Hello guys. I am using openstack yoga with kolla ansible. When I migrate: instance1 from host A to host B after that I cannot ping this instance(telnet also). I must restart neutron_openvswitch_agent or move this instance back to host B then this problem has gone. this is my settings: ----------------- neutron.conf ----------------- [nova] live_migration_events = True ------------------------------------------------ ----------------- nova.conf ----------------- [DEFAULT] vif_plugging_timeout = 600 vif_plugging_is_fatal = False debug = True [compute] live_migration_wait_for_vif_plug = True [workarounds] enable_qemu_monitor_announce_self = True ----------------- openvswitch_agent.ini----------------- [securitygroup] firewall_driver = openvswitch [ovs] openflow_processed_per_port = true I check nova, neutron, ops logs but they are ok. Thank you. Nguyen Huu Khoi