I downgraded the WLC4400 software from 4.1.171 to 3.2.215
Maybe my downgrade procedure was not correct.
Now the both the primary and backup image is 188.8.131.52 (as below)
and WLC4400 cannot boot successfully.
(WLC4404 crashed after bootup 2 minutes)
Please choose an option from below:
1. Run primary image (Version 184.108.40.206) (active)
2. Run backup image (Version 220.127.116.11)
3. Manually upgrade primary image
4. Change active boot image
5. Clear Configuration
How can I manually upgrade primary image ?
( above option 3 "Manually upgrade primary image")