UEFI PXE Boot on NUC8i5BEH not working; Legacy PXE Boot works immediately

[jhamann]

Hello,

I am trying to boot 17 NUC8i5BEH from PXE using the UEFI Network boot. I am using wireshark on the tftp server to see what is going on when the NUC starts up and I can see that it connects to the server and requests the correct file. Then the server responds with the first package in the download and immediately after there is an error:

126978 57.620110256 10.42.0.173 10.42.0.2 TFTP 68 Error Code, Code: Illegal TFTP Operation, Message: User aborted download

Then it looks like the PXE boot aborts and it continues with the next boot option. If I enable endless retries it will keep hitting the tftp server about every 5 seconds and repeat the same situation.

However when I disable UEFI Network Boot and instead use legacy BIOS boot, then it works immediately. I do not understand why that would be the case. Is there some configuration that I am setting wrong? I have investigated the related forum posts and there seem to be some issues with UEFI PXE Boot in contrast to Legacy PXE boot, but none of the answers were working for my situation.

Thank you for your help.

[Esteban_D_Intel]

Hello jhamann,

Thank you for posting on the Intel® communities.  

We understand that you are experiencing an odd behavior while using PXE boot on UEFI mode.

To better assist you, please provide the following information:

• Please provide the BIOS version of the device.
• Are all the units experiencing this behavior?
• Was it working fine at a certain point?
• Were any changes made in BIOS?
• What OS is installed?

Esteban D.

Intel Technical Support Technician

[jhamann · Accepted solution]

Hello Esteban,

thank you for your quick reply.

After some troubleshooting I have been able to figure out my problem: I forgot to set DHCP Option 13 (the size of the bootfile). This is why it requested a file of size zero and aborted the download immediately. After setting option 13 to (FILESIZE in Bytes) / 512 it worked like a charm. (cf. https://unix.stackexchange.com/questions/494699/tftp-timeout-problem-during-pxe-boot )

Sorry for blaming you guys. Have a nice day.

[Esteban_D_Intel]

Hello jhamann, 

It's nice to know that you were able to resolve this matter on your side.

If you need any additional information, please submit a new question as this thread will no longer being monitored  

 Esteban D.  

 Intel Technical Support Technician