Do not extract the .tar file. Install it directly:
ap-type mobility-express tftp://<tftp-server-ip>/AIR-AP2800-K9-ME-8-3-133-0.tar
After deploying air-ap2800-k9-me-8-3-133-0.tar, confirm success:
If you have a Cisco 2800 Series AP, you should be running a much newer version of code. The "Gold Standard" for the 2800 series is generally considered to be 8.5.161.0 or the newer 8.10.185.0 (depending on your specific client needs). Air-ap2800-k9-me-8-3-133-0.tar Download
Why upgrade?
If you are flashing the AP via TFTP because it is stuck in a boot loop or has no configuration: Do not extract the
Critical Warning: Never download Cisco firmware from third-party file hosting sites, torrents, or unverified blogs. These files can contain malware, backdoors, or corrupted images that can brick your AP. Cisco requires a valid service contract or support account.
Air-ap2800-k9-me-8-3-133-0.tar likely refers to a software image package for Cisco wireless controller/platforms (Air or AP controllers) with a filename indicating platform (AP2800), feature/license (k9), and IOS-XE/ME train version (8.3.133.0). A wide-ranging write-up covers probable contents, purpose, installation considerations, upgrade procedure, compatibility, backup and rollback, troubleshooting, security and licensing, and best practices. Via Console (if currently a lightweight AP):
For newer features or bug fixes, consider a later 8.5 or 8.10 release, as 8.3 is considered a mature but aging train. Always test in a non-production environment first.
Need help? Visit the Cisco Community Wireless Forum for troubleshooting.