• Oracle Data Guard must be installed and configured on the Oracle RDBMS instances at each site, such that one site is Primary and the other site(s) are Standby. See the “Getting Started with Oracle Data Guard” chapter of Oracle Data Guard Concepts and Administration. Make sure that the fast recovery area on all database instances in the Oracle Data Guard configuration are configured with enough space to cover worst case gap in applying archive logs to the standby database(s). This is the db_recovery_file_dest_size system property.

• Oracle Flashback Database must be enabled in Oracle RDBMS at all sites.

• A database user with the SYSDG privilege must be available.

• Site-specific parameters in CES_PARAMETERS must be configured for each NMS site. See Chapter 7 - Environment Configuration and the System Installation chapter of the Oracle Utilities Network Management System Installation Guide.

• SSH password-less login must be enabled between the NMS servers on each site.

• nms-wls-config must be run in each environment to configure starting/stopping the WebLogic managed servers. See the Starting and Stopping Services for more information.