Last Modified: Apr 28, 2025
Affected Product(s):
BIG-IP TMOS
Known Affected Versions:
11.5.4, 11.5.4 HF1, 11.5.4 HF2, 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, 11.6.1 HF2, 12.0.0, 12.0.0 HF1, 12.0.0 HF2, 12.0.0 HF3, 12.0.0 HF4, 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
Fixed In:
13.0.0, 12.1.2 HF1, 11.6.2, 11.5.4 HF3
Opened: Oct 21, 2016 Severity: 3-Major Related Article:
K51651365
Under certain conditions, load balancing decisions can result in an unequal or unexpected distribution.
The resulting load balancing decisions can lead to an unequal or unexpected distribution of pool selections.
Occurs when topology load balancing is used for a wide IP and more than one pool share the highest assigned score for a particular load balancing decision.
Topology records and pools can be configured to avoid the conditions which cause the condition.
A system DB variable, gtm.wideiptoporandom, has been added. When this system DB variable is assigned the value of "enable" and more than one pool shares the highest assigned score for a given load balancing decision, a random pool is selected.