You can ensure that you always have access to managed BIG-IP devices by installing two or more BIG-IQ systems in an active-active, high availability (HA) configuration. Any configuration change that occurs on one BIG-IQ system is immediately synchronized with its peer devices. If a BIG-IQ system in an active-active HA configuration fails, a peer BIG-IQ system takes over the device management.

1. Log in to BIG-IQ System with your administrator user name and password.
2. At the top of the screen, click Configuration.
3. Hover over the BIG-IQ Systems header, click the + icon when it appears, and then click Add Device. The Add Device screen opens.
4. In the Peer IP Address field, type the self IP address (on the internal VLAN) of the peer system. Do not use the management IP address of the peer system.
5. In the User name and Password fields, type the administrative user name and password for the system.
6. From the Group list, select Management Group.
7. Click the Save button.