The Netyeti's Journal

PXE Boot

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PXE Boot: The Network Powerhouse

Preboot Execution Environment (PXE) allows a computer to boot from the network before its local OS loads.

Why PXE?

  • Automation: Install OSs on multiple machines without touching a USB drive.
  • Diskless Nodes: Boot machines (like a Raspberry Pi cluster) without local storage.
  • Diagnostics: Boot into a live environment like Memtest86 or Clonezilla for maintenance.

NetYeti’s Implementation Stack

  • DHCP: Tells the machine where the PXE server is (using Options 66 and 67).
  • TFTP: Serves the initial bootloader (like ipxe.efi).
  • HTTP: Serves the larger OS images (much faster than TFTP).
  • Tools:
    • Netboot.xyz: The “Swiss Army Knife” of network booting.
    • Fog Project: For full-blown image management.

Integration Tip

  • Use dnsmasq for a lightweight PXE/DHCP/DNS all-in-one.
  • If using Proxmox, enable PXE on new LXCs/VMs for rapid provisioning.

Knowledge Check:

  • Is your DHCP server correctly identifying the client architecture (BIOS vs UEFI)?
  • Are your network switches configured for “PortFast” to avoid boot timeouts?

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