The customer requires high availability of its IBM Security Access Manager (ISAM) V9.0 WebSEAL infrastructure. The environment includes two WebSEAL appliances, two appliances for Policy Server and other ISAM services. All ISAM appliances are configured into a cluster which includes replicating the ISAM runtime and certificate files, the Policy Server, Runtime and Configuration databases, and the Distributed Session Cache. The complete LDAP configuration uses the embedded LDAP and externally federated IBM Security Directory Server (ISDS).
Which failover scenario is supported with this configuration?
A. The embedded LDAP on the WebSEAL appliances is available in read-only mode if the Primary Policy Server is unavailable
B. Policy Server failover is automatic without manual intervention and the WebSEALs automatically detect the new active Policy Server
C. An LDAP federation implies high availability therefore the external ISDS is always available with no additional configuration
D. Distributed Session Cache (DSC) failover requires manual intervention at which point the WebSEALs automatically detect the new active DSC.
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