Kerberos clustering for Web services
Clusters are groups of servers that are managed together and participate in workload management.
In a clustered environment, the Kerberos token needs to be distributed and recoverable. The Web services security configuration saves and distributes Kerberos tokens among the cluster members. The Kerberos tokens that are created or validated in one server are available to the other cluster members. The distributed cache or database repository need to be configured as the caching mechanism.
 
Related concepts
Kerberos token
Related
Security cache settings 
Related information
Kerberos Token Profile V1.1 specification
Kerberos Token Profile 1.1 Approved Errata