In Linux operating system, check IPMI IP through ipmitool lan print 1 command, as in picture 1.
Instruction: when inquiring IP command, make sure that OS has installed ipmitool packet and loading ipmitool drivers correctly. Here is the way of loading drivers:
Picture 1 IPMI IP address inquiry interface
In other OS, reboot devices, press DEL into system BIOS, IP address is displayed in IP address column of IPMIBoot interface, as in picture 2:
Picture 2 BIOS interface