NSX Manager and vCenter Server have a one-to-one relationship. This design uses one vCenter Server instance and one NSX instance connected to it.
Table 1. NSX for vSphere Design Decisions

Decision ID

Design Decision

Design Justification

Design Implications

CSDDC-VI-SDN-001

Use one NSX instance.

Software-defined networking (SDN) capabilities offered by NSX, such as load balancing and firewalls, are crucial for the compute/edge layer to support the cloud management platform operations, and also for the management applications in the management stack that need these capabilities.

None.

Figure 1. Architecture of NSX for vSphere