...
Carefully consider the NIOS appliance to which you connect the Infoblox IPAM Plug-In for VMware. To use the Cloud Network Automation feature, you can connect to the Grid Master (if it is using the Cloud Network Automation license) or to a designated Cloud Platform Appliance (with the correct licensing) as necessary for your deployment. For more information, see the chapter Deploying Cloud Network Automation in the Infoblox NIOS Administrator GuideDocumentation.
See the table below for information on which API to use (WAPI or Cloud API) to support Cloud Network Automation and what connection options are supported.
...