Original Publication Date: 08/08/2013
Updated Date: 03/28/2014
The HA groups feature is designed to assign the active system without user intervention. Therefore, the operator of a BIG-IP system should not attempt to manually control HA operation by using the Force to Standby feature. As a result, the HA group feature may override the active/standby state and may reassign the active system automatically.
If a manual change of the active state is required, F5 recommends that you disable the HA group feature, or that you take the active system offline temporarily.
To take a system offline, perform one of the following procedures:
Taking a system offline using the BIG-IP Configuration utility
Taking a system offline using the Traffic Management Shell (tmsh) utility
run sys failover offline
run sys failover online