High Availability

Oracle Communications Unified Session Managers are deployed in pairs to deliver continuous high availability (HA) for interactive communication services. The HA design guarantees that no stable calls are dropped in the event of any single point failure. Furthermore, the Oracle Communications Unified Session Manager HA design provides for full media, registration, call and service state to be shared across an HA node. The solution uses a VRRP-like design, where the two systems share a virtual MAC address and virtual IPv4 address for seamless switchovers.

In the HA pair, one Oracle Communications Unified Session Manager is the primary system, and is used to process signaling and media traffic. The backup system remains fully synchronized with the primary system’s session status. The primary system continuously monitors itself for connectivity and internal process health. If it detects service-disrupting conditions or degraded service levels, it will alert the backup Oracle Communications Unified Session Manager to become the active system.