(lack of) progress:
SM support:
Thank you for contacting Super Micro Technical Support!
Unfortunately, we are NOT able to provide the detail of I2C design information to the customer according to our IPMI support team. Thank you for your understanding!
Have a great day!
lol
and the SMCIPMITool tcpdump was a bust. the newer versions of ipmi-over-lan are encrypted.
update:
it’s not really what i wanted since it still needs to go through the BMC NIC, but instead of using SMCIPMITool, i can at least use the redfish api to get this info:
curl -sS https://${BMC_HOST}/redfish/v1/Chassis/1/Power/ -k -u ${BMC_USER}:${BMC_PASS}
this gives json back