I am going to upgrade Esxi version 5.5 to 6.7 and it is hosted on hardware "USC-E160D-M2/K9", do I need to upgrade CIMC & BIOS versions too.
Current CIMC version is 2.3(3.20150122164050)
BIOS version UCSED.220.127.116.11 (Build Date: 05/05/2014)
CUCM version: 18.104.22.16800-11
I want to upgrade esxi because CUCM version 12.5.1 is not supported, latest available versions of CIMC & BIOS are downloaded, please advise.
Also would like to know the best method of approach.
I would also recommend you to have a look at this link https://ucshcltool.cloudapps.cisco.com/public/
It should show you the information for recommended versions for your hardware and software combination.