ESXi host disconnects intermittently from vCenter Server

we should be able to increase the timeout  for esxi in config.

vSphere Web Client:

 

Open the vSphere Web Client and connect to the vCenter Server.

In the vSphere Web Client, navigate to the vCenter Server instance.

Select the Manage tab.

Select Advanced Settings.

Click Edit.

In the Key field, type:

config.vpxd.heartbeat.notRespondingTimeout

 

In the Value field, type:

120

 

Click Add.

Click OK.

Run this command to restart the vCenter Server service:

vCenter Server Appliance 6.x: service-control --stop vmware-vpxd; service-control --start vmware-vpxd