ZyXEL Communications P-792H User Manual page 91

The following table describes the labels in this screen.
Table 20 Network > LAN > DHCP Setup
LABEL
DHCP Setup
DHCP
IP Pool Starting
Address
Pool Size
Remote DHCP
Server
DNS Server
DNS Servers
Assigned by DHCP
Server
First DNS Server
Second DNS
Server
Third DNS Server
Apply
Cancel
P-792H v2 User's Guide
DESCRIPTION
If set to Server, your P-792H v2 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 P-792H v2 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.
The P-792H v2 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 P-792H v2'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
UserDefined changes to None after you click Apply.
Select DNS Relay to have the P-792H v2 act as a DNS proxy only
when the ISP uses IPCP DNS server extensions. The P-792H v2's LAN
IP address displays in the field to the right (read-only). The P-792H
v2 tells the DHCP clients on the LAN that the P-792H v2 itself is the
DNS server. When a computer on the LAN sends a DNS query to the
P-792H v2, the P-792H v2 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.
Click this to save your changes.
Click this to restore your previously saved settings.
Chapter 7 LAN Setup
91