UUID setting

Name

  uuid

Details

Type	UUID
DHCP option number	97¹⁾
ISC dhcpd syntax	not applicable

Examples

Display the system UUID

  iPXE> show uuid
  smbios/uuid:uuid = 86a9f546-d31b-4ba2-9bbb-303b61bcf8d1

Fetch a boot script based on the system UUID

  iPXE> chain http://boot.ipxe.org/demo/boot.php?uuid=${uuid}

Description

Contains the system UUID, which should be a globally unique and permanent identifier for the system. The system UUID is read from the SMBIOS information.

Notes

iPXE will normally send the system UUID as part of option 97 in all DHCP requests. If you need to prevent this, you can override the system UUID with an invalid value. For example:

  iPXE> set uuid:string INVALID
  iPXE> dhcp                      # Option 97 will not be present in the DHCP request

¹⁾

DHCP option 97 contains a single zero byte followed by the 16-byte system UUID

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