Bug ID 544979: Changing the LSN pool to an unsupported mode may result in a TMM crash

Last Modified: Apr 28, 2025

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

Known Affected Versions:
12.0.0

Fixed In:
12.0.0 HF3

Opened: Sep 09, 2015

Severity: 3-Major

Symptoms

Changing the LSN pool mode may result in a TMM core if the BIG-IP is processing translations and the resulting config is not supported. When the pool mode changes while a translation is in progress validation checks may be skipped. This can cause a NULL pointer exception.

Impact

Traffic disrupted while tmm restarts.

Conditions

Vlans configured with default DAG. A small LSN pool configured with NAPT mode. Changing the pool mode to PBA while translations are in progress. PBA is not supported with default DAG.

Workaround

None

Fix Information

With this fix, tmm no longer crashes when changing the LSN pool to an unsupported mode.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips