ESX Server 2.5.5: IPMI Service Must be Started Manually After Installation of IBM Director 5.20 Update 1

To start the IPMI service manually, running the following command as root in the console operating system:
#service ipmi start

To verify the service is started, run the following command:
#service ipmi status

The output should look similar to the following:
ipmi_msghandler module loaded.
ipmi_si_drv module loaded.
ipmi_devintf module loaded.
/dev/ipmi0 exists.

Configure the service to be automatically started after system reboots:
#chkconfig ipmi on