Use Diagnostics for VMware Cloud Foundation to monitor ESXi hosts that are not in maintenance mode and are reported as not responding state in a vCenter instance.
This report helps you identify hosts that unexpectedly become unresponsive.
The ESXi Host Availability dashboard provides lists and counts of unresponsive, in maintenance mode, powered-off and unknown states of the hosts.
For more information, see the ESXi Host Availability Dashboard topic in the Configuring VMware Aria Operations guide.