Air-ct2500-k9-2-0-0-0-fus.aes Work -

The WLC will be offline for approximately 45 minutes. Expect multiple reboots during the process.

The Field Upgrade Software (FUS) is different from your standard AireOS software updates. While a standard update refreshes the operating system features, the FUS image targets the "low-level" components of the hardware, including: air-ct2500-k9-2-0-0-0-fus.aes

Upgrading the FUS is a high-stakes task because it modifies the bootloader. If the process is interrupted, the controller may require a hardware replacement. The WLC will be offline for approximately 45 minutes

This version (2.0.0.0) is a critical update from the earlier 1.9.0.0 version. Cisco Community Critical Installation Considerations One-Way Upgrade: air-ct2500-k9-2-0-0-0-fus.aes