1. Measurement Reference Guide
  2. Policy DRA Error Resolution Procedures
  3. Error Code 521

A.14 Error Code 521

Associated Error Category
SBR Error
Description
SBR Error - maximum number of Sessions per Binding is Exceeded that fails the binding creation for given IMSI of MSISDN key.
Associated P-DRA Alarm/Event
Event 22719 - Maximum Number of Sessions per Binding Exceeded (refer to the DSR Alarms and KPIs Reference for details about this event)
Associated Measurement
TxPdraAnswersGeneratedForPsbrErrResp
Associated Diameter Interface / Message Type
Gx CCR-I, CCR-U, and CCR-T
GUI Configurable

Recovery

  1. Check findOrCreateBindingResult Processing and findOrCreateBinding Response Processing with PCRF Pool in the Error Resolution appendix of the Policy and Charging Application User Guide to investigate and understand the circumstances where the error occurs.
  2. Check the Main Menu, and then Alarms & Events, and then View History and set the Display Filter by Events (in particular, 22719 - Maximum Number of Sessions per Binding Exceeded).
  3. Go to PCA NOAM GUI at Main Menu, and then Policy and Charging, and then Maintenance, and then Policy Database Query by using Event 22719 - Maximum Number of Sessions per Binding Exceeded to get all the information about session, including session-ids and PCEF FQDNs, to determine if the session is valid.
  4. If the sessions exist in the Policy DRA, but not on the PCEF(s), contact unresolvable-reference.html#GUID-F069C6FD-5BA3-4F31-AE9E-A187D5B5F729 for assistance.