Preparing for the upgrade of firmware for the Cisco UCS, you must first &quot;download&quot; the necessary firmware image or, in my case, the firmware bundle (which includes the firmware for all of the UCS components).

While trying to download the image, the status continually showed &quot;downloading&quot;, but never incremented past 2%. After letting it fail and then trying it one more time, I realized what was wrong: I was using TFTP.

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TFTP has a 32MB limit (traditionally)-- and this limit IS applied when using the TFTP option on the UCS. So I fired up an FTP server software on my machine, reconfigured the UCS to use FTP, and viola! The image downloaded with no issues, and I was able to continue with the upgrade.