You can use the Oracle ILOM web interface to remotely power off the server to standby power mode.
Before You Begin
To log in, open a web browser and direct it using the IP address of the server SP. Log in as root or a user with administrator privileges. See Accessing Oracle ILOM in Oracle X4 Series Servers Administration Guide.
The Summary screen appears.
If the Power State status shows off, the server is already powered off.
The power, as indicated in the Actions section, changes from on to off. In this state the server is in standby power mode.
Alternatively, other power off options are available in the Host Management > Power Control screen.