Ap3g2-k9w7-tar.153-3.jd.tar- Download Instant

Here's a bonus feature to automatically serve the downloaded file via TFTP:

# tftp_server.py - Optional TFTP server for easy deployment
from py3tftp import TFTP
def start_tftp_server(directory: str = "./downloads", port: int = 69):
"""Start a simple TFTP server to serve firmware"""
tftp = TFTP(directory)
print(f"Serving directory via TFTP on port port")
tftp.run(port)

This firmware is specifically compiled for the AP3G2 bootloader architecture. It works on the following Cisco Aironet models:

Do not attempt to flash this on older APs (like 1240, 1250, 1260) or newer ones (1800, 2800, 3800). Doing so will brick the device. Ap3g2-k9w7-tar.153-3.jd.tar- Download

If you no longer have a Cisco contract, check:

⚠️ Warning: Only use official Cisco software on production networks. Unofficial downloads may have tampered images.

Q: Can I use this file on an Aironet 1830 or 1540 series?
No. Those models use a different bootloader and require ap1g4 or ap1g5 images.

Q: What is the difference between ap3g2-k9w7-tar.153-3.jd.tar and ap3g2-k9w7-mx.153-3.jd.tar?
The “mx” variant includes Cisco Mobility Express (virtual controller) features. The standard “tar” version without “mx” is for traditional WLC deployments. Both are included in the same downloadable bundle. Here's a bonus feature to automatically serve the

Q: How big is the file?
Approximately 28–32 MB. The .tar expands to about 70 MB on the AP’s flash.

Q: Can I downgrade from 15.3(3)JD to an older version?
Yes, but you must use the recovery TFTP procedure. Simple web UI downgrades often fail due to partition size changes.

tar: This is a compressed archive file (Tape Archive). It contains the IOS .bin file and other system files required for the web interface.

Before you download, gather the following:

Note the file size: Approximately 25–30 MB. Ensure your TFTP server is configured to handle files larger than 32 MB if needed (some have limits). This firmware is specifically compiled for the AP3G2

The 15.3(3)JD release is a mature, stable train for the AP3G2 platform. Compared to newer or older releases:

Network administrators seeking a balance between security updates and stability often settle on this exact version.

Once you have successfully downloaded and verified the .tar file, you need to upload it to the AP. There are three methods.

# tftp_server.py - Optional TFTP server for easy deployment from py3tftp import TFTP

def start_tftp_server(directory: str = "./downloads", port: int = 69): """Start a simple TFTP server to serve firmware""" tftp = TFTP(directory) print(f"Serving directory via TFTP on port port") tftp.run(port)