ZyXEL p-2802h-i1 Guia Do Utilizador

 Chapter 7 LAN Setup

P-2802H(W)(L)-I Series User’s Guide

The following table describes the labels in this screen.

This table allows you to assign IP addresses on the LAN to specific individual computers 
based on their MAC addresses. 

Table 25   DHCP Setup 

DHCP Setup

DHCP

If set to Server, your ZyXEL Device can assign IP addresses, an IP default 

gateway and DNS servers to Windows 95, Windows NT and other systems that 

support the DHCP client.
If set to None, the DHCP server will be disabled. 
If set to Relay, the ZyXEL Device acts as a surrogate DHCP server and relays 

DHCP requests and responses between the remote server and the clients. 

Enter the IP address of the actual, remote DHCP server in the Remote DHCP 

Server field in this case. 
When DHCP is used, the following items need to be set: 

IP Pool Starting 

Address

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

Pool Size

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

Remote DHCP 

Server

If Relay is selected in the DHCP field above then enter the IP address of the 

actual remote DHCP server here.

DNS Server

DNS Servers 

Assigned by DHCP 

Server

The ZyXEL Device passes a DNS (Domain Name System) server IP address to 

the DHCP clients. 

First DNS Server

Second DNS 

Server

Third DNS 

Server

Select Obtained From ISP if your ISP dynamically assigns DNS server 

information (and the ZyXEL Device's WAN IP address).
Select UserDefined if you have the IP address of a DNS server. Enter the DNS 

server's IP address in the field to the right. If you chose UserDefined, but leave 

the IP address set to 0.0.0.0, UserDefined changes to None after you click 

Apply. If you set a second choice to UserDefined, and enter the same IP 

address, the second User-Defined changes to None after you click Apply. 
Select DNS Relay to have the ZyXEL Device act as a DNS proxy only when the 

ISP uses IPCP DNS server extensions.

 

The ZyXEL Device's LAN IP address 

displays in the field to the right (read-only). The ZyXEL Device tells the DHCP 

clients on the LAN that the ZyXEL Device itself is the DNS server. When a 

computer on the LAN sends a DNS query to the ZyXEL Device, the ZyXEL 

Device forwards the query to the real DNS server learned through IPCP and 

relays the response back to the computer. You can only select DNS Relay for 

one of the three servers; if you select DNS Relay for a second or third DNS 

server, that choice changes to None after you click Apply. 
Select None if you do not want to configure DNS servers. You must have 

another DHCP sever on your LAN, or else the computers must have their DNS 

server addresses manually configured. If you do not configure a DNS server, 

you must know the IP address of a computer in order to access it.

Apply

Click Apply to save your changes back to the ZyXEL Device.

Cancel

Click Cancel to begin configuring this screen afresh.