Error Code 511

Associated Error Category: Binding Found But Unable To Route

Description: A slave session could not be routed because, on polling the master, sessionRef was no longer in the binding database.

Associated P-DRA Alarm/Event: N/A

Associated Measurement: SbrSlavePollingFail

Associated Diameter Interface / Message Type:

GUI Configurable: Yes

Recovery:

See Early binding Processing with PCRF Pool in the Error Resolution appendix of the Policy DRA User Guide to investigate and understand the circumstances where the error occurs.
Go to the P-DRA SOAM GUI at Main Menu > Status & Manage > Server to check binding SBRs' status.
Get the measurement report from Main Menu > Measurements > Report to the frequency of the relevant measurements. Select, but not limited to, "SBR Binding Exception" Measurement Group to determine the frequency of the relevant measurements.