If you move to version 8.5, ensure your older Access Points (like the 1130 or 1240 series) are still supported. They will stop working if the firmware version is too high. 📈 Summary Table: 2504 Firmware Stats Last Stable Train Max AP Support 75 Access Points File Extension Common Protocol TFTP / SFTP

: If using TFTP/SFTP, enter the server IP and file path.

Log into the WLC GUI and navigate to .

: Log in to the Cisco Software Download portal, locate the 2504 model, and download the .aes firmware file to your PC.

: If you do not have a service contract, you may still be eligible for a free upgrade if your current software version has a documented security vulnerability . To request this, email the Cisco Technical Assistance Center (TAC) with your device serial number and the specific security advisory URL.