Garmin HM210DP/DI - Manual (Page 50)

Configuring DHCP
42 EN/LZT 108 6492 R2 - October 2003
7 Configuring DHCP
You can configure your network and HM210dp/di to use the Dynamic Host
Configuration Protocol (DHCP). This chapter provides instructions for
implementing DHCP on your network.
7.1 Overview of DHCP
DHCP is a protocol that enables network administrators to centrally
manage the assignment and distribution of IP information to computers on
a network.
When you enable DHCP on a network, you allow a device – such as the
HM210dp/di or a router located with your ISP – to assign temporary IP
addresses to your computers whenever they connect to your network. The
assigning device is called a DHCP Server and the receiving device is a
DHCP Client.
The DHCP server draws from a defined pool of IP addresses and “leases”
them for a specified amount of time to your computers when they request
an Internet session. It monitors, collects, and redistributes the addresses as
needed.
On a DHCP-enabled network, the IP information is assigned dynamically
rather than statically. A DHCP client can be assigned a different address
from the pool each time it reconnects to the network.
DHCP allows you to manage and distribute IP addresses throughout your
network from a central computer. Without DHCP, you would have to
configure each computer separately with IP addresses and related
information. DHCP is commonly used with large networks and those that
are frequently expanded or otherwise updated
7.2 DHCP Modes
The HM210dp/di can be configured as a DHCP server, DHCP relay agent,
or in some cases, a DHCP client.
DHCP Server
The HM210dp/di will maintain the pool of addresses and distribute
them to your LAN computers. If the pool of addresses includes
private IP addresses, you must also configure the Network Address
Translation (NAT) service, so that the private addresses can be