Previously, the '--autofree' parameter was included by default in the boot.ipxe template used by Bare Metal Provisioning (Ironic), but the parameter is not supported on older versions of the iPXE ROM (including v1.0.0, which is the stable release and the one that is packaged with Red Hat Enterprise Linux OpenStack Platform). When those older versions were used to boot nodes, the boot failed. Now, the '--autofree' parameter is not included in the iPXE template by default, and older and newer versions of iPXE are supported using the same template. Nodes using older versions can now boot successfully. Users can still add the '--autofree' parameter manually; it is good practice to use the parameter, but it is not mandatory.