The System Manager Geographic Redundancy service replicates Avaya Aura® application support for two geographically distant System Manager sites with separate subnetworks and across a WAN. You can change the System Manager management services from one site to another when one of the sites or servers fails. System Manager Geographic Redundancy sites are set up in pairs. From the server pair, one server is designated as the primary System Manager server and the other server as the secondary System Manager server.