Bug ID 525633: Configurable behavior if PCRF returns unknown session ID in middle of session.

Last Modified: Sep 13, 2023

Affected Product(s):
BIG-IP PEM(all modules)

Known Affected Versions:
11.5.1 HF1, 11.5.1 HF2, 11.5.1 HF3, 11.5.1 HF4, 11.5.1 HF5, 11.5.1 HF6, 11.5.1 HF7, 11.5.1 HF8, 11.5.1 HF9, 11.5.1 HF10, 11.5.1 HF11, 11.5.2 HF1, 11.5.3 HF1, 11.5.3 HF2, 11.5.4 HF1, 11.5.4 HF2, 11.5.4 HF3, 11.5.4 HF4, 12.1.0 HF1, 12.1.0 HF2, 12.1.1 HF1, 12.1.1 HF2, 12.1.2 HF1, 12.1.2 HF2

Fixed In:
12.1.0, 12.0.0 HF1, 12.0.0, 11.6.0 HF6

Opened: May 28, 2015

Severity: 3-Major

Related Article: K02093894


If PEM sends CCR-U, and PCRF responds with CCA-U (PCRF lost session), PEM ignores the response and sends CCR-U.


Session remains for a long period of time with PCRF not acknowledging.


PCRF lost session (reboot/failover) and responds to session update requests with unknown session ID.


To enable PCRF can get the context back, it is recommended that you delete the session on the PEM end (configurable), and also recreate the same session (configurable). When PCRF indicates that the session ID unknown, set the following Sys db variable to TRUE to have PEM delete the session: tmm.pem.diameter.application.trigger.delete.onPeer.failure. To have PEM recreate the session, set the following Sys db variable to TRUE: tmm.pem.session.ppe.recreate.afterPeerFailure.

Fix Information

PCRF no longer returns unknown session ID in middle of session.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips