Last Modified: Apr 28, 2025
Affected Product(s):
BIG-IP Install/Upgrade
Known Affected Versions:
11.4.1, 11.5.0, 11.5.1, 11.5.1 HF1, 11.5.1 HF2, 11.5.1 HF3, 11.5.1 HF4, 11.5.1 HF5, 11.5.1 HF6, 11.5.1 HF7, 11.5.1 HF8, 11.5.1 HF9, 11.5.1 HF10, 11.5.1 HF11, 11.5.2, 11.5.2 HF1, 11.5.3, 11.5.3 HF1, 11.5.3 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
Fixed In:
12.0.0, 11.6.1 HF1, 11.5.4
Opened: Jul 01, 2015 Severity: 2-Critical Related Article:
K17342
HA pair should remain in active/standby state after the software upgrade but instead goes into an active/active state.
Active/Standby configuration is lost.
Occurs in an active/standby HA pair which has a medium size configuration of pools and virtual servers (at least 30 objects total). The standby device is upgraded first and then it is rebooted. After reboot, the HA pair goes into an Active/Active state. Upgrades to 11.5.0 through 11.5.3 as well as to 11.6.0 are impacted.
Reconfigure the HA pair back to active/standby.
HA pair in a typical Active/Standby configuration now remain Active/Standby after a software upgrade.