ZyXEL Communications P-2802H-I Series, User Manual

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Chapter 7 LAN Setup
P-2802H(W)(L)-I Series User’s Guide
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The following table describes the labels in this screen.
7.6 LAN Client List
This table allows you to assign IP addresses on the LAN to specific individual computers
based on their MAC addresses.
Table 25 DHCP Setup
LABEL DESCRIPTION
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.