If your AP model ends with the letter "I" (e.g., AIR-AP2602I-A-K9), it likely started as lightweight. But the hardware can be converted to autonomous using this image. The risk is that you permanently disable CAPWAP (Control and Provisioning of Wireless Access Points) protocol support unless you flash back.
This specific software version (15.3-3.JF15) is often cited as a critical update for older Aironet hardware to bypass certificate expiration issues. As noted on the Cisco Community , many legacy IOS APs encountered "stuck" downloading states after December 2022 due to expired internal certificates (Field Notice FN72524). Upgrading to a newer autonomous image allows these units to remain functional without a controller. Troubleshooting Tips ap3g1-k9w7-tar.153-3.jf15.tar
For archival, learning, or specialized IoT projects, this file remains a valuable piece of Cisco’s networking history. Treat it with the respect – and caution – it deserves. If your AP model ends with the letter "I" (e
Temporarily disable your PC's firewall if the TFTP transfer fails to start. This specific software version (15
Then set the boot parameter:
: Check for digital signatures or checksums provided by the source. These can be used to verify the integrity and authenticity of the file.
enable archive download-sw /overwrite tftp://<TFTP-SERVER-IP>/ap3g1-k9w7-tar.153-3.jf15.tar