iPXE is an enhanced version of the Pre-boot eXecution Environment (PXE), which is an open standard for network booting.
UEFI(Unified Extensible Firmware Interface) and Legacy mode clients fail to boot in iPXE. Even with DHCP forced mode and IP helper configured, clients fail to boot in iPXE.
PXE-E99: Unexpected error(6)
Recreate iPXE package to resolve the issue