Original Publication Date: 08/08/2013
Updated Date: 03/10/2016
The high availability (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 while the HA group feature is enabled. 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 before forcing the active system to standby. Alternatively, you can take the active system offline temporarily. To do so, perform one of the following procedures.
Disabling the HA group feature before forcing the active system to standby
Impact of procedure: This will cause a failover event and the active device to become standby, no longer passing traffic.
Using the Configuration utility to disable the HA group feature and force the system to standby
traffic-group-1 is the default traffic group.
Using the tmsh utility to disable the HA group and force the system to standby
modify /sys ha-group [name] disabled
For example, to disable an HA group name ha_failover_example, type the following command:
modify /sys ha-group ha_failover_example disabled
run /sys failover standby
Taking a system offline
Impact of procedure: When the BIG-IP system is in the offline state, the TMM interfaces no longer send and receive traffic. This can impact HA features such as connection mirroring.
Using the Configuration utility to take a system offline
Using the tmsh utility to take a system offline
run /sys failover offline
run /sys failover online