Hi everyone I tried to integrate Openstack train with Opendaylight magnesium and my references were [1] and [2] but after doing all the steps, the instance failed to launch. I changed port_binding_controller in [ml2_odl] section in the ml2_conf.ini file from pseudo-agentdb-binding to legacy-port-binding and then the instance launched but the status of router interfaces was still down. I have a controller node and a compute node. and Opendaylight runs on the controller node. nova-compute.log: INFO nova.virt.libvirt.driver [-] [instance: 975fa79e-6567-4385-be87-9d12a8eb3e94] Instance destroyed successfully. 2021-01-02 12:33:23.383 25919 ERROR vif_plug_ovs.ovsdb.impl_vsctl [req-a0a7ebf0-7e63-4c60-a8d2-07c05f1aa4f4 04c7685a2166481a9ace54eb5e71f6e5 ca28ee1038254649ad133d5f09f7a186 - default default] Unable to execute ['ovs-vsctl', '--timeout=120', '--oneline', '--format=json', '--db=tcp: 127.0.0.1:6640', '--', '--if-exists', 'del-port', 'br-int', 'tap50eb0b68-a4']. Exception: Unexpected error while running command. Command: ovs-vsctl --timeout=120 --oneline --format=json --db=tcp: 127.0.0.1:6640 -- --if-exists del-port br-int tap50eb0b68-a4 Exit code: 1 Stdout: '' Stderr: 'ovs-vsctl: tcp:127.0.0.1:6640: database connection failed (Connection refused)\n': oslo_concurrency.processutils.ProcessExecutionError: Unexpected error while running command. controller ovs: Manager "tcp:192.168.222.48:6640" is_connected: true Bridge br-int Controller "tcp:192.168.222.48:6653" is_connected: true fail_mode: secure Port tune52c5c73a50 Interface tune52c5c73a50 type: vxlan options: {key=flow, local_ip="10.0.0.31", remote_ip="10.0.0.11"} Port br-int Interface br-int type: internal Bridge br-ex Port br-ex Interface br-ex type: internal Port ens160 Interface ens160 ovs_version: "2.13.1" compute ovs: Manager "tcp:192.168.222.48:6640" is_connected: true Bridge br-int Controller "tcp:192.168.222.48:6653" is_connected: true fail_mode: secure Port br-int Interface br-int type: internal Port tun34b3712d975 Interface tun34b3712d975 type: vxlan options: {key=flow, local_ip="10.0.0.11", remote_ip="10.0.0.11"} Port tund5123ce5b8a Interface tund5123ce5b8a type: vxlan options: {key=flow, local_ip="10.0.0.11", remote_ip="10.0.0.31"} ovs_version: "2.13.1"