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Manual Chapter: BIG-IQ High Availability
Manual Chapter
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How do I manage BIG-IQ systems in a high availability configuration?

Setting up BIG-IQ®in a high availability configuration ensures that you always have access to the BIG-IP® devices you are managing. In a BIG-IQ high availability configuration, the BIG-IQ system replicates configuration changes since the last synchronization from the primary device to the secondary device every 30 seconds. If it ever becomes necessary, you can have the secondary peer take over management of the BIG-IP devices.

Add a peer BIG-IQ system for a high availability configuration

Before you can set up F5® BIG-IQ® Centralized Management in a high availability (HA) pair, you must have two licensed BIG-IQ systems.

For the high-availability pair to synchronize properly, each system must be running the same BIG-IQ version, and the clocks on each system must be synchronized to within 60 seconds. To make sure the clocks are in sync, take a look at the NTP settings on each system before you add a peer.

Configuring BIG-IQ in a high availability (HA) pair means that you can still manage your BIG-IP® devices even if one BIG-IQ systems fails.
  1. At the top of the screen, click System.
  2. On the left, click BIG-IQ HA.
  3. Click the Add Secondary button.
  4. Type the properties for the BIG-IQ system that you are adding.
    The IP address you use for device discovery must be the same on both peers in a high availability configuration.
  5. Click the Add button at the bottom of the screen.
The BIG-IQ system synchronize. Once they are finished, both appear as ready (green).

Promote the secondary BIG-IQ system to primary for an HA pair

If the primary BIG-IQ® in an HA pair is having any type of system issue, you might want to make the secondary BIG-IQ the primary system until you can fix the problem.

You can promote the secondary system to primary when you are logged in to either BIG-IQ system in the pair.

This task describes how to promote the secondary BIG-IQ system while logged in to the primary BIG-IQ system.

  1. At the top of the screen, click System.
  2. On the left, click BIG-IQ HA.
  3. Click the BIG-IQ HA Settings button and then click the Promote button.
The secondary BIG-IQ system synchronizes with the primary BIG-IQ system, and promotes to being the primary BIG-IQ system.

Remove the secondary BIG-IQ system from a high availability pair

To change or reconfigure (including upgrading) a BIG-IQ® Centralized Management system in a high availability (HA) pair, you must first split the HA relationship by removing the secondary system.
  1. At the top of the screen, click System.
  2. On the left, click BIG-IQ HA.
  3. Select the check box next to the secondary BIG-IQ system, and click the Remove Secondary button.
  4. Click the Remove button.
The BIG-IQ systems are now standalone.
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