Update... I downloaded the rawhide BOOTAA64.EFI from a different location and am now
getting a different error.
I originally got my boot files out of the the netinst iso from the rawhide download site:
https://dl.fedoraproject.org/pub/fedora/linux/development/rawhide/Server/...
- The BOOTAA64.EFI file from this source gives me the original "PXE-E23" error.
Then, just for fun, I downloaded the BOOTAA64.EFI file directly:
https://dl.fedoraproject.org/pub/fedora/linux/development/rawhide/Server/...
And when I replace the original with this file, I get a different error on the mustang:
..dppath:
path:
Fetching Netboot Image
Unable to fetch TFTP image: TFTP Error
start_image() returned TFTP Error
Again, the logs on my server tell me the mustang is pxe booting and getting an IP address.
And when I tell my dhcp service to serve out the Fedora27 BOOTAA64.EFI file instead,
everything proceeds, and the system boots as expected. So I have to assume at this point
there is a bug - or I am doing something dumb because I need sleep. :-)
Thanks!