User manual

39
Introduction
IP address assignment alternatives
There are several ways to assign an IP address to a Digi device:
 Static IP: Assign a specific IP address to a device, through the Digi Device
Setup Wizard, the web interface, or the command-line interface.
 Using Dynamic Host Configuration Protocol (DHCP). Dynamic Host
Configuration Protocol (DHCP) is an Internet protocol for automating the
configuration of computers that use TCP/IP. DHCP can be used to
automatically assign IP addresses, to deliver TCP/IP stack configuration
parameters such as the subnet mask and default router, and to provide other
configuration information. All Digi devices except Digi Connect WAN IA have
a DHCP server enabled by default. Digi Connect WAN IA is configured by
default to be a DHCP client.
 Auto Private IP Addressing (APIPA), also known as Auto-IP: A standard
protocol that will automatically assign an IP address from a reserved pool of
standard Auto-IP addresses to the computer on which it is installed. The device
is set to obtain its IP address automatically from a DHCP server. But if the
DHCP server is unavailable or nonexistent, Auto-IP will assign the device an
IP address. If DHCP is enabled or responds later ADDP is used, both will
override the Auto-IP address previously assigned.
For more details, see "Default IP address" on page 64 and "Alternate methods for
assigning an IP address" on page 64.