Such issues may occur if the management vmkernel adapter is sharing the physical nic with a service that is stealing all the bandwidth such as vMotion, backup or similar. Please check if this may be the issue in your environment.
Thanks for the response.
I've reviewed this, and the only service that it's sharing is the management service with vmnic0.
If you are ensured about a special VM resource usage such as your DC, limit it's CPU/Memory via resource pool setupPlease mark my comment as the Correct Answer if this solution resolved your problem
That's something I will try.
Regardless, even if the VM's CPU is spiking, it shouldn't cause the host to become unreachable from the vCenter service appliance, right? It also shouldn't cause all of the VMs to go to a disconnected state.
normally yes, you shouldn't see such this situation, whenever a VM demands more CPU usage ...
Does this occur always? most of times? or in higher peaks?
Please monitor your CPU usage metrics with more detail after reading the following link:Please mark my comment as the Correct Answer if this solution resolved your problem