1. Essentials Guide
  2. The Session Load Balancer and Route Manager
  3. The Sc Interface
  4. Sc Interface Messages
  5. Core Registration Messages

Core Registration Messages

The core registration exchange message sequence, CRR/CRA, is proprietary Diameter messaging that the Oracle Communications Core Session Manager uses to populate, refresh and update its participation within SLRM cores. This messaging is used in the following registration scenarios:

  • REGISTRATION — The Oracle Communications Core Session Manager sends the request to register the available cores to the SLRM. The registration refresh interval, which defaults to 60 seconds, is included in the Refresh-Interval AVP. If the registration is not refreshed and registration expires, then the SLRM considers that Oracle Communications Core Session Manager to be timed out.
  • DE-REGISTRATION — The Oracle Communications Core Session Manager sends this request to de-register a core on SLRM. Upon receipt, the SLRM removes the specified core for the Oracle Communications Core Session Manager and the Oracle Communications Core Session Manager is considered to be no longer serving the core.
  • RE-REGISTRATION — The Oracle Communications Core Session Manager sends this message to refresh and update the registration of its cores. Upon receipt, the SLRM resets the expiration time and updates the core information. This message is sent at the default interval of 60 seconds. Additional notes on re-registration include:
    • Changes to Core-Info do not affect existing cache entries.
    • The systems use new values for future registrations/transactions.

The Oracle Communications Core Session Manager specifies the registration scenario in the Registration Type AVP.