- WLC doesn’t allow upload or download from a wireless TFTP/FTP computer that is associated to an access point. This has always been by Cisco WLC design. You need such TFTP or FTP to be wired to network and reachable to WLC. However, you can TFTP/FTP from a wireless client to upload or download from the WLC if you are associated to a different WLC access point.
Cisco Wireless LAN Controller – Things to know