Prestige Dhcp Modes; Configuring Dhcp Server - ZyXEL Communications Prestige 623 series User Manual

Prestige 623 Series Dual-link ADSL Router

7.1.3 Prestige DHCP modes

The Prestige can be configured as a DHCP server, DHCP relay agent, or, in some cases, a DHCP client.
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If you configure the Prestige as a DHCP server, it will maintain the pool of addresses and
distribute them to your LAN computers. If the pool of addresses includes private IP addresses, you
must also configure the Network Address Translation service, so that the private addresses can be
translated to your public IP address on the Internet
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If your ISP performs the DCHP server function for your network, then you can configure the
Prestige as a DHCP relay agent. When the Prestige receives a request for Internet access from a
computer on your network, it contacts your ISP for the necessary IP information, and then relays
the assigned information back to the computer.
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If you have another computer or device on your network that is already performing the DHCP
server function, then you can configure the LAN port on the device to be a DHCP client of that
server (as are your computers). This configuration is not discussed in this chapter. See the chapter
on LAN IP settings.
You can input settings for both DHCP server and DHCP relay mode, and then
activate either mode at any time. De-activated settings are retained for your future
7.2

Configuring DHCP Server

Before you begin, determine the pool of IP addresses you want to make available for distribution to your
computers. These addresses can be multiple public addresses that you have purchased from your ISP, but
are typically private addresses that you create. (Network administrators often create private IP addresses for
use only on their networks. See Overview of NAT section.)
By default, the Prestige is configured as a DHCP server, with a predefined IP
address pool of 192.168.1.3 through 192.168.1.34 (subnet mask 255.255.255.0).
Refer to the Setting Up Your Computer's IP Address appendix.
The following sections describe the three steps in configuring DHCP server for you Prestige.
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Create IP pool
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Enable Prestige as DHCP server
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Configure your computer to accept the assigned IP address from the Prestige.
7-2
use.
Configuring Dynamic Host Configuration Protocol