Adjust as needed but noting the syntax as I can never seem to get it right at 3:00 AM.

To Reboot:
ipmitool -I lan -H 192.168.100.xxx -U root -P password power cycle

To Activate a console: IPMI 2.0
ipmitool -I lanplus -H 192.168.100.xxx -U root -P password sol activate

To Activate a console: IPMI 1.5
ipmitool -I lan -H 192.168.100.xxx -U root -P password isol activate

Thanks
Robert