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Zorluk: ZorOS Installation and Upgrade Methods

A network administrator is deploying a standardized Windows 11 Enterprise image across new workstations using Preboot Execution Environment (PXE) through Windows Deployment Services (WDS). During initial testing, UEFI-based workstations successfully obtain an IP address from the DHCP server and locate the WDS server, but fail during the initial boot loader download with an architecture mismatch error. Legacy BIOS-based workstations on the same network subnet complete the PXE boot process without any issues. Which of the following configuration changes on the network deployment services should the administrator make to resolve this boot failure for the UEFI endpoints?

  1. Configure DHCP vendor class identifier options to specify bootmgfw.efi as the Network Boot Program (NBP) for UEFI clients instead of pxeboot.n12Cevap
  2. B
    Perform an in-place architecture upgrade on the WDS server operating system from 32-bit to 64-bit to support 64-bit PXE client requests
  3. C
    Execute sfc /scannow on the WDS server to repair corrupted System State files in the TFTP boot root folder
  4. D
    Grant administrator elevated application execution permissions to the default network installation user account

Cevap

Configure DHCP vendor class identifier options to specify bootmgfw.efi as the Network Boot Program (NBP) for UEFI clients instead of pxeboot.n12.
Preboot Execution Environment (PXE) booting relies on the target machine downloading a Network Boot Program (NBP) via TFTP. Legacy BIOS systems use NBP files designed for x86/x64 legacy boot (such as pxeboot.n12 or wdsnbp.com). Modern UEFI machines require EFI binaries (such as bootmgfw.efi or wdsmgfw.efi). Configuring the network DHCP server or WDS deployment scope with proper vendor class policies ensures UEFI endpoints receive the correct .efi boot loader file.

Adım Adım Çözüm

1
Analyze the boot failure symptom and environment details.
Identified that legacy BIOS machines boot successfully, while UEFI machines fail at the TFTP file download stage due to an architecture mismatch.
Legacy BIOS systems require 16-bit/32-bit real-mode Network Boot Programs such as pxeboot.n12, whereas UEFI firmware requires 64-bit EFI boot loaders like bootmgfw.efi or wdsmgfw.efi.
2
Evaluate PXE boot architecture requirements for DHCP and WDS configuration.
Determined that the DHCP server options (DHCP Option 67) must dynamically assign the correct Network Boot Program based on the client's architecture type identifier (Option 93).
Without vendor class filters or proper WDS boot policy definitions, UEFI devices receive legacy BIOS boot files which fail to execute in UEFI mode.
3
Select the correct administrative remediation step.
Assigning bootmgfw.efi as the NBP file for UEFI architecture clients allows the target systems to load the Windows PE boot environment successfully over PXE.
This directly resolves the architecture mismatch during network OS deployment.

Anahtar Kavram

PXE Deployment and UEFI vs. Legacy BIOS Network Boot Programs
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