Hi Matt, I find another way to pass through SR-IOV capable physical NIC to VM. This new way doesn't require to configure "PCI alias". The key point is to create a port whose vnic_type is direct-physical. The following link can be referenced: https://access.redhat.com/documentation/en-us/red_hat_openstack_platform/10/... However if we try to pass through a physical NIC which doesn't support SR-IOV, we may still need to configure "PCI alias". Because I don't have a physical NIC which doesn't support SR-IOV on my server, I can't test passing such NIC to VM by creating port whose vnic_type is direct-physical. Do you think StarlingX needs to configure “PCI alias” automatically for physical NIC which doesn’t support SR-IOV or not? Best Regards, Xu, Chenjie From: Peters, Matt [mailto:Matt.Peters@windriver.com] Sent: Thursday, August 1, 2019 6:34 PM To: Xu, Chenjie <chenjie.xu@intel.com>; Webster, Steven <Steven.Webster@windriver.com>; Kopec, Gerald (Gerry) <Gerry.Kopec@windriver.com> Cc: Khalil, Ghada <Ghada.Khalil@windriver.com>; Zhao, Forrest <forrest.zhao@intel.com>; starlingx-discuss@lists.starlingx.io Subject: Re: [Starlingx-discuss] [Bug] flavor "pci_passthrough:alias" should be required to passthrough physical NICs +Steve +Gerry Do you have any additional information to add here? I don’t believe we had to setup an alias in the past to do PCI-PT, so is this something that is new to the latest OpenStack nova release? Did we drop some functionality to align with upstream nova (that use to be in starlingx-staging)? -Matt From: "Xu, Chenjie" <chenjie.xu@intel.com<mailto:chenjie.xu@intel.com>> Date: Thursday, August 1, 2019 at 3:36 AM To: "Peters, Matt" <Matt.Peters@windriver.com<mailto:Matt.Peters@windriver.com>> Cc: Ghada Khalil <Ghada.Khalil@windriver.com<mailto:Ghada.Khalil@windriver.com>>, "Zhao, Forrest" <forrest.zhao@intel.com<mailto:forrest.zhao@intel.com>>, "starlingx-discuss@lists.starlingx.io<mailto:starlingx-discuss@lists.starlingx.io>" <starlingx-discuss@lists.starlingx.io<mailto:starlingx-discuss@lists.starlingx.io>> Subject: [Starlingx-discuss] [Bug] flavor "pci_passthrough:alias" should be required to passthrough physical NICs Hi Matt, Based on my testing, the flavor with property “pci_passthrough:alias” should be required for passing a physical NIC to the VM. But it should not be required for passing a VF to the VM. So I think the alias information should contain physical NICs which are configured with “pci-passthrough” by following command: system host-if-modify -m 1500 -n pcipass -c pci-passthrough ${COMPUTE} ${IFUUID} system interface-datanetwork-assign ${COMPUTE} pcipass ${PHYSNET2} Could you please let me know your opinions and leave a comment in the below bug: https://bugs.launchpad.net/starlingx/+bug/1836682 Best Regards, Xu, Chenjie