A Federation environment contains a Global Manager and one or more Local Manager clusters.
![](images/GUID-765A55E9-4B28-48C7-B820-5A120D18A8A3-low.png)
In NSX-T Data Center 3.0.0, you install a single Global Manager appliance.
In NSX-T Data Center 3.0.1 and later, you install a cluster of three Global Manager appliances.