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Product Manuals and Release notes
You can ensure that you always have access to managed BIG-IP devices by installing two BIG-IQ systems with an active-active, high availability (HA) configuration. Any configuration change that occurs on one BIG-IQ system is immediately synchronized with its peer device. If a BIG-IQ system in an active-active HA configuration fails, the peer BIG-IQ system takes over the BIG-IQ device management that was previously done by the original device.
Configuring BIG-IQ Cloud in a high availability pair means you always have access to all of the BIG-IP devices in your network. (Configuring a high availability pair is optional.)
If discovery fails, a Delete button displays. Verify the correct self IP address and credentials. Then click the Delete button to remove the incorrect information, and re-type the self IP address, user name, and password.