Last Modified: Feb 13, 2019
Affected Product:
See more info
BIG-IP LTM
Known Affected Versions:
11.4.0, 11.5.0, 11.5.1, 11.5.1 HF1, 11.5.1 HF10, 11.5.1 HF11, 11.5.1 HF2, 11.5.1 HF3, 11.5.1 HF4, 11.5.1 HF5, 11.6.0, 11.6.0 HF1, 11.6.0 HF2, 11.6.0 HF3, 11.6.0 HF4
Fixed In:
12.0.0, 11.6.0 HF5, 11.5.1 HF6
Opened: Jul 04, 2014
Severity: 3-Major
Related AskF5 Article:
K16242
Priority groups may result in traffic being load balanced to a single pool member.
Traffic is improperly load balanced.
This occurs when the following conditions are met: -- Multiple priority groups. -- Slow ramp feature enabled (TCP profile). -- Active priority group goes offline. -- Member in the newly active group goes offline then online (triggering slow ramp feature).
Disable slow ramp feature in the TCP profile.
The BIG-IP system calculates the correct number of members in the active priority group when the slow ramp feature is triggered.