root@node-2:~# nova list
+--------------------------------------+-------+--------+------------+-------------+-------------------------------------------------------------------------------------+
| ID                                   | Name  | Status | Task State | Power State | Networks                                                                            |
+--------------------------------------+-------+--------+------------+-------------+-------------------------------------------------------------------------------------+
| ad4cdf33-c85c-4cdc-ba7f-6e504ed30270 | alexz | ACTIVE | -          | Running     | net04=192.168.111.3                                                                 |
| 6cd178f3-c18a-4c08-9fe5-6af687ef627a | vm1   | ACTIVE | -          | Running     | net04=192.168.111.5, 192.168.111.6; net04_ext=172.16.0.239; Rally_IntNet=100.0.1.45 |
+--------------------------------------+-------+--------+------------+-------------+-------------------------------------------------------------------------------------+
root@node-2:~# nova interface-attach vm1
ERROR (ClientException): Failed to attach interface (HTTP 500) (Request-ID: req-44dbd07b-6f05-4ae5-a6ec-eb833264bbb7)
root@node-2:~# nova list
+--------------------------------------+-------+--------+------------+-------------+------------------------------------------------------------------------------------------------------------------------------+
| ID                                   | Name  | Status | Task State | Power State | Networks                                                                                                                     |
+--------------------------------------+-------+--------+------------+-------------+------------------------------------------------------------------------------------------------------------------------------+
| ad4cdf33-c85c-4cdc-ba7f-6e504ed30270 | alexz | ACTIVE | -          | Running     | net04=192.168.111.3                                                                                                          |
| 6cd178f3-c18a-4c08-9fe5-6af687ef627a | vm1   | ACTIVE | -          | Running     | net04=192.168.111.5, 192.168.111.6, 192.168.111.7; net04_ext=172.16.0.239, 172.16.0.240; Rally_IntNet=100.0.1.45, 100.0.1.46 |
+--------------------------------------+-------+--------+------------+-------------+------------------------------------------------------------------------------------------------------------------------------+