In a typical vSphere Replication installation, the source site provides business-critical datacenter 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 room 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® configurations at each site:
Each site must have at least one datacenter.
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.
Connecting Source and Target Sites
Before you replicate virtual machines between two sites, you must connect the sites. If the sites use different SSO, you must provide authentication details for the target site, including IP or FQDN , user and password information. When connecting sites, users at both sites must have Target Sites tab.privilege. When you connect sites that are part of the same SSO, you need to select the target site only without providing authentication details, as you are already logged in. After connecting the sites, you can monitor the connectivity state between them at