Dell Chassis Management Controller Version 1.2 for PowerEdge FX2/FX2s User's Guide

The CMC firmware includes a signature. The CMC firmware performs a signature verification step to ensure the authenticity of the uploaded firmware. The firmware update process is successful only if the firmware image is authenticated by CMC to be a valid image from the service provider and has not been altered. The firmware update process is stopped if CMC cannot verify the signature of the uploaded firmware image. A warning event is then logged and an appropriate error message is displayed.

When you try to upgrade CMC firmware version, CMC Firmware Update Process verifies the firmware image in the selected version for the signature from the service provider. The firmware update is stopped, if the signature is not found or if the verification of the image is not successful. A warning event is logged and an appropriate error message is displayed.

When a firmware downgrade to a earlier version is attempted, CMC Firmware Update Process verifies the firmware image in the earlier versions for the signature from the service provider. The firmware downgrade is stopped, if the computed signature of the earlier version is not recognized by the current CMC firmware. CMC firmware logs a warning event and an appropriate error message is displayed.