UDS100-B Lantronix, UDS100-B Datasheet - Page 57

• Manufacturer Part Number: UDS100-B
• Description: Ethernet Modules & Development Tools Single Port
• Manufacturer: Lantronix
• Type: Serial to Ethernetr

Specifications of UDS100-B

• Data Rate: 300 bps to 115.2 Kbps
• Product: Modules
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

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Earlier chapters describe how to assign a static IP address using DeviceInstaller,
Web Manager, and Setup Mode (through a Telnet or serial connection). This section
covers other methods for assigning an IP address over the network.
DHCP
The unit ships with a default IP address of 0.0.0.0, which automatically enables
DHCP. If a DHCP server exists on the network, it provides the unit with an
IP address, gateway address, and subnet mask when the unit boots up.
You can use the DeviceInstaller software to search the network for the DHCP-
assigned IP address and add it to the list of devices retrieved.
Note:
Web Manager. You can determine your unit’s DHCP-assigned IP address in
Monitor Mode. When you enter Monitor Mode from the serial port with
network connection enabled (see
Port
see the unit’s IP configuration.
AutoIP
The unit ships with a default IP address of 0.0.0.0, which automatically enables
Auto IP within the unit. AutoIP is an alternative to DHCP that allows hosts to
automatically obtain an IP address in smaller networks that may not have a DHCP
server. A range of IP addresses (from 169.254.0.1 to 169.254.255.1) has been
explicitly reserved for AutoIP-enabled devices. Do not use this range of Auto IP
addresses over the Internet.
AutoIP does not replace DHCP. The unit continues to look for a DHCP server on the
network. If it finds a DHCP server, the unit switches to the DHCP server-provided
address and reboots.
Note:
the unit does not attach to the network, but waits and retries.
AutoIP can be disabled by setting the unit’s IP address to 0.0.1.0. This setting
enables DHCP but disables AutoIP.
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on page 43) and issue the NC (Network Communication) command, you
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This DHCP address does not appear in the unit’s Setup Mode or in
If a DHCP server is found, but it denies the request for an IP address,
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If your unit cannot find a DHCP server, and you have not manually assigned
an IP address to it, the unit automatically selects an address from the AutoIP
reserved range. Then, your unit sends out a (ARP) request to other nodes on
the same network to see whether the selected address is being used.
If the selected address is not in use, then the unit uses it for local subnet
communication. 
If another device is using the selected IP address, the unit selects another
address from the AutoIP range and reboots. After reboot, the unit sends out
another ARP request to see if the selected address is in use, and so on.
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Entering Monitor Mode Using the Serial
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