The Diameter stack used by the Mobicents JAIN SLEE Diameter CCA Resource Adaptor supports application session failover, with specific session state being replicated, thus only available for Application sessions. Failover of application activities is transparent to SLEE applications. This means that SLEE applications must be in charge of properly adapting its state machine to recover generic session on node failure.

Currently, the only available balancing mechanism is provided by Diameter stack. It depends on RFC 3588 algorithm to select one peer from realm serving the desired application.