Bug ID 430354: System erases alarm lights once the USB LCD dongle is attached.

Last Modified: Oct 17, 2023

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

Known Affected Versions:
11.4.1, 11.5.0, 11.5.1, 11.5.2, 11.5.3, 11.5.4, 11.5.5, 11.5.6, 11.5.7, 11.5.8, 11.5.9, 11.5.10, 11.6.0, 11.6.1, 11.6.2, 11.6.3,,,,, 11.6.4, 11.6.5,,,, 12.0.0, 12.0.0 HF1, 12.1.0 HF1, 12.0.0 HF2, 12.1.0 HF2, 12.0.0 HF3, 12.0.0 HF4, 12.1.1 HF1, 12.1.1 HF2, 12.1.2 HF1, 12.1.2 HF2, 12.1.0, 12.1.1, 12.1.2, 12.1.3,,,,,,,, 12.1.4,, 12.1.5,,,, 12.1.6

Opened: Sep 11, 2013

Severity: 3-Major


When an alarm light is present on the primary blade and the USB LCD dongle is then attached, all of the blades go from green/pri or green/sec to amber status, and the alarm light is erased. A few moments later once the LCD screen is up, the blades go back to their original green pri/sec assignment but the alarm light never returns. Although the alarm message is present on the LCD after it comes up, the alarm light should stay on until the alarm has been cleared.


The alarm message is present on the LCD after it comes up. This is a cosmetic issue, and does not indicate a system issue.


Inserting or removing USB LCD module.


Run system_check manually.

Fix Information


Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips