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Chapter 5
LAN Screens
LAN Overview
5.1
Local Area Network (LAN) is a shared communication system to which many computers are
attached. The LAN screens can help you configure a LAN DHCP server, manage IP addresses, and
partition your physical network into logical networks.
DHCP Setup
5.2
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 Contivity 221 as a
DHCP server or disable it. When configured as a server, the Contivity 221 provides the TCP/IP
configuration for the clients. If set to None, DHCP service will be disabled and you must have
another DHCP server on your LAN, or else the computer must be manually configured.
5.2.1
IP Pool Setup
The Contivity 221 is pre-configured with a pool of 32 IP addresses starting from 192.168.1.3 to
192.168.1.34. This configuration leaves 31 IP addresses (excluding the Contivity 221 itself) in the
lower range for other server computers, for instance, servers for mail, FTP, TFTP, web, etc., that
you may have.
5.2.2
DNS Servers
Use the LAN IP screen to configure the DNS server information that the Contivity 221 sends to the
DHCP client devices on the LAN.
LAN TCP/IP
5.3
The Contivity 221 has built-in DHCP server capability that assigns IP addresses and DNS servers
to systems that support DHCP client capability.
5.3.1
Factory LAN Defaults
The LAN parameters of the Contivity 221 are preset in the factory with the following values:
This chapter describes how to configure LAN settings.
Contivity 221 VPN Switch User's Guide
5-1
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