Last Modified: Oct 06, 2020
See more info
BIG-IP Install/Upgrade, TMOS
Known Affected Versions:
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, 11.5.1 HF6, 11.5.1 HF7, 11.5.1 HF8, 11.5.1 HF9, 11.5.10, 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
12.0.0, 11.6.0 HF6, 11.5.4
Opened: Feb 03, 2015
Related AskF5 Article: K43624250
If the BIG-IP system has a disabled HA Group and is upgraded to 11.5.x or later, the disabled group might be associated with traffic groups on upgrade.
If the BIG-IP system is rebooted after the upgrade, it's possible that the switch will fail over because the HA group score is used even though the HA group is disabled.
Pre-upgrade there is exists a HA Group that is disabled. Upgrade to 11.5.x or later from 10.2.x or 11.x (pre-11.5.0) to a version earlier than 12.0.0, 11.5.4, or 11.6.1.
After the upgrade, check all traffic groups and ensure that none of them are configured to use a disabled HA Group.
Upgrading to 11.5.0 and later no longer associates a disabled HA group to traffic groups. This is correct behavior.