Ip Address Assignment; Dhcp Configuration; Ip Address And Subnet Mask; Chapter 4 Lan, Wan And Server Setup - ZyXEL Communications VSG-1200 User Manual

4.1 Factory Ethernet Defaults
The Ethernet parameters of the VSG are preset to the following values:
1. WAN IP address of 192.168.1.1 with subnet mask of 255.255.255.0.
2. LAN IP address of 10.59.1.1.
3. DHCP server enabled on the LAN with a 252 client IP address pool starting from 10.59.1.2
These parameters should work for the majority of installations. If you wish to change the factory defaults or to learn
more about TCP/IP, please read on.
4.2 LANs and WANs
A LAN (Local Area Network) is a computer network limited to the immediate area, usually the same building or
floor of a building. A WAN (Wide Area Network), on the other hand, is an outside connection to another network
or the Internet.

4.3 IP Address Assignment

A static IP is a fixed IP that the VSG obtains from a DHCP server on a network. A dynamic IP is not fixed; the
DHCP server provides an IP address to the VSG each time it connects to the network. When an Ethernet device is
configured to obtain a dynamic IP address from a DHCP server, it is known as a DHCP client.

4.4 DHCP Configuration

DHCP (Dynamic Host Configuration Protocol) allows the individual clients (Ethernet device) to obtain the TCP/IP
configuration at start-up from a centralized DHCP server. The VSG has built-in DHCP server capability, which
means it can assign IP addresses, an IP default gateway and DNS servers to computer systems that support the
DHCP client when this feature is activated. The VSG can also act as a surrogate DHCP server where it relays IP
address assignment from the actual DHCP server to the clients.
4.4.1

IP Address and Subnet Mask

Like houses on a street that share a common street name, the computers on a LAN share one common network
number.
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.
The Internet Assigned Number Authority (IANA) reserved a block of addresses specifically for private use (refer to
Section 4.4.2); 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 three numbers specify the network number while the last number identifies
an individual computer on that network.
The subnet mask specifies the network number portion of an IP address.
LAN, WAN and Server Setup
LAN, WAN and Server Setup
This chapter shows you how to configure LAN and WAN ports and server settings.
VSG-1200 Vantage Service Gateway
Chapter 4
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