Works for me:

stack@tm-devstack01:~$ source openrc admin                                                                                                                                        

stack@tm-devstack01:~$ neutron net-create netfoo
Created a new network:
+---------------------------+--------------------------------------+
| Field                     | Value                                |
+---------------------------+--------------------------------------+
| admin_state_up            | True                                 |
| id                        | 1268a2b4-f0cb-4f01-b1e4-033cbe21eee9 |
| mtu                       | 0                                    |
| name                      | netfoo                               |
| port_security_enabled     | True                                 |
| provider:network_type     | vxlan                                |
| provider:physical_network |                                      |
| provider:segmentation_id  | 1040                                 |
| router:external           | False                                |
| shared                    | False                                |
| status                    | ACTIVE                               |
| subnets                   |                                      |
| tenant_id                 | cc432618b9fa4275b324346b9f8a4398     |
+---------------------------+--------------------------------------+
stack@tm-devstack01:~$ neutron bgpvpn-create --route-targets 64512:77
Created a new bgpvpn:
+----------------------+--------------------------------------+
| Field                | Value                                |
+----------------------+--------------------------------------+
| auto_aggregate       | True                                 |
| export_targets       |                                      |
| id                   | 9b6b6e34-85d1-4a1a-b0b2-5ce336fb8075 |
| import_targets       |                                      |
| name                 |                                      |
| networks             |                                      |
| route_distinguishers |                                      |
| route_targets        | 64512:77                             |
| tenant_id            | cc432618b9fa4275b324346b9f8a4398     |
| type                 | l3                                   |
+----------------------+--------------------------------------+
stack@tm-devstack01:~$ neutron bgpvpn-list
+--------------------------------------+------+------+---------------+----------------+----------------+----------------------------------+----------+
| id                                   | name | type | route_targets | import_targets | export_targets | tenant_id                        | networks |
+--------------------------------------+------+------+---------------+----------------+----------------+----------------------------------+----------+
| 9b6b6e34-85d1-4a1a-b0b2-5ce336fb8075 |      | l3   | [u'64512:77'] | []             | []             | cc432618b9fa4275b324346b9f8a4398 | []       |
+--------------------------------------+------+------+---------------+----------------+----------------+----------------------------------+----------+
stack@tm-devstack01:~$ neutron bgpvpn-net-assoc-create --tenant-id cc432618b9fa4275b324346b9f8a4398 --network netfoo 9b6b6e34-85d1-4a1a-b0b2-5ce336fb8075
Created a new network_association:
+------------+--------------------------------------+
| Field      | Value                                |
+------------+--------------------------------------+
| id         | 0670ecbf-e9e6-4a12-beda-2cfc9456f6b6 |
| network_id | 1268a2b4-f0cb-4f01-b1e4-033cbe21eee9 |
+------------+--------------------------------------+