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2: Introduction
XPress DR+ User Guide 15
Addresses and Port Numbers
Hardware Address
The hardware address is also referred to as the Ethernet address or MAC address. The
first three bytes of the Ethernet address are fixed and read 00-20-4A, identifying the unit
as a Lantronix product. The fourth, fifth, and sixth bytes are unique numbers assigned to
each unit.
Figure 2-4. Sample Hardware Address
00-20-4A-14-01-18 or 00:20:4A:14:01:18
IP Address
Every device connected to an IP network must have a unique IP address. This address
references the specific unit.
Port Numbers
Every TCP connection and every UDP datagram is defined by a destination IP address
and a port number. For example, a Telnet application commonly uses port number 23. A
port number is similar to an extension on a phone system.
You can associate the unit's serial channel (port) with a specific TCP/UDP port number.
Port number 9999 is reserved for access to the unit's Setup (configuration) Mode.
Configuration Methods
After installation, the XPress DR+ requires configuration for the unit to operate correctly
on a network. There are three basic methods for logging into the XPress DR+ and editing
the configurable settings.
DeviceInstaller: Configures the IP address and other network settings on the XPress
DR+ using a Graphical User Interface (GUI) on a PC attached to a network.
(See 4: Using DeviceInstaller.)
Web-Manager: Through a web interface, configures the XPress DR+ settings using the
Lantronix Web-Manager. (See 5: Configuration Using Web-Manager.)
Serial and Telnet Ports: There are two approaches to accessing Setup Mode: making a
Telnet connection to the network port (9999) or connecting a terminal (or a PC running a
terminal emulation program) to the unit’s serial port.
(See 6: Configuration Using Telnet or Serial Port (Setup Mode) through 9: Setup Mode:
Advanced Settings.)