The 2600 series has limited flash (~32MB). The TAR expands to about 25–28MB plus configuration logs. Delete old images manually:
This often happens due to ASCII vs. Binary transfer modes in FTP. Ensure your TFTP client uses binary mode (most do by default). Verify MD5 checksum against Cisco’s published value.
: Indicates the feature set. k9w7 is the Autonomous IOS image, allowing the AP to function as a standalone router/bridge. In contrast, k9w8 is used for Lightweight (WLC-managed) mode. Ap3g2-k9w7-tar.153-3.jf15.tar
Here is everything you need to know about this file and how to use it to liberate your hardware. What is this file? The naming convention of Cisco firmware tells a story:
The most common way to install this firmware is through a TFTP transfer while the device is in recovery mode. Prepare your Environment Download a TFTP server (like ) and place the file in the root directory. The 2600 series has limited flash (~32MB)
rommon 1 > IP_ADDRESS=192.168.1.10 rommon 2 > DEFAULT_GATEWAY=192.168.1.1 rommon 3 > TFTP_SERVER=192.168.1.100 rommon 4 > FILE_NAME=Ap3g2-k9w7-tar.153-3.jf15.tar rommon 5 > tftpdnld
| Attribute | Value | |-----------|-------| | | Ap3g2 (1600/1700/2600/2700/3600/3700) | | Mode | Unified (lightweight + autonomous) | | IOS version | 15.3(3)JF15 | | Security status | Obsolete – multiple known CVEs | | File type | TAR for TFTP/web/controller | | Last supported | 2019 (security advisories), 2020 (full EoL) | Binary transfer modes in FTP
If you found this file in a , it’s a major red flag – those APs are ~7+ years past recommended updates.
: Primary models include the AIR-CAP2602 and AIR-CAP3602 series.