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Chapter 8 LAN Setup
P-660RU-Tx User’s Guide
80
8.3.1
LANs, WANs and the ZyXEL Device
The actual physical connection determines whether the P-660RU-Tx ports are LAN
or WAN ports. There are two separate IP networks, one inside the LAN network
and the other outside the WAN network as shown next.
Figure 30 LAN and WAN IP Addresses
8.3.2 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 P-660RU-Tx as a DHCP server or disable it. When configured as a
server, the P-660RU-Tx provides the TCP/IP configuration for the clients. If you
turn DHCP service off, you must have another DHCP server on your LAN, or else
the computer must be manually configured.
8.3.3 DNS Server Addresses
DNS (Domain Name System) maps a domain name to its corresponding IP
address and vice versa. The DNS server is extremely important because without
it, you must know the IP address of a computer before you can access it. The DNS
server addresses you enter when you set up DHCP are passed to the client
machines along with the assigned IP address and subnet mask.
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 DNS server
addresses, enter them in the Primary and Secondary DNS Server fields.
WAN
LAN