Bug ID 569195: A Set-Cookie for an existing ASM cookie without value change

Last Modified: Oct 06, 2020

Bug Tracker

Affected Product:  See more info
BIG-IP ASM(all modules)

Known Affected Versions:
12.1.0, 12.1.0 HF1, 12.1.0 HF2, 12.1.1, 12.1.1 HF1, 12.1.1 HF2, 12.1.2, 12.1.2 HF1, 12.1.2 HF2, 12.1.3,,,,,,,

Fixed In:
13.0.0, 12.1.4

Opened: Jan 21, 2016
Severity: 3-Major
Related AskF5 Article:


A Set-Cookie command appears for an ASM cookie (TS cookie) where the value has not changed and the set-cookie command is not needed.


The unneeded cookie may disturb caching and cause additional unnecessary bandwidth consumption.


-- The policy building is automatic or manual mode. -- Additional features may also cause TS cookie setting, but usually these will also include cookie changes.


If possible, turn off the policy builder.

Fix Information

Unneeded set cookie for an ASM cookie is not issued.

Behavior Change