I am getting ready to upgrade CUCM/Unity/UCCX from 11.5 to 12.5 and know that I need to upgrade my ESXi from v6.0 to 6.5u2 or higher. We are planning to upgrade it to ESXi 6.7 u3. Here's what I'm currently running:
UCS-C240-M4SX on Firmware (CIMC) 3.0(1c)
ESXi v6.0
I was planning on upgrading the firmware to 3.0(3a) then stepping up to 4.0(2o) as per the upgrade path matrix.
After I do this do I also need to upgrade the UCS Drivers to 4.0(2something) and the UCS Utilities to 3.1(3)?
In the past I've done CIMC/Firmware upgrades but I never updated the UCS Drivers or Utilities.
Any advice you can give would be appreciated!!