Hi, Due to the depreciation of ovn/vif_type config, I'm still confused about how to implement OVN with DPDK in the proper way. In my experience, br-int datapath_type always returns to the "system" form "netdev" everytime VIF is plugged, even if it is from the first VM created on an empty compute node. My suspicion is related to the following debug log of nova-computer. 2023-02-09 04:34:42.395 1192435 DEBUG ovsdbapp.backend.ovs_idl.transaction [-] Running txn n=1 command(idx=0): AddBridgeCommand(name=br-int, may_exist=True, datapath_type=system) do_commit /usr/lib/python3/dist-packages/ovsdbapp/backend/ovs_idl/transaction.py:90 For information, following is the compute node OVS and Chassis configuration before any VIF is plugged. root@compute01:~# ovs-vsctl list Open_vSwitch _uuid : 799b3140-fe2e-48c6-9779-679152f2eb32 bridges : [6a3b363d-99c7-47b6-9c30-167fbf18cbd8, d2d5b32e-4089-493b-870a-aa056e311b92, ea68d505-bb91-4b15-a532-b942ea9c4e9f] cur_cfg : 440 datapath_types : [netdev, system] datapaths : {netdev=90cd281a-5890-4202-b7b2-ce2fe0bc538f, system=fa3dc7b5-929f-4cad-bdf0-36dbf9ddf78e} db_version : "8.3.0" dpdk_initialized : true dpdk_version : "DPDK 21.11.2" external_ids : {hostname=compute01, ovn-bridge-datapath-type=netdev, ovn-bridge-mappings="provider:br-provider", ovn-encap-ip="10.10.203.14", ovn-encap-type=geneve, ovn-nb="tcp:haproxy.internal:6641", ovn-openflow-probe-interval="60", ovn-remote="tcp:haproxy.internal:6642", ovn-remote-probe-interval="60000", rundir="/var/run/openvswitch", system-id="673c46a0-d9a1-40f8-a164-537693fabf95"} iface_types : [bareudp, dpdk, dpdkvhostuser, dpdkvhostuserclient, erspan, geneve, gre, gtpu, internal, ip6erspan, ip6gre, lisp, patch, stt, system, tap, vxlan] manager_options : [] next_cfg : 440 other_config : {dpdk-init="true", dpdk-socket-mem="1024,1024", pmd-cpu-mask="0x000200000002000200000002", vlan-limit="0"} ovs_version : "3.0.1" ssl : [] statistics : {} system_type : ubuntu system_version : "22.04" root@compute01:~# ovs-vsctl list Bridge _uuid : ea68d505-bb91-4b15-a532-b942ea9c4e9f auto_attach : [] controller : [] datapath_id : "000006d568ea154b" datapath_type : netdev datapath_version : "<built-in>" external_ids : {netplan="true", "netplan/global/set-fail-mode"=standalone, "netplan/mcast_snooping_enable"="false", "netplan/rstp_enable"="false"} fail_mode : standalone flood_vlans : [] flow_tables : {} ipfix : [] mcast_snooping_enable: false mirrors : [] name : br-tun netflow : [] other_config : {} ports : [167cf55f-d2be-48e2-b81c-fcaa0094125b, 2deee00a-86ca-4a4a-8466-682beb2da724, eba98d21-a6d8-4a17-9303-98eb760927ab] protocols : [] rstp_enable : false rstp_status : {} sflow : [] status : {} stp_enable : false _uuid : 6a3b363d-99c7-47b6-9c30-167fbf18cbd8 auto_attach : [] controller : [] datapath_id : "00005e94f53c221f" datapath_type : netdev datapath_version : "<built-in>" external_ids : {ct-zone-049ede3f-a6b8-4498-a278-aa50f69a9340="4", ct-zone-5ba9d829-5034-4f6e-9c50-84112d316eea="3", ct-zone-65177e75-c36c-44f8-b980-8d129bad6b05_dnat="7", ct-zone-65177e75-c36c-44f8-b980-8d129bad6b05_snat="8", ct-zone-7e87f5da-3510-42aa-85b3-b87e3ed53cbd_dnat="2", ct-zone-7e87f5da-3510-42aa-85b3-b87e3ed53cbd_snat="1", ct-zone-f12fcb10-d5f1-4b96-8787-bfc5b5dee282_dnat="6", ct-zone-f12fcb10-d5f1-4b96-8787-bfc5b5dee282_snat="5", netplan="true", "netplan/global/set-fail-mode"=standalone, "netplan/mcast_snooping_enable"="false", "netplan/rstp_enable"="false", ovn-nb-cfg="119", ovn-nb-cfg-ts="1675915566313", ovn-startup-ts="1675897357360"} fail_mode : secure flood_vlans : [] flow_tables : {} ipfix : [] mcast_snooping_enable: false mirrors : [] name : br-int netflow : [] other_config : {disable-in-band="true", hwaddr="5e:94:f5:3c:22:1f"} ports : [0e30606b-00ff-4202-83a7-57505987df79, 4bf11193-ac2f-4101-9eb9-102b5c5e8bf5, 5a20376a-6ec3-49b3-af74-4ecf04636fb2, 62ef10f0-0267-42f7-ac3a-49b8b9e6d816, 8d46690a-3ea8-420f-9bf3-d2aac5f22729, a6eb963a-c410-477c-b11c-4e02ecb17450, bbc9526a-836e-42d5-a2af-85f344eeba8a, cd7200a2-834e-4488-b8ed-3b61e881d6d0, d13d01ee-9fe8-4f21-ab12-831697870e34, d9fa4b5c-77ce-42af-8014-e1f21102f2c4, f6cb742a-2afa-4f00-87d5-8c07067573f3] protocols : [] rstp_enable : false rstp_status : {} sflow : [] status : {} stp_enable : false _uuid : d2d5b32e-4089-493b-870a-aa056e311b92 auto_attach : [] controller : [] datapath_id : "00002eb3d5d23b49" datapath_type : netdev datapath_version : "<built-in>" external_ids : {netplan="true", "netplan/global/set-fail-mode"=standalone, "netplan/mcast_snooping_enable"="false", "netplan/rstp_enable"="false"} fail_mode : standalone flood_vlans : [] flow_tables : {} ipfix : [] mcast_snooping_enable: false mirrors : [] name : br-provider netflow : [] other_config : {} ports : [43d1234c-7dfb-450f-90fb-80c67bac0a9b, 811af772-eac0-4985-8125-a65958bb8c20, 87123c6a-554f-4d51-90fe-14ed709a95a9] protocols : [] rstp_enable : false rstp_status : {} sflow : [] status : {} stp_enable : false root@controller03:~# ovn-sbctl list Chassis "673c46a0-d9a1-40f8-a164-537693fabf95" _uuid : d966cc0e-14cb-4779-b433-d681849f54cd encaps : [afc6b6bb-3698-42ec-a269-579fd4bfdf27] external_ids : {} hostname : compute01 name : "673c46a0-d9a1-40f8-a164-537693fabf95" nb_cfg : 0 other_config : {ct-no-masked-label="true", datapath-type=netdev, iface-types="bareudp,dpdk,dpdkvhostuser,dpdkvhostuserclient,erspan,geneve,gre,gtpu,internal,ip6erspan,ip6gre,lisp,patch,stt,system,tap,vxlan", is-interconn="false", mac-binding-timestamp="true", ovn-bridge-mappings="provider:br-provider", ovn-chassis-mac-mappings="", ovn-cms-options="", ovn-enable-lflow-cache="true", ovn-limit-lflow-cache="", ovn-memlimit-lflow-cache-kb="", ovn-monitor-all="false", ovn-trim-limit-lflow-cache="", ovn-trim-timeout-ms="", ovn-trim-wmark-perc-lflow-cache="", port-up-notif="true"} transport_zones : [] vtep_logical_switches: [] Any clue about this situation? Best regards.