Comment 7 for bug 1567843

 For more detail info:
 I will create a VM with vxlan network. The VM will be created failed at process "libvirt.driver._create_domain".

the current ovs-info:
[root@localhost ~]# brctl show
bridge name bridge id STP enabled interfaces
virbr0 8000.525400b00efc yes virbr0-nic
[root@localhost ~]#

create VM:
[root@localhost devstack]# nova list
+----+------+--------+------------+-------------+----------+
| ID | Name | Status | Task State | Power State | Networks |
+----+------+--------+------------+-------------+----------+
+----+------+--------+------------+-------------+----------+
[root@localhost devstack]# nova boot --flavor m1.tiny --image 5eff06a2-0078-4894-b150-3681c0a75e96 --nic net-id=9766bbdb-9f6c-42d3-abbe-d948ad95a1f5 vm_test
+--------------------------------------+----------------------------------------------------------------+
| Property | Value |
+--------------------------------------+----------------------------------------------------------------+
| OS-DCF:diskConfig | MANUAL |
| OS-EXT-AZ:availability_zone | |
| OS-EXT-SRV-ATTR:host | - |
| OS-EXT-SRV-ATTR:hostname | vm-test |
| OS-EXT-SRV-ATTR:hypervisor_hostname | - |
| OS-EXT-SRV-ATTR:instance_name | instance-00000002 |
| OS-EXT-SRV-ATTR:kernel_id | 92f607a2-3992-4b6e-b381-104f42619e53 |
| OS-EXT-SRV-ATTR:launch_index | 0 |
| OS-EXT-SRV-ATTR:ramdisk_id | 7cdd665d-0aed-4bbc-b582-bea9d955f076 |
| OS-EXT-SRV-ATTR:reservation_id | r-dgfe3hnw |
| OS-EXT-SRV-ATTR:root_device_name | - |
| OS-EXT-SRV-ATTR:user_data | - |
| OS-EXT-STS:power_state | 0 |
| OS-EXT-STS:task_state | scheduling |
| OS-EXT-STS:vm_state | building |
| OS-SRV-USG:launched_at | - |
| OS-SRV-USG:terminated_at | - |
| accessIPv4 | |
| accessIPv6 | |
| adminPass | uAx2X5SeU3k7 |
| config_drive | |
| created | 2016-07-07T14:19:11Z |
| description | - |
| flavor | m1.tiny (1) |
| hostId | |
| host_status | |
| id | 1cb4461e-2457-4b03-be13-e26a141335c4 |
| image | cirros-0.3.4-x86_64-uec (5eff06a2-0078-4894-b150-3681c0a75e96) |
| key_name | - |
| locked | False |
| metadata | {} |
| name | vm_test |
| os-extended-volumes:volumes_attached | [] |
| progress | 0 |
| security_groups | default |
| status | BUILD |
| tags | [] |
| tenant_id | 2c5731b1d71b419092220382c50ce2a1 |
| updated | 2016-07-07T14:19:11Z |
| user_id | 74fb041674644ddfba0cfdd9ba2d2c95 |
+--------------------------------------+----------------------------------------------------------------+
[root@localhost devstack]# nova list
+--------------------------------------+---------+--------+------------+-------------+----------+
| ID | Name | Status | Task State | Power State | Networks |
+--------------------------------------+---------+--------+------------+-------------+----------+
| 1cb4461e-2457-4b03-be13-e26a141335c4 | vm_test | ERROR | - | NOSTATE | |
+--------------------------------------+---------+--------+------------+-------------+----------+
[root@localhost devstack]# nova delete vm_test
Request to delete server vm_test has been accepted.
[root@localhost devstack]# nova list
+----+------+--------+------------+-------------+----------+
| ID | Name | Status | Task State | Power State | Networks |
+----+------+--------+------------+-------------+----------+
+----+------+--------+------------+-------------+----------+
[root@localhost devstack]#

Now, do not unplug-vif correctlly, There are some information was left
[root@localhost ~]# brctl show
bridge name bridge id STP enabled interfaces
qbr2e2fb609-a4 8000.5e21af9a5b6b no qvb2e2fb609-a4
                                                        tap2e2fb609-a4
virbr0 8000.525400b00efc yes virbr0-nic