1. Essentials Guide
  2. Oracle USM Supporting the IMS Core
  3. Redundancy and Load Balancing with HSS Servers

Redundancy and Load Balancing with HSS Servers

The Oracle Communications Unified Session Manager allows you to operate with multiple HSS servers, supporting:

  • Redundancy - Continue normal operation despite HSS failure.
  • Load Balancing - Divide the traffic load between HSS servers in a group of HSSs. Preference is based on the HSS list order configured on the Oracle Communications Unified Session Manager.

You configure HSS servers within HSS Groups to support this functionality. For redundancy, you create and assign HSS groups, and apply either the hunt or fail-over strategy to your HSS group. To implement load balancing, you configure the applicable HSS group with a the round-robin server allocation strategy. This functionality assumes the HSS infrastructure itself is configured for redundancy.

The Oracle Communications Unified Session Manager establishes and manages multiple Cx connections with each applicable HSS. This management is achieved by connection identifiers on the Oracle Communications Unified Session Manager that allow it to distinguish between connections. This provides the network with the flexibility of being able to use multiple paths to a given HSS regardless of AVP values.