Since the vSphere environment strongly relies on DNS, before configuring the vCenter Server, make sure that the name resolution is working correctly in your network.
Verify that the vCenter Server can resolve ESXi hostnames added to the inventory and that the added ESXi hosts can resolve the vCenter Server hostnames used to manage them. Ensure that all the hypervisors added to vCenter can resolve the hostnames of other ESXi hosts.
To add ESXi hosts to vCenter Server, follow these steps:
- From the vSphere Client, log in to the vCenter Server.
- In the Hosts and Clusters view, right-click on the configured data center object and select the Add Host option.
- Enter the ESXi hostname or IP address and click Next ...
