I saw you enabled VT-D, how about VT-x in BIOS? Another possibility is that your ethernet NIC is not compatible with OVS/DPDK. Please follow these steps, to dig out more info 1. lock your compute-node 2. ssh to your compute-node and check OVS/DPDK status by “sudo ovs-vsctl show” and “python /usr/share/openvswitch/scripts/dpdk-devbind.py --status” From: Himanshu Goyal <himanshugoyal500@gmail.com> Date: Thursday, 24 January 2019 at 4:46 PM To: "Hu, Yong" <yong.hu@intel.com> Cc: "Alonso, Juan Carlos" <juan.carlos.alonso@intel.com>, "starlingx-discuss@lists.starlingx.io" <starlingx-discuss@lists.starlingx.io> Subject: Re: [Starlingx-discuss] Deployment Option (error: compute boot in loop) Hi Yong, I checked server BIOS setting Intel VT-D is enabled in my compute machine compute machine is rebooting only after unlocking, Before reboot it came in unlocked, enabled & online. Please suggest how can i debug this. Many Thanks, Himanshu Goyal On Wed, Jan 23, 2019 at 9:40 PM Hu, Yong <yong.hu@intel.com<mailto:yong.hu@intel.com>> wrote: Intel_iommu=on and immmu are for PCI PT and SR-IOV, as far as I know. There are other 2, like VT-x and VT-d flags, to be enabled. Please have a look in BIOS.