NIOS 9.0.2 supports upgrades from the following NIOS releases:

• 9.0.1 and 9.0.0

• 8.6.3 and earlier 8.6.x releases

• 8.5.5 and earlier 8.5.x releases

• 8.4.8 and earlier 8.4.x releases

Even though Infoblox supports the upgrade paths mentioned above, Infoblox has tested and validated only the following upgrade paths for NIOS 9.0.2. Infoblox recommends that you upgrade to NIOS 9.0.2 from these tested and validated releases:

9.0.1, 8.6.3, 8.5.5, and 8.4.8

You cannot upgrade to NIOS 9.0.2 from NIOS 8.3.x and earlier releases.

To ensure that new features and enhancements operate properly and smoothly, Infoblox recommends that you evaluate the capacity on your Grid and review the upgrade guidelines before you upgrade from a previous NIOS release.

If there are pending actions such as a restart or a reboot from past hotfix applications, ensure that these are complete before starting the upgrade process. Failure to do so may cause irreparable harm to your installation. See the “Upgrade Guidelines” section in these Release Notes for information about how to gather pending action data and resolve the actions.

Infoblox recommends that administrators planning to perform an upgrade from a previous release create and archive a backup of the Infoblox appliance configuration and data before upgrading. You can run an upgrade test before performing the actual upgrade. Infoblox recommends that you run the upgrade test, so you can resolve any potential data migration issues before the upgrade.