ZyXEL Communications P-660HW-Tx v3 User Manual page 117

The following table describes the labels in this screen.
Table 19 Network > Local Network (LAN) > DHCP Setup
LABEL
DHCP Setup
DHCP
IP Pool Starting
Address
Pool Size
Remote DHCP
Server
Lease Time
DNS Server
DNS Servers
Assigned by DHCP
Server
First DNS Server
Second DNS
Server
Third DNS Server
P-660HW-Tx v3 User's Guide
DESCRIPTION
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:
This field specifies the first of the contiguous addresses in the IP
address pool.
This field specifies the size, or count of the IP address pool.
If Relay is selected in the DHCP field above then enter the IP
address of the actual remote DHCP server here.
You can assign the DHCP lease time by entering the seconds
manually. The lease time must be 10 seconds or more.
The ZyXEL Device passes a DNS (Domain Name System) server IP
address to the DHCP clients.
Select Obtained From ISP if your ISP dynamically assigns DNS
server information (and the ZyXEL Device's WAN IP address).
Select User-Defined 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 User-Defined, but leave the IP address set to 0.0.0.0, User-
Defined changes to None after you click Apply. If you set a second
choice to User-Defined, 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.
Chapter 6 Local Network (LAN) Setup
117