This section describes Core HA failover scenarios, with FusionSync.

HA replication in normal state shows the Core configured for HA at Data Center A that is replicating to Data Center B. Both nodes of the active-active HA cluster are operational and replicating different LUNs to their peers.

Core HA Failover on primary data center shows how HA failover at Data Center A is affecting replication. Core Y has failed and Core X took over responsibility for servicing Core Y LUN(s) to Edges, and Core X is replicating the LUN(s) to Core Y' at the same time as continuing to replicate to Core X’ for its own LUNs.

Core HA failover on secondary data center shows how HA failover at Data Center B is affecting replication. Core Y’ has failed and Core X’ takes over responsibility of the replication target and accepting replication from Core Y and continuing to accept replication traffic from Core X.

Core HA failover on primary and secondary data centers shows how HA failover on both sites is affecting replication. After Core Y and Core Y’ fail, Core X assumes the role of replication source and Core X’ assumes the role of replication target.