Bug ID 468517: Multi-blade systems can experience active/standby flapping after both units rebooted

Last Modified: Apr 10, 2019

Bug Tracker

Affected Product:  See more info
BIG-IP LTM(all modules)

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, 11.6.0, 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, 11.5.2

Opened: Jun 23, 2014
Severity: 3-Major
Related AskF5 Article:


After rebooting multi-bladed BIG-IP systems configured for failover, one or more of the systems has some of its blades flap from active to standby.


Invalid redundant status.


Rebooting systems fairly close in time from one another (about a minute apart). Traffic group must reference an HA group.


Modify the traffic group to no longer reference an HA group: tmsh modify cm traffic-group traffic-group-1 ha-group none.

Fix Information

Multi-blade systems no longer experience active/standby flapping after both units are rebooted, so the following MCPD error message no longer occur at the secondary blades: err mcpd[6528]: 010717b5:3: HA group (HA) cannot be removed. It is used by traffic group (/Common/traffic-group-1 ).

Behavior Change