Most of the article stated that IMM default IP is 192.168.70.125 but it's not in my case. I try to figure out the IP because i want to access to IMM2 web interface to install key for Features On Demand (fod). In order to get the IP, i have downloded IBM Advanced Settings Utility (ASU) and unzip it into my C drive. Use command prompt to local ASU.exe or ASU64.exe.
type command asu64 show
It will shows many information but the first information will be displayed in the IP Address. You can to check on it quickly before it jump to the end. By the way, my IMM IP is 169.254.95.118.