(Cisco Controller) > show sysinfo
| Release | Stability | Features | Recommended? | | :--- | :--- | :--- | :--- | | | Very High | Mature, stable, no new features | Yes (Gold Star) | | 8.8.125.x | High | AP lifecycle support | Yes (if you need newer APs) | | 8.10.185.x | Low (for 2504) | High CPU, memory leaks | No (Stick to 8.5 or 8.8) | cisco wlc 2504 firmware download work
If your GUI times out after 90 seconds, the TFTP transfer failed. The 2504 web server is single-threaded; large firmware files require FTP . Switch to FTP if the GUI freezes. (Cisco Controller) > show sysinfo | Release |