The vSphere Replication Appliance (VRA) should be installed at the site where you have virtual machines that need to be protected. It may or may not be required to be installed on both the protected and recovery sites. You will need VRA to be deployed at the recovery site only if you intend to pair it with the protected site.

The pairing is done by adding the recovery site as a target site to the VRMS at the protected site. Read the Adding a remote site as a target section in Chapter 5, Configuring and Using vSphere Replication 6.1, for information on how to achieve this.

The total number of VMs that can be protected by vSphere Replication is 2,000 per site. The limit is imposed at a per VR server level. Each VR server can protect up to 200 VMs and there can only be a maximum of 10 VR server per VRMS. Since there can be only one VRMS registered to a site's vCenter, the 2,000 VM limit cannot be exceeded.

If the VRMSs are paired, then the cumulative...