In this recipe, we will go through the steps to promote a standalone NSX Manager to primary and another to secondary. The rationale as to which site should be primary and which should be secondary typically aligns to the primary and disaster recovery data center designation. However, this rule does not mandate how to determine which side is primary and your reasoning may differ. It is important to choose which side is going to be primary with careful planning as this is where the local controller cluster will take the role of the UCC and therefore be a critical component of your Cross-vCenter NSX network topology.
In the following diagram, we have outlined our two vCenter environments and their corresponding NSX Managers. It is expected both have been deployed as per the steps highlighted in Chapter 1, Getting Started with VMware NSX for vSphere, and assume the role of standalone to begin with:
