DNS Servers
option.
2. Type the IP address for the first DNS server. Press the <Right> arrow key to move the cursor to the
next DNS Server's field.
3. Follow the above step to specify the IP addresses of up to a total of 3 DNS servers. Press <Ctrl-s>
to save this information.
© 2002 Black Box Corporation
DSL LAN Extender 400 User's Guide
Page 16
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