| Symptom | Likely Cause | Solution | | :--- | :--- | :--- | | AP reboots, loads old image | CAPWAP image priority set to "Mirror" | Use debug capwap ap image ; set config ap image predownload | | "Tar file extraction failed" | Corrupt download or low flash memory | Wipe AP flash: ap-type flash-clean before retry | | "Invalid image type" | AP hardware mismatch (e.g., 1700 series) | This file is for AP3g2 (2600/3600/3700) | | AP stuck in Discovery phase | Image and WLC version mismatch | Check debug capwap events ; upgrade WLC first |