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Wireless ADSL2/2+ Modem Router User Guide
22
DHCP
What DHCP Does
A DHCP (Dynamic Host Configuration Protocol) Server allocates a valid IP address to
a DHCP Client (PC or device) upon request.
• The client request is made when the client device starts up (boots).
• The DHCP Server provides the Gateway and DNS addresses to the client, as well
as allocating an IP Address.
• The Wireless ADSL2/2+ Modem Router can act as a DHCP server.
• Windows 95/98/ME and other non-Server versions of Windows will act as a DHCP
client. This is the default Windows setting for the TCP/IP network protocol. How-
ever, Windows uses the term Obtain an IP Address automatically instead of
"DHCP Client".
• You must NOT have two (2) or more DHCP Servers on the same LAN segment.
(If your LAN does not have other Routers, this means there must only be one (1)
DHCP Server on your LAN.)
Using the Wireless ADSL2/2+ Modem Router's DHCP Server
This is the default setting. The DHCP Server settings are on the LAN screen. On this
screen, you can:
• Enable or Disable the Wireless ADSL2/2+ Modem Router's DHCP Server function.
• Set the range of IP Addresses allocated to PCs by the DHCP Server function.
You can assign Fixed IP Addresses to some devices
while using DHCP, provided that the Fixed IP Addresses
are NOT within the range used by the DHCP Server.
Using another DHCP Server
You can only use one (1) DHCP Server per LAN segment. If you wish to use another
DHCP Server, rather than the Wireless ADSL2/2+ Modem Router's, the following
procedure is required.
• Disable the DHCP Server feature in the Wireless ADSL2/2+ Modem Router. This
setting is on the LAN screen.
• Configure the DHCP Server to provide the Wireless ADSL2/2+ Modem Router's
IP Address as the Default Gateway.
To Configure your PCs to use DHCP
This is the default setting for TCP/IP for all non-Server versions of Windows.
See Chapter 4 - Client Configuration for the procedure to check these settings.