Chris,
Please schedule downtime for ocg1001.eqiad.wmnet. When attempting to query its IPMI (which has been enabled by @Volans), it still returns:
robh@ocg1001:~$ sudo ipmi-chassis --get-chassis-status
ipmi_cmd_get_chassis_status: internal system error
Please schedule downtime, and then fully remove power to attempt to clear any bad state in the DRAC/iLOM. Once power is restored, confirm IPMI is enabled, and attempt to run the above command. If it still doesn't work, please attempt to update the firmware and reattempt.
Detail and if unsuccessful, please assign back to me. If successful, simply resolve.
Thanks!