Select from the available software types. Locate release 15.3.3-JF15 and click download.

+-------------------------------------------------------------------+ | 1. Rename firmware file on TFTP server to: | | "ap3g1-k9w7-tar.default" | +-------------------------------------------------------------------+ | v +-------------------------------------------------------------------+ | 2. Configure TFTP server computer with static IP: | | 10.0.0.2 /255.0.0.0 | +-------------------------------------------------------------------+ | v +-------------------------------------------------------------------+ | 3. Unplug AP power source. Press and hold physical MODE button. | +-------------------------------------------------------------------+ | v +-------------------------------------------------------------------+ | 4. Plug power back in. Keep holding MODE button until LEDs | | turn solid red/amber (approx. 10–15 seconds). Release button. | +-------------------------------------------------------------------+ | v +-------------------------------------------------------------------+ | 5. AP broadcasts to 10.0.0.1, fetches "ap3g1-k9w7-tar.default", | | re-formats flash, installs firmware, and reboots. | +-------------------------------------------------------------------+ How to Safely Download the Image

If an Aironet 3500 experiences a flash file system corruption, failed upgrade loop, or forgotten administrative credentials, this .tar bundle acts as the primary bare-metal baseline restore image. Technical Guide: Installing ap3g1-k9w7-tar.153-3.jf15.tar

Cisco IOS image names for Aironet hardware use a precise naming convention. Breaking down the string ap3g1-k9w7-tar.153-3.jf15.tar helps reveal exactly what this software contains:

While the TFTP recovery method is the most standard, there are a few other paths you might consider:

Navigate to the Cisco Software Download portal. Log in using your Cisco Connection Online (CCO) account.

A: Yes, the ap3g1-k9w7-tar.153-3.jf15.tar image is an autonomous-mode firmware. You can use it to convert a lightweight 1530 series AP into an autonomous one by following the steps outlined in the article.

Locate the official or SHA-512 checksum listed on Cisco's site for the 153-3.JF15 release.

: Connects the management computer, the TFTP server, and the access point to the same local area network. 3. How to Securely Download the Image