Before you begin
WebLogic Server provides the ability to replicate HTTP session state across multiple clusters. This improves high-availability and fault tolerance by allowing clusters to be spread across multiple geographic regions, power grids, and internet service providers. WebLogic Server allows you to implement cross-cluster replication with a Metropolitan Area Network (MAN) or Wide Area Network (WAN) depending on your requirements and network configuration.
Before configuring cross-cluster replication using the Administration Console, you must set up your network environment, including hardware load balancers, WebLogic Server instances and clusters. If you are using cross-cluster replication within a WAN environment, you must also create and configure a data source. For more information, see Configuration Requirements for Cross-Cluster Replication in Using WebLogic Server Clusters.
Note: Both of these settings should be configured so that communication between the primary and secondary cluster are not routed through the hardware load balancers.