This section describes the PCF failover for the binding database query call flow.PCF Failover for Binding Database Query Call Flow
PCF Failover for Binding Database Query Call Flow Description
Step
Description
1
When a Gx session exists on PCRF and Rx AAA response is received, P-CSCF sends the Rx AAA request to the PCF Diameter endpoint.
2
For a local PCRF failure, the PCF Diameter endpoint checks if the session exists on local PCRF.
3
If the PCRF query times out due to the local PCRF failure or network issue, PCF reattempts sending the query to the remote PCRF instance.
4
If the session is not found, PCRF notifies the PCF Diameter endpoint.
5
If the PCF Diameter endpoint query times out due to the local PCF or PCRF failure or network issue, the PCF Diameter endpoint reattempts to check if the session exists in the local PCRF.