Hi,<br />I want to exclusively use PXE/IPv6 when deploying a set of physical machines with some QEMU/KVM virtual machines on top.<br /><br />So far, the only [hacky] way I have managed to do this is to:<br />1) Bring up a VM with OVMF<br />2) Set the wanted boot-order with PXE over IPv6 at the top<br />3) Save this to the NVRAM<br />4) Repete the above for a set of VMs with different MAC addresse<br />5) Keep these NVRAMs as "canned" templates (with associated fixed MACs)<br />4) Later use one of these NVRAM as a template for VMs with the associated MAC&nbsp;<br /><br />Obviously this does not scale to hundreds of VMs<br /><br />Reading through the code is seems that it might be possible to disable PXE over IPv4 with<br />the PCD variable "IPv4PXESupport" = &lt;one byte binary zero&gt;.<br /><br />I have tried with<br />&nbsp;&nbsp;&nbsp; &lt;qemu:arg value='-fw_cfg'/&gt;<br />&nbsp;&nbsp;&nbsp; &lt;qemu:arg value='opt/ovmf/X-PcdIPv4PXESupport,file=/var/lib/libvirt/qemu/nvram/zero'/&gt;<br /><br />where the file is a one byte binary zero and I have verified that it shows up in /sys/firmware/qemu_fw_cfg.<br /><hr /><span style="font-size: 8pt;">linux-u7u9:/sys/firmware/qemu_fw_cfg/by_name # ls opt/ovmf/X-PcdIPv4PXESupport/</span><br /><span style="font-size: 8pt;">key&nbsp; name&nbsp; raw&nbsp;size</span><br /><span style="font-size: 8pt;">linux-u7u9:/sys/firmware/qemu_fw_cfg/by_name # cat opt/ovmf/X-PcdIPv4PXESupport/size <br /></span><span style="font-size: 8pt;">1</span><br /><span style="font-size: 8pt;">linux-u7u9:/sys/firmware/qemu_fw_cfg/by_name # od -b opt/ovmf/X-PcdIPv4PXESupport/raw </span><br /><span style="font-size: 8pt;">0000000 000</span><br /><hr />Is this something that should work, or is this variable compiled in ?<br />Are there other ways of acomplishing what I try to do ?<br /><br />Thanks,<br /><br />&nbsp;&nbsp; /Per