Lantronix 900-422 User Manual

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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 
Web-Manager:  Through a web interface, configures the XPress DR+ settings using the 
Lantronix Web-Manager. (See
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
.)