The set-system-state ACLI command provides the ability to temporarily place a clustered OCSBC in the offline state. The offline setting puts the OCSBC into a state where it is powered on and available only for administrative purposes.

The transition to the offline state is graceful in that existing calls are not affected by the state transition. The OCSBC informs the Oracle Communications Subscriber-Aware Load Balancer (SLB) of the impending status change via a CCP message. Upon receiving such a message, the SLB ceases to forward new endpoints to the OCSBC, and places the OCSBC in the Shutdown state. The OCSBC, for its part, enters a state that results in the rejection of any incoming out-of-dialog SIP requests. Eventually all calls compete, registrations expire and are removed by the SLB, and returning endpoints are allotted to active OCSBCs.

Use the set-system-state offline ACLI command to place an OCSBC in the offline state.

ORACLE# set-system-state offline
Are you sure you want to bring the system offline? [y/n]?: y
Setting system state to going-offline, process will complete when all current calls have completed
ORACLE#

In a similar fashion use the set-system-state online ACLI command to place an OCSBC in the online state.

ORACLE# set-system-state online
Are you sure you want to bring the system online? [y/n]?: y
Setting system state to online
ORACLE#