Created attachment 1163031 [details]
binding secceeded controller

Description of problem:
[Neutron] - binding_failed when the binding:host_id is ip and not hostname. 

If installing the server in rhev with ip as the address instead a hostname(fqdn), and then trying to run VM using a neutron network, the binding failing and we can't get ip fron neutron's dhcp. 
Once installing the server with hostname and running the VM, binding succeeded and VM got ip from neutron's dhcp.  

Version-Release number of selected component (if applicable):
4.1.0-0.0.master.20160526111325.git538ad4f.el7.centos

How reproducible:
100

Steps to Reproduce:
Setup:
- Install neutron external provider
- Create network on the provider and import to rhev
- Install neutron packages and vdsm-openstacknet-hook on the host 
1. Install the host in rhev using the hostname as the address
2. Add vNIC with neutron's profile to a VM and run it

- Remove the server 

3. Install the host in rhev using an ip as the address
4. Run the VM

Actual results:

Step 2. binding succeeded, VM got ip --> 

da219d32-84e6-406a-9f7e-e7d7fa63e45f | nic1 | ACTIVE | oVirt                    | red-vds2.qa.lab.tlv.redhat.com

admin_state_up        | True                                                                                                |
| allowed_address_pairs |                                                                                                     |
| binding:host_id       | red-vds2.qa.lab.tlv.redhat.com                                                                      |
| binding:profile       | {}                                                                                                  |
| binding:vif_details   | {"port_filter": true, "ovs_hybrid_plug": true}                                                      |
| binding:vif_type      | ovs                                                                                                 |
| binding:vnic_type     | normal                                                                                              |
| device_id             | 422adc9b-e0a8-463e-b998-ddfddc304ba0                                                                |
| device_owner          | oVirt                                                                                               |
| dns_assignment        | {"hostname": "host-12-0-0-20", "ip_address": "12.0.0.20", "fqdn": "host-12-0-0-20.openstacklocal."}

- Step 4 -->

binding failed and vm didn't get the ip

16caf482-ac4e-40a8-b364-b9c48b38900d | nic1 | DOWN   | oVirt                    | 10.35.128.9

admin_state_up        | True                                                                                                |
| allowed_address_pairs |                                                                                                     |
| binding:host_id       | 10.35.128.9                                                                                         |
| binding:profile       | {}                                                                                                  |
| binding:vif_details   | {}                                                                                                  |
| binding:vif_type      | binding_failed                                                                                      |
| binding:vnic_type     | normal                                                                                              |
| device_id             | 422adc9b-e0a8-463e-b998-ddfddc304ba0                                                                |
| device_owner          | oVirt                                                                                               |
| dns_assignment        | {"hostname": "host-12-0-0-14", "ip_address": "12.0.0.14", "fqdn": "host-12-0-0-14.openstacklocal."}
 

Expected results:
Should work with ip and hostname as the address of the host. 

Additional info: