Data transmission in a udp slave(server) mode, 4 assigning new ip address with arp commands, Fig. 32 – Atop Technology SE5002 User manual User Manual

Page 28: Fig. 33

User manual Version 1.3

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Ethernet Serial Server SE5002

Slave (Server) Mode：To establish a connection using unicast or broadcast data

from one or multiple

host computer to a serial device.(Fig. 32)
Notes：The configuration is limited by the Local Listening Port (For example, on the SE5002 listening the port
is 4660 which receives data from the Host Computer).

HUB

TCP/IP Network

Host Computer #1

IP: 192.168.1.3

Destination IP 192.168.1.1

Destination Port 4660

Host Computer#2
IP: 192.168.1.100

Destination IP 192.168.1.1

Destination Port 4660

Host Computer #3

IP: 192.168.1.200

Destination IP 192.168.1.1

Destination Port 4660

Host Computer #4

IP: 192.168.1.254

Destination IP 192.168.1.1

Destination Port 4660

Serial Device 1

Serial Line

SE5002

IP 192.168.1.1

Listening port 4660

UDP datagram

Fig. 32. Data Transmission in a UDP Slave(server) Mode

3.4 Assigning new IP Address with ARP commands

ARP (address resolution protocol) commands can be used to assign a static IP address on SE5002 using
its hardware MAC (media access control) address. The MAC address"0060E9-xxxxxx" is printed on the rear
side of device . The following shows how it works on MS-DOS command prompt window.
Example: change IP from 10.0.50.100 to 10.0.50.101,and MAC address being 00-60-e9-11-11-01

Step1: Add the new host IP to the ARP table
Î Open Ms-DOS command prompt window
Î Input

arp -s 10.0.50.101 00-60-E9-11-11-01(Fig. 33)

Fig. 33. Ms-DOS command prompt window: add host computer IP to ARP table

Step2: Change to the new IP via Telnet port 1(Fig. 34)
Î Input telnet 10.0.50.101 1
Note：Telnet will fail and then SE5002 restarts automatically. Afterward, the new IP address is changed to

10.0.50.101

Step3: Using the new IP to configure SE5002 via Telnet
Î Input telnet 10.0.50.101
Note:
1. Both PC's IP and SE5002 's IP must belong to the same subnet.
2. The changed IP address must be legal; otherwise it will change back to the default value (10.0.50.100)

after restart.