Lantronix 10 manual ARP and Telnet

Getting Started

2.5 ARP and Telnet

The unit’s IP address must be configured before a network connection is available. You are able to ARP an address into a CoBox/UDS device even if there is already an address in the unit. If the unit has no IP address, you can use Address Resolution Protocol (ARP) method from UNIX and Windows-based systems to assign a temporary IP address. If you want to initially configure the unit through the network, follow these steps:

1.On a UNIX or Windows-based host, create an entry in the host's ARP table using the intended IP address and the hardware address of the unit, which is found on the product label on the bottom of the unit. Some UNIX hosts use colons “:” between hardware octets, and some use dashes “-“. All Windows hosts use dashes.

arp -s 191.12.3.77 00:20:4a:xx:xx:xx

Note: For the ARP command to work on Windows 95, the ARP table on the PC must have at least one IP address defined other than its own.

2.If you are using Windows 95, type ARP -A at the DOS command prompt to verify that there is at least one entry in the ARP table. If the local machine is the only entry, ping another IP address on your network to build a new entry in the ARP table; the IP address must be a host other than the machine on which you are working. Once there is at least one additional entry in the ARP table, use the following command to ARP an IP address to the unit:

arp -s 191.12.3.77 00-20-4a-xx-xx-xx

3.Open a Telnet connection to port 1. The connection will fail quickly, but the unit will temporarily change its IP address to the one designated in this step.

telnet 191.12.3.77 1

4.Finally, open a Telnet connection to port 9999, and press Enter within three seconds to go into Setup Mode. If you wait longer than three seconds, the unit will reboot and you will need to perform step 3 again.

telnet 191.12.3.77 9999

5. Set all required parameters

Note: The IP address you just set is temporary and will revert to the default value when the unit 's power is reset unless you log into the unit and store the changes permanently. Refer to the chapter on configuration for instructions on permanently configuring the IP address.

UDS-10 User Guide 2-11