Bug ID 511187: The BIG-IP ASM bd process may produce a core file when a large BIG-IP ASM configuration is modified on a loaded system

Last Modified: Oct 06, 2020

Bug Tracker

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

Known Affected Versions:
11.6.0, 11.6.0 HF1, 11.6.0 HF2, 11.6.0 HF3, 11.6.0 HF4, 11.6.0 HF5, 11.6.0 HF6, 11.6.0 HF7, 11.6.0 HF8, 11.6.1, 11.6.1 HF1

Fixed In:
12.0.0, 11.6.1 HF2

Opened: Mar 08, 2015
Severity: 2-Critical
Related AskF5 Article:


Under rare circumstances, the BIG-IP ASM bd process may produce a core file. As a result of this issue, you may encounter one or more of the following symptoms: Your BIG-IP ASM system temporarily fails to pass traffic. Your BIG-IP ASM bd process restarts and creates a core file in the /var/core/ directory.


Traffic processing is interrupted while the bd process restarts.


This issue occurs when the following condition is met: You perform an extensive reconfiguration to many BIG-IP ASM policies while your BIG-IP ASM system is under heavy load. Impact



Fix Information

Fixed a bd crash that happens upon configuration change with very large deployments.

Behavior Change