Bug ID 453548: PEM: During failover, some session may not move completely to new active

Last Modified: Nov 07, 2022

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

Known Affected Versions:
11.4.0, 11.5.0, 11.5.1, 11.5.1 HF1, 11.5.1 HF10, 11.5.1 HF11, 11.5.1 HF2, 11.5.1 HF3, 11.5.1 HF4

Fixed In:
11.6.0, 11.5.1 HF5

Opened: Mar 22, 2014

Severity: 2-Critical


When there is a failover event, there might be chance that sessions may move partially over to new active blade.


for certain IPs which have failed to move to the new active, then a new session create request (radius/traffic) will not create/replace the current session as it is in inconsistent state. Also, policies will not be applied to traffic matching the IP of inconsistent session.





Fix Information

A new PEM session will be created and replace any old existing session in an inconsistent state due to fail-over.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips