NVIDIA Networking Server-Side Documentation of Flexboot v3.9.101 & UEFI v14.41.14 (February 2026 GA Release)

Overview

NVIDIA® PreBoot drivers are a multiprotocol remote boot technology that support remote Boot over InfiniBand (BoIB) and over Ethernet.

Using Virtual Protocol Interconnect (VPI) technologies available in NVIDIA® ConnectX® adapters, PreBoot drivers give IT Managers’ the choice to boot from a remote storage target (iSCSI target) or a LAN target (Ethernet Remote Boot Server) using a single ROM image on ConnectX products.

FlexBoot is based on the open source project iPXE available at http://www.ipxe.org.

PreBoot drivers first initialize the adapter device, senses the port protocol – Ethernet or InfiniBand, and brings up the port. Then it connects to a DHCP server to obtain its assigned IP address and network parameters, and also to obtain the source location of the kernel/OS to boot from. The DHCP server instructs the PreBoot drivers to access the kernel/OS through a TFTP server, an iSCSI target, or some other service.

Software Downloads

  • FlexBoot: Please visit FlexBoot page

  • UEFI: Please visit the UEFI webpage

Document Revision History

A list of the changes made to this document are provided in User Manual Revision History.

Release Notes Revision History

Revision

Date

Description

Flexboot 3.9.101

& UEFI 14.41.14

March 01, 2026

Initial release of this Release Notes version.

© Copyright 2026, NVIDIA. Last updated on Mar 1, 2026