In a typical vSphere Replication installation, the source site provides business-critical data center services. The target site is an alternative facility to which you can migrate these services.

The source site can be any site where vCenter Server supports a critical business need. The target site can be in another location, or in the same facility to establish redundancy. The target site is usually located in a facility that is unlikely to be affected by environmental, infrastructure, or other disturbances that might affect the source site.

vSphere Replication has the following requirements for the vSphere® environments at each site:

Each site must have at least one data center.

The target site must have hardware, network, and storage resources that can support the same virtual machines and workloads as the source site.

The sites must be connected by a reliable IP network.

The target site must have access to networks (public and private) comparable to those on the source site, although not necessarily the same range of network addresses.

Before you replicate virtual machines between two sites, you must connect the sites. When connecting sites, users at both sites must have the VRM remote.Manage VRM privilege assigned.

When you connect sites that are part of the same SSO domain, you need to select the target site only, without providing authentication details, because you are already logged in.

When you connect sites that belong to different SSO domains, the vSphere Replication Management Server must register with the Platform Services Controller (PSC) on the target site. You must provide authentication details for the target site, including IP or FQDN of the server where PSC runs, and user credentials. See Configure vSphere Replication Connections.

After connecting the sites, you can monitor the connectivity state between them on the Target Sites tab.