1 person found this helpful
You should change the host name and IP address, modify the hosts file accordingly and then run adcfgclone on the apps tier to configure the application with the new host name.
These might help:
How to change hostname for E-Business Suite Release 12 on single node (Doc ID 1277556.1)
Correct Method of Changing the IP Address in 11i & R12 (Doc ID 751328.1)
E-Business Suite R12 Forms, OAFM, and Oacore Not Starting Up After IP Address Change (Doc ID 412980.1)