Applies To:
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Restore the BIG-IQ and DCD Cluster to Pre-upgrade State
Add the secondary BIG-IQ system to the primary BIG-IQ system
Even though you can log in to the secondary BIG-IQ after the you re-establish the HA configuration, the system continues some database re-indexing processes in the background. For larger configurations, that can take up to an hour. If you perform any searches on objects before it's done re-indexing, BIG-IQ might not return the expected results.
After the HA configuration is re-established, you'll be automatically logged out of the primary BIG-IQ system for a few minutes while the secondary BIG-IQ system restarts.
After the secondary system restarts, you can log back into the primary BIG-IQ system.
Complete post upgrade processing
Upgrade the statistics agent
If you collected statistics in the prior version, then when you finish upgrading the primary BIG-IQ, you need to upgrade the statistics agent on each BIG-IP device that had statistics enabled before the upgrade.