Supported VMware Versions
Cisco ISE supports the following VMware servers and clients:
VMware version 8 (default) for ESXi 5.x
If you are installing Cisco ISE on an ESXi 5.x server, to support RHEL 7 as the Guest OS, update the VMware hardware version to 9 or later. RHEL 7 is supported with VMware hardware version 9 and later.
VMware version 11 (default) for ESXi 6.x