Each cross-vCenter NSX environment has one universal controller cluster associated with the primary NSX Manager. Secondary NSX Managers do not have a controller cluster.

As the universal controller cluster is the only controller cluster for the cross-vCenter NSX environment, it maintains information about universal logical switches and universal logical routers as well as logical switches and logical routers that are local to a vCenter NSX pair.

In order to avoid any overlap in object IDs, separate ID pools are maintained for universal objects and local objects.