Bug ID 647988: HSL Balanced distribution to Two-member pool may not be balanced correctly.

Last Modified: Nov 07, 2022

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, 12.1.2 HF1, 12.1.2 HF2, 13.0.0, 13.0.0 HF1, 13.0.0 HF2, 13.0.0 HF3

Fixed In:
13.1.0, 13.0.1, 12.1.3

Opened: Feb 28, 2017
Severity: 3-Major
Related Article:


When configuring a two-member pool as HSL destination and using "balanced" distribution, logs from iRule HSL::send may end up balanced to a single pool member.


Log message may not be distributed correctly resulting in more load on a single pool member.


- Two-member pool configured as remote-high-speed-log destination. - The remote-high-speed-log distribution is set to "balanced" - Data-Plane logging using for example but not limited to: iRule HSL::send.



Fix Information

Logs are distributed more equally on pool members in "balanced" distribution HSL.

Behavior Change