Lantronix UDS2100 manual Alternative Ways to Assign an IP Address, AutoIP

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A: Alternative Ways to Assign an IP Address

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: This DHCP address does not appear in the unit’s Setup Mode or in 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 and issue the NC (Network Communication) command, you 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 obtain an IP address automatically 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.

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.

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: If a DHCP server is found, but it denies the request for an IP address, 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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Contents UDS2100 User Guide Copyright & Trademark ContactsRevisions Date Rev CommentsContents Setup Mode Server Configuration Warranty Figures TablesUsing This Guide Purpose and AudienceChapter Summary Chapter DescriptionAdditional Documentation DocumentApplications IntroductionApplication Examples Introduction Configuration Methods Additional FeaturesProtocol Support Product Information Label Sample Hardware Address 00-20-4A-14-01-18 or 00204A140118Package Contents Getting StartedInstalling the UDS To install the unitRequired Information Hardware AddressIP Address IP Address Subnet Mask GatewayAssigning the IP Address DeviceInstaller Installing DeviceInstallerAssigning an IP Address Select Assign a specific IP address and click NextAccessing the UDS2100 Using DeviceInstaller Viewing the Current ConfigurationTo view the units current settings Adding the Unit to the Manage ListSetting Getting StartedNext Step To configure the unit using a Telnet sessionPress Enter within 5 seconds Assigning the IP Address Serial Port Login Configuration Using Web Manager Accessing UDS2100 Using DeviceInstallerNetwork Configuration Lantronix Web ManagerTo assign an IP address automatically Automatic IP Address ConfigurationSelect Obtain IP address automatically Static IP Address Configuration Ethernet ConfigurationSelect Use the following IP configuration To assign an IP address manuallyServer Configuration To configure the UDS2100’s device server settingsServer Configuration AdvancedHost List Configuration To configure the host listChannel 1 and Channel 2 Configuration Serial SettingsRetry Settings Host InformationPort Settings ChannelPack Control Flush Input Buffer Serial to NetworkTo configure a channel’s TCP settings Connection Settings TCPFlush Output Buffer Network to Serial Connect Mode Passive Connection Connect Mode Active ConnectionEndpoint Configuration Connect ProtocolDisconnect Mode Common OptionsTo configure a channel’s UDP settings Connection Settings UDPDatagram Mode Apply Settings Apply Factory DefaultsAccessing Setup Mode Configuration via Telnet or Serial Port Setup ModeTelnet Connection Serial Port Connection To establish a Telnet connectionExiting Setup Mode To exit setup modeSetup Mode Server Configuration Server Configuration OptionIP Address Set Gateway IP AddressChange Telnet Configuration Password Netmask Number of Bits for Host PartDhcp Name Network Class Host Bits NetmaskSetup Mode Server Configuration Channel 1 Option Setup Mode Channel ConfigurationBaudrate Interface Mode Mode OptionCommon I/F Mode Setting Binary FlowConnect Mode Port NumberFlow Control Option Hex Port Numbers Reserved forConnect Mode Option Response Incoming ConnectionActive Startup Manual Connection Address Example To enable the hostlist Datagram TypeModem Mode MessageMeaning No CarrierModem Mode Function Command Send the Escape Sequence +++ in Modem ModeAuto Increment Source Port Disconnect Mode Option Remote IP AddressRemote Port DisConnModeFlush Mode Buffer Flushing Pack ControlPacking Interval Trailing CharactersSend Characters OptionDisConnTime Inactivity Timeout Channel Port PasswordSend Characters Telnet Terminal TypeExpert Settings Option Setup Mode Advanced SettingsTCP Keepalive time in seconds ARP Cache timeout in seconds Disable Monitor Mode at bootupEnable alternate MAC Http Port NumberSecurity Settings Option Disable SnmpDisable Telnet Setup Snmp Community NameDisable Tftp Firmware Update Disable Port 77FE HexDisable Web Server Disable Web SetupDefault Settings Option Channel 1 and Channel 2 Configuration DefaultsExpert Settings Defaults Security Settings DefaultsSetup Mode Advanced Settings Firmware Upgrades Using Tftp Graphical User InterfaceObtaining Firmware Reloading Firmware ROM FileUsing Tftp Command Line Interface To recover firmwareFirmware Upgrades Monitor Mode Entering Monitor Mode Using the Serial PortEntering Monitor Mode Using the Network Port Monitor Mode CommandsCommand Command Name Function Response MeaningTroubleshooting and Contact Information LEDsDiagnostic, Power, and Serial Port LEDs UDS2100 LEDs LEDs MeaningProblems and Error Messages Problem/Message Reason SolutionProblem/Message Reason Solution Technical Support Technical Support Europe, Middle East, and AfricaConnections and Pinouts Serial Connector PinoutsUDS2100 Serial Ports Reset Button Ethernet Connector Pinouts Power PlugTo reset the unit to factory defaults Network PortTechnical Specifications Category DescriptionCategory Description Transient over voltages Alternative Ways to Assign an IP Address AutoIPARP and Telnet To assign a temporary IP addressConversion Table Converting Binary to HexadecimalDecimal Binary Hex Scientific Calculator Warranty Compliance and Disclaimer Disclaimer and Supplementary Information Index

UDS2100 specifications

The Lantronix UDS2100 is a versatile device server designed to facilitate connections between serial devices and Ethernet networks. This innovative product acts as a bridge, allowing for seamless communication between legacy serial devices and modern IP-based systems. Its importance has grown, particularly in industries that still rely on serial technology but seek to integrate with contemporary IT infrastructures.

One of the main features of the UDS2100 is its ability to connect up to two serial devices simultaneously. This dual-port capability makes it an efficient solution for environments where multiple devices need to be networked without additional complexity. By enabling these connections, the UDS2100 allows for remote control and monitoring of various equipment, leading to increased operational efficiency.

The device supports a variety of communication protocols, including TCP/IP, UDP, and HTTP, ensuring compatibility with a broad range of applications. This flexibility is complemented by the UDS2100’s support for both standard and custom baud rates, making it adaptable to various serial device configurations. Users can configure the device via a web-based interface, simplifying the setup process and enhancing user experience.

In terms of security, the Lantronix UDS2100 is equipped with numerous features to protect data transmission over the network. These include support for Secure Sockets Layer (SSL) and Transport Layer Security (TLS), which encrypt the data being transmitted, ensuring that sensitive information remains protected from potential threats.

The UDS2100 also features robust diagnostic capabilities, offering real-time monitoring and logging of connections. This allows users to troubleshoot issues efficiently and maintain optimal performance of their connected devices. Moreover, the device supports multiple networking protocols, including DHCP and static IP addressing, providing further flexibility in network management.

With its compact design and robust enclosure, the UDS2100 can be easily integrated into existing systems without requiring significant modifications. Its reliability and performance make it suitable for various applications, including manufacturing, telecommunications, and medical devices. Overall, the Lantronix UDS2100 stands out as a reliable solution for businesses looking to modernize their infrastructure while maintaining compatibility with legacy equipment.
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