Bug ID 627961: nic_failsafe reboot doesn't trigger if HSB fails to disable interface

Last Modified: Feb 08, 2021

Bug Tracker

Affected Product:  See more info
BIG-IP LTM(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

Fixed In:
12.1.2 HF1

Opened: Nov 10, 2016
Severity: 3-Major
Related AskF5 Article:


The HSB driver attempts a nic_failsafe in the case of failing to disable the interface.


TMM may restart continuously resulting in interfaces bouncing constantly.


The driver disables nic_failsafe prior to triggering the nic_failsafe. This is in hsb_ifdown_go_dead.


Reboot the device.

Fix Information

This release fixes issues where nic_failsafe reboot did not happen on HSB failures.

Behavior Change