Bug ID 989501: A dataplane_inoperable_t action should be triggered when HSB falls off of PCI bus

Last Modified: Mar 30, 2024

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

Known Affected Versions:
15.1.5,, 15.1.6,, 15.1.7, 15.1.8,,, 15.1.9,, 16.1.2,,, 16.1.3,,,,,

Fixed In:
17.1.1, 16.1.4, 15.1.10

Opened: Feb 01, 2021

Severity: 3-Major


In some rare circumstances, the High-Speed Bridge (HSB) device might fall or drop off of PCI bus, resulting in the BIG-IP system not being able to process traffic. If this happens, a daemon_heartbeat failsafe gets triggered instead of dataplane_inoperable_t action.


The BIG-IP system unable to pass traffic and a failover is triggered.


The conditions that lead to HSB to fall off of PCI bus are unknown at this time.


Reboot the device or the blade to recover from the situation and monitor for re-occurrence. If it happens again, it could indicate potential underlying hardware issue.

Fix Information

The dataplane_inoperable_t High Availability (HA) event should be triggered by overdog process (which monitors high availability (HA) table for failover action types of restart, restart-all, or reboot) and allow for system to be rebooted to recover.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips