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Protocol Support
The XPort Direct+ device server uses the Internet Protocol (IP) for network
communications. It uses the Transmission Control Protocol (TCP) to assure that no
data is lost or duplicated, and that everything sent to the connection arrives correctly
at the target.
Supported protocols include:
Addresses and Port Numbers
Hardware Address
The hardware address is also referred to as the Ethernet address or the 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.
Note:
Make note of the MAC address. It is needed to locate the XPort
Direct+ using DeviceInstaller.
IP Address
Every device connected to an IP network must have a unique IP address. This
address is used to reference the specific unit. The XPort Direct+ is automatically
assigned an IP address on DHCP-enabled networks, as it is DHCP-enabled by
default.
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.
The unit's serial channel (port) can be associated with a specific TCP/UDP port
number. Port number 9999 is reserved for access to the unit's Setup (configuration)
Mode window. Ports 0-1024 are reserved as well. For more information on reserved
port numbers, see to
XPort Direct+ User Guide
ARP, UDP, TCP, ICMP, Telnet, TFTP, AutoIP, DHCP, HTTP, and SNMP for
network communications and management.
TCP, UDP, and Telnet for connections to the serial port.
TFTP for firmware and web page updates.
IP for addressing, routing, and data block handling over the network.
User Datagram Protocol (UDP) for typical datagram applications in which
devices interact with other devices without maintaining a point-to-point
connection.
SMTP for email transmission.
Example: 00-20-4A-14-01-18
Table 7-5. Reserved Port Numbers
2: Introduction
on page 42.
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