High Availability
Oracle Communications Core Session Managers are deployed in pairs to deliver continuous high availability (HA) for interactive communication services. The HA design guarantees that no applicable traffic is dropped in the event of any single point failure. Furthermore, the Oracle Communications Core Session Manager HA design provides for full 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 Core Session Manager is the primary system, and is used to process signaling 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 Core Session Manager to become the active system.
The SLRM does not use HA to establish redundant operation. See the SLRM Description chapter for information on SLRM availability.