According to an Extreme KB ...
In a High Availability pair when upgrading the Extreme Wireless Controller Local AP's will fail over to the backup controller and show as Foreign. In order to upgrade the AP's they must be manually released back to the Primary/Local controller. Check to see AP upgrade behavior settings under the AP menu/ Global Controlled upgrade to manually upgrade AP's Option 2 Always upgrade AP to default image (overrides Controlled Upgrade settings)
Can I do this ??
- Upgrade the secondary controller right now (which presently has zero local AP's, and 100% foreign).
- Download and *schedule* the upgrade for the primary controller at 2:00AM.
- When the AP's try to fly over to the secondary controller, they will be forced into an upgrade.