You can configure the secondary site as the preferred site. The current preferred site becomes the secondary site.
- Navigate to the Virtual SAN cluster in the vSphere Web Client.
- Click the Configure tab.
- Under vSAN, click Fault Domains and Stretched Cluster.
- Select the secondary fault domain and click the Mark Fault Domain as preferred for Stretched Cluster icon ().
- Click Yes to confirm.
The selected fault domain is marked as the preferred fault domain.