Hello, and welcome to Digi Support Forum
There are few different ways to assign IP address via Ethernet port
1. By default, Digi One IAP is a DHCP client. Reset device to the factory defaults and place it on the DHCP network
2. Reset device to the factory defaults. Make sure PC has a static IP assigned to it, firewall and anti virus disabled(great majority of the problem is related to this) and run Digi device discovery tool
3. Use reverse arp
from the command line
arp -s 192.168.1.100 00-40-94-12-34-56
ping 192.168.2.100
Please use actual IP address and MAC address
Thank you,
Michael,
Digi Tech Support