Bug ID 749402: AFM ACL Rule with Redirect to Virtual action can on rare occasions cause TMM restart

Last Modified: Jun 10, 2021

Bug Tracker

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

Known Affected Versions:
13.0.0, 13.0.0 HF1, 13.0.0 HF2, 13.0.0 HF3, 13.0.1, 13.1.0, 13.1.0.1, 13.1.0.2, 13.1.0.3, 13.1.0.4, 13.1.0.5, 13.1.0.6, 13.1.0.7, 13.1.0.8, 13.1.1, 13.1.1.2, 13.1.1.3, 13.1.1.4, 13.1.1.5, 13.1.3, 13.1.3.1, 13.1.3.2, 13.1.3.3, 13.1.3.4, 13.1.3.5, 13.1.3.6, 13.1.4, 13.1.4.1, 14.0.0, 14.0.0.1, 14.0.0.2, 14.0.0.3, 14.0.0.4, 14.0.0.5, 14.0.1, 14.0.1.1

Opened: Nov 09, 2018
Severity: 2-Critical

Symptoms

TMM restart when Traffic hits AFM Policy Rule having Redirect to Virtual Action, and when the Redirected to Virtual is being modified or when traffic hits the box immediately on TMM service being up. During the time when the TMM has just started, some of the Virtual Server could be in the process of being Ready. When traffic hits the TMM right after TMM startup, and if the Redirect to Virtual is not yet Ready is when this crash is likely. Virtual Server can also be in a not yet Ready state during configuration change of the Virtual Server.

Impact

TMM restart and service disruption. Since the issue can happen when TMM is just up after initialization, when the Virtual Servers are in the process of being initialized one by one, a restart of TMM could cause repeated such TMM crash and restarts.

Conditions

AFM Rule with Redirect to Virtual configured Traffic Matching the Redirect to Virtual rule The Redirect to Virtual Server is not Ready. When a Virtual Server goes through configuration change, or when TMM has just started and not all Virtual Servers are in Ready state yet, this problem can be hit.

Workaround

None

Fix Information

None

Behavior Change