1. Essentials Guide
  2. The Session Load Balancer and Route Manager
  3. Functional Overview
  4. Physical Deployment

Physical Deployment

The SLRM is typically deployed in an High Availability (HA) configuration, which includes multiple Oracle Communications Core Session Managers operating redundantly as SLRMs. There are no limitations to the number of platforms deployed as SLRMs or the number of devices with which they interoperate.

An SLRM typically resides between the network’s P-CSCFs (usually Oracle SBCs) and S-CSCFs, load balancing initial registrations from the P-CSCF and INVITEs from a variety of sources. P-CSCFs send registrations. Devices from which the SLRM may receive these INVITEs include:

  • AS
  • BGCF
  • MGCF

The SLRM may also receive traffic that it does not load balance. This includes traffic for which the target S-CSCF is already known. In these cases, the I-CSCF follows 3GPP standards for operational behavior.