1. Essentials Guide
  2. The Session Load Balancer and Route Manager
  3. Functional Overview
  4. Logical Deployment
  5. SLRM Core

SLRM Core

An SLRM core is a required configuration that establishes a group of Oracle Communications Core Session Managers to which an SLRM load balances registrations and applicable INVITEs. The user configures cores to equate to Oracle Communications Core Session Manager SIP registrars, which service the associated set of domains at the HSS. An SLRM's core configuration includes a list of domains, that must match those of the target registrars. Although the original REGISTER or INVITE is sent by a device that is unaware of core configuration, the REGISTER or INVITE does include target domain. The SLRM recognizes the target domain and, based on the core configuration, associates the message with the applicable core.

The Oracle Communications Core Session Manager includes a core configuration within each sip-registrar that it advertises to the SLRM. Core names must be the same on the SLRM and the Oracle Communications Core Session Managers. Based on this advertisement, the SLRM groups Oracle Communications Core Session Managers that service the same set of domains for load balancing.

This image depicts the SLRM load balancing to a single core.

The SLRM supports any number of cores. In the diagram below, the SLRM services both Core1 and Core2. There are 2 Oracle Communications Core Session Managers for each core. The SLRM load balances registrations from P-CSCFs for Core1 between the Oracle Communications Core Session Managers at the top of the diagram and those for Core2 between the bottom.

This image depicts the SLRM load balancing to two cores.

You create core configurations on both the SLRM and all applicable Oracle Communications Core Session Managers.