It looks like you are possibly hitting (internal) known issue:CSCwv07938 - C880A-M8 : BGA Status Begins Rebuilding After OS Installation on M.2 VD Controller in RAID 1 Mode ConfigurationPlease open a TAC case for investigation and resolution.

There are literal dozens of CIMC CDETS which can cause CIMC to reboot. I have a list, but won't bore you.Are you running the latest/starred version of CIMC? If not, then I would suggest upgrade and monitor.You ask specifically about I2C, but I don't ...

https://www.cisco.com/c/en/us/td/docs/unified_computing/ucs/c/hw/c240m8/install/b-cisco-ucs-c240-m8-install/m-servicing.html#concept_gs1_ndj_mzWhat physical port are you connecting to?What configuration did you set in CIMC(Dedicated/Shared LOM/Cisco ...

"Supported". No! As in QA tested and validated and should work.Will it work? Maybe.If you set the UCS FI ports the HP servers are connected to as Appliance port, then anything connected to it should "just work".Since the two UCS FIs are distinct swit...

That setup should work just fine as I don't see any obvious gotcha's.Let us know how your deployment goes.