ZyXEL Communications P-2900-4HB - Manual (Page 54)

Chapter 5 LAN Setup
P-2900-4HB User’s Guide
54
5.4 LAN Technical Reference
This section provides some technical background information about the topics
covered in this chapter.
5.4.1 DHCP Setup
DHCP (Dynamic Host Configuration Protocol, RFC 2131 and RFC 2132) allows
individual clients to obtain TCP/IP configuration at start-up from a server. You can
configure the ZyXEL Device as a DHCP server or disable it. When configured as a
server, the ZyXEL Device provides the TCP/IP configuration for the clients. If you
turn the DHCP server off, you must have another DHCP server on your LAN, or
else the computer must be manually configured.
IP Pool Setup
The ZyXEL Device is pre-configured with a pool of IP addresses for the DHCP
clients (DHCP Pool). See the product specifications in the appendices. Do not
assign static IP addresses from the DHCP pool to your LAN computers.
5.4.2 DNS Server Address
There are two ways that an ISP disseminates the DNS server addresses.
• The ISP tells you the DNS server addresses, usually in the form of an
information sheet, when you sign up. If your ISP gives you the DNS server
addresses, enter them in the DNS Server fields in the LAN Setup screen.
• The ZyXEL Device acts as a DNS proxy when the Primary and Secondary DNS
Server fields are left blank in the LAN Setup screen.
5.4.3 LAN TCP/IP
The ZyXEL Device has built-in DHCP server capability that assigns IP addresses
and DNS servers to systems that support DHCP client capability.
IP Address and Subnet Mask
Where you obtain your network number depends on your particular situation. If
the ISP or your network administrator assigns you a block of registered IP
addresses, follow their instructions in selecting the IP addresses and the subnet
mask.
If the ISP did not explicitly give you an IP network number, then most likely you
have a single user account and the ISP will assign you a dynamic IP address when