Some APS stuck in the IL stage when they go online

Wireless environment.

When AC upgrades the version, one AP is stuck in the IL phase and cannot be upgraded successfully.

From the AC diagnosis, the AP prompts that the download has been repeated after the download:

Line 10301: %Mar 22 10:07:49:890 2022 WX3540H CWS/6/CWS_IMG_DOWNLOAD_COMPLETE: Downloading the image file wa5300.ipe for AP AP-2 through the CAPWAP tunnel is complete.

Line 10306: %Mar 22 10:07:56:104 2022 WX3540H CWS/6/CWS_IMG_DOWNLOAD_START: AP AP-2 started to download the image file wa5300.ipe.

Line 10462: %Mar 22 10:08:45:942 2022 WX3540H CWS/6/CWS_IMG_DOWNLOAD_COMPLETE: Downloading the image file wa5300.ipe for AP AP-2 through the CAPWAP tunnel is complete.

Line 10476: %Mar 22 10:08:54:936 2022 WX3540H CWS/6/CWS_IMG_DOWNLOAD_START: AP AP-2 started to download the image file wa5300.ipe.

Log in to the AP to view the log. The AP has been trying to download the version.

===============display logbuffer===============  

Log buffer: Enabled

Max buffer size: 1024

Actual buffer size: 512

Dropped messages: 0

Overwritten messages: 2153

Current messages: 512

%Mar 19 15:35:17:926 2022 H3C CWC/6/CWC_IMG_DOWNLOAD_START: Started to download the image file wa5300.ipe through the CAPWAP tunnel to AC 172.18.1.2.

%Mar 19 15:36:08:556 2022 H3C CWC/6/CWC_IMG_DOWNLOAD_START: Started to download the image file wa5300.ipe through the CAPWAP tunnel to AC 172.18.1.2.

View AP memory:

   ===============dir /all /all-filesystems=============== 

Directory of flash:

   0 drw-           - Mar 18 2022 22:56:16   core

   1 -rw-     5008384 Jan 01 2016 00:00:00   wa5300-boot.bin

   2 -rw-    16177152 Jan 01 2016 00:00:00   wa5300-system.bin

30720 KB total (912 KB free)

In the old version, the two bins add up to: 21185536 byte

The remaining space on the AP: 912 KB free

And the two bin of the new version add up to 23636992 bytes

It is concluded that there is a core file on this AP, resulting in insufficient flash space on the AP, and the download of the AP version is unsuccessful.

When AP is in the upper and lower AC versions, we require that the new version size < = the old version + the remaining space

After formatting, the AP goes online again successfully