The most secure way to obtain this firmware is through the Cisco Software Download portal.

Guide to Downloading and Installing AP3G2-K9W7-TAR.153-3.JF15.tar (Cisco Autonomous Image)

Plug the power back in while continuing to hold the button for about 20–30 seconds. The AP will look for the and automatically begin the extraction and installation. Verification:

Change your computer's local Ethernet IP address strictly to with a subnet of 255.255.255.0 .

Attempting to flash this image onto unsupported hardware will corrupt the flash storage or cause a boot loop. The ap3g2 image family is explicitly designed for the following Cisco Aironet Access Point series: (e.g., AIR-CAP1602I-x-K9) Cisco Aironet 2600 Series (e.g., AIR-CAP2602E-x-K9) Cisco Aironet 3600 Series (e.g., AIR-CAP3602I-x-K9)

This method uses the archive download-sw command to install the autonomous image. You can use the GUI or CLI; the CLI provides more control. Ensure your TFTP/FTP server is accessible from the AP's IP address, and the .tar file is in the server's root.

: Ensure UDP port 69 is open on your host machine.