ZyXEL Communications P-128IMH, User Manual, Page: 58 / 191

Prestige 128IMH ISDN Modem/ Router/Hub
3-2 Internet Access
3.2 TCP/IP Parameters
3.2.1 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 Single User Account 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 sele ct 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.
The subnet mask specifies the network number portion of an IP address. Your Prestige will
compute the subnet mask automatically based on the IP address that you entered. You don’t need
to change the subnet mask computed by the Prestige unless you are instructed to do otherwise.
3.2.2 RIP Setup
RIP (Routing Information Protocol) allows a router to exchange routing information with other
routers. The
RIP Direction field controls the sending and receiving of RIP packets. When set to
both, the Prestige will broadcast its routing table periodically and incorporate the RIP information