eeupdate64eefi /NIC=1 /MAC=001A2B3C4D5E
This writes a new MAC address to the NVM. Note: Changing MACs might violate your local laws or network policies.
Despite its power, eeupdate64eefi can fail. Here’s how to fix common problems.
eeupdate64 typically runs with options to specify the target image, device path, and operation. Example template: eeupdate64eefi work
eeupdate64 -f <firmware_file> -d <device_path> [-s <slot>] [-v]
(Consult your vendor's README for exact flags, as they vary by package.)
Issue: "No Intel adapters found."
Issue: "Write Failed."
eeupdate64eefi is an EFI executable provided by Intel for updating firmware, configuring NVRAM settings, and modifying parameters on Intel network adapters (e.g., PRO/1000, X710, I350, I210, 825xx series). It runs in UEFI shell environments, not in the OS. eeupdate64eefi /NIC=1 /MAC=001A2B3C4D5E
It is part of Intel's BootUtil / EEUpdate package and is essential for low-level adapter management when the OS is not running or when a traditional DOS environment isn't feasible.
The utility communicates directly with the hardware controller of the Network Interface Card (NIC). It accesses the non-volatile memory (EEPROM) where the firmware and configuration settings (such as MAC addresses, PCIe link speeds, and Wake-on-LAN settings) are stored. This writes a new MAC address to the NVM
The Execution Process:
Cause: The PCIe device ID changed, and the UEFI driver no longer recognizes it.
Fix: Load the correct UEFI driver for the new device ID manually before rebooting. Use load -nc drivers/ixgbe.efi.