ZyXEL Communications Prestige 310 - Manual (Page 43)

Prestige 310 Broadband Sharing Gateway
Internet Access 3-1
Chapter 3:
Internet Access
This chapter shows you how to configure the LAN as well as the WAN of your Prestige for Internet
access.
3.1 TCP/IP and DHCP for LAN
The Prestige has built-in DHCP server capability that assigns IP addresses and DNS servers to systems that
support DHCP client capability.
3.1.1 Factory LAN Defaults
The LAN parameters of the Prestige are preset in the factory with the following values:
1. IP address of 192.168.1.1 with subnet mask of 255.255.255.0 (24 bits)
2. DHCP server enabled with 32 client IP addresses starting from 192.168.1.33.
These parameters should work for the majority of installations. If the parameters are satisfactory, you can
skip to section 3.2 to enter the DNS server address(es) if your ISP gives you explicit DNS server address(es).
If you wish to change the factory defaults or to learn more about TCP/IP, please read on.
3.1.2 IP Address and Subnet Mask
Similar to the houses on a street that share a common street name, the machines on a LAN share one
common network number, also.
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 the connection is established. If this is the case, it is
recommended that you select a network number from 192.168.0.0 to 192.168.255.0 (ignoring the trailing
zero) and you must enable the Network Address Translation feature of the Prestige. The Internet Assigned
Number Authority (IANA) reserved this block of addresses specifically for private use; please do not use any
other number unless you are told otherwise. Let’s say you select 192.168.1.0 as the network number; which
covers 254 individual addresses, from 192.168.1.1 to 192.168.1.254 (zero and 255 are reserved). In other
words, the first 3 numbers specify the network number while the last number identifies an individual
workstation on that network.
Once you have decided on the network number, pick an IP address that is easy to remember, e.g.,
192.168.1.1, for your Prestige.