This configuration overview describes active/passive high availability within a cluster and disaster recovery between two sites. In an active/passive configuration, one or more application virtual servers can exist in a cluster, but each server must be managed by a service group configured with a distinct set of nodes in the cluster.

Active/passive clusters involve one-to-one failover capabilities. For instance, if you have two nodes on each site (SYSTEM1 and SYSTEM2 on the primary site, SYSTEM5 and SYSTEM6 on the secondary site), then SYSTEM1 can fail over to SYSTEM2, and SYSTEM5 can fail over to SYSTEM6. The figure that follows illustrates the cluster configuration on the primary site.

For a view of the DR configuration that includes both sites:

See About a disaster recovery solution.