ESXi 5.5 for 800xA 5.1
Third party document mentions ESXi 5.1 for 800xA 5.1 and ESXi 5.5 for 800xA 6.0.
But what if customer wants to use ESXi 5.5 for 800xA 5.1. ESXi 5.1 is old and customers would like to have latest versions. What stops 800xA 5.1 on ESXi 5.5 other than the reason it is not tested.
Would like to know if someone is already using this and are there any known issues with this "not-supported" combination.
Voted best answer
Probably just a testing issue.
Network drivers (E1000 is prefered over VMXNET in 5.1 but not in 6.0 where the opposite is recommended) have been an issue in the past. So don't "go large" before you have tested it properly first.
PNSM Assets may differ (but is "versionfree" at ABB Library).
However, in some (older) version traps replaced SNMP polling and trap service came late in 5.1 (hence, too new ESX may prevent proper supervision if xA version is too old).