Bug ID 1043985: After editing an iRule, the execution order might change.

Last Modified: May 29, 2024

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

Known Affected Versions:,,,,, 14.1.5,,,,,, 15.1.0,,,,,, 15.1.1, 15.1.2,, 15.1.3,, 15.1.4,, 15.1.5,, 15.1.6,, 15.1.7, 15.1.8,,, 15.1.9,, 15.1.10,,,, 16.1.0, 16.1.1, 16.1.2,,, 16.1.3,,,,,, 16.1.4,,,

Opened: Sep 01, 2021

Severity: 3-Major


After modification, the iRule execution order may change for events with the same priority.


Unexpected behavior can cause virtual server malfunction.


Virtual server has an iRule that contains multiple events with the same priority.


Add desired priorities for iRules that contain the same event. For example: when <event_name> priority nnn

Fix Information


Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips