PXE-T05 ' unknown transfer ID ' PXE-E36 ' error received from the TFTP server '
Cause
Misconfigured DHCP options.
Unsupported block size. What network device that may cause this is uncertain.
Resolution
Add Option 60 to DHCP. Check the document: 179449 Delete existing options 66 and 67 on DHCP.
Change Block Size
Launch Deployment Console
Click Tools > PXE Configuration
Click the Multicast tab
Change Packet Size to 768
If this resolves the issue, increasing the packet size may improve performance. Increase a little at a time until the highest consistently working number is found.