diff --git a/nova/network/quantumv2/api.py b/nova/network/quantumv2/api.py
index cdc892eba60..506c3b32bb5 100644
--- a/nova/network/quantumv2/api.py
+++ b/nova/network/quantumv2/api.py
@@ -31,6 +31,7 @@
 from nova.network import quantumv2
 from nova.network.security_group import openstack_driver
 from nova.openstack.common import excutils
+from nova.openstack.common import jsonutils
 from nova.openstack.common import log as logging
 from nova.openstack.common import uuidutils
 
@@ -792,12 +793,18 @@ def _build_network_info_model(self, context, instance, networks=None):
         data = client.list_ports(**search_opts)
         ports = data.get('ports', [])
         if networks is None:
+            # retrieve networks from info_cache to get correct nic order
+            network_cache = self.conductor_api.instance_get_by_uuid(
+                context, instance['uuid'])['info_cache']['network_info']
+            network_cache = jsonutils.loads(network_cache)
+            net_ids = [iface['network']['id'] for iface in network_cache]
             networks = self._get_available_networks(context,
                                                     instance['project_id'])
 
         # ensure ports are in preferred network order, and filter out
         # those not attached to one of the provided list of networks
-        net_ids = [n['id'] for n in networks]
+        else:
+            net_ids = [n['id'] for n in networks]
         ports = [port for port in ports if port['network_id'] in net_ids]
         _ensure_requested_network_ordering(lambda x: x['network_id'],
                                            ports, net_ids)
diff --git a/nova/tests/network/test_quantumv2.py b/nova/tests/network/test_quantumv2.py
index c0773e8ae67..57ccfd80944 100644
--- a/nova/tests/network/test_quantumv2.py
+++ b/nova/tests/network/test_quantumv2.py
@@ -23,11 +23,13 @@
 from quantumclient.v2_0 import client
 
 from nova.compute import instance_types
+from nova.conductor import api as conductor_api
 from nova import context
 from nova import exception
 from nova.network import model
 from nova.network import quantumv2
 from nova.network.quantumv2 import api as quantumapi
+from nova.openstack.common import jsonutils
 from nova import test
 from nova import utils
 
@@ -269,6 +271,15 @@ def _get_instance_nw_info(self, number):
                                           self.instance['uuid'],
                                           mox.IgnoreArg())
         port_data = number == 1 and self.port_data1 or self.port_data2
+        self.mox.StubOutWithMock(conductor_api.API,
+                                 'instance_get_by_uuid')
+        net_info_cache = []
+        for port in port_data:
+            net_info_cache.append({"network": {"id": port['network_id']}})
+        info_cache = {'info_cache': {'network_info':
+                                     jsonutils.dumps(net_info_cache)}}
+        api.conductor_api.instance_get_by_uuid(
+            mox.IgnoreArg(), mox.IgnoreArg()).AndReturn(info_cache)
         self.moxed_client.list_ports(
             tenant_id=self.instance['project_id'],
             device_id=self.instance['uuid']).AndReturn(
@@ -368,6 +379,16 @@ def test_get_instance_nw_info_without_subnet(self):
         quantumv2.get_client(mox.IgnoreArg(),
                              admin=True).MultipleTimes().AndReturn(
             self.moxed_client)
+        self.mox.StubOutWithMock(conductor_api.API,
+                                 'instance_get_by_uuid')
+        net_info_cache = []
+        for port in self.port_data3:
+            net_info_cache.append({"network": {"id": port['network_id']}})
+        info_cache = {'info_cache': {'network_info':
+                                     jsonutils.dumps(net_info_cache)}}
+
+        api.conductor_api.instance_get_by_uuid(
+            mox.IgnoreArg(), mox.IgnoreArg()).AndReturn(info_cache)
         self.mox.ReplayAll()
 
         nw_inf = api.get_instance_nw_info(self.context,
@@ -730,7 +751,17 @@ def test_deallocate_for_instance_2(self):
     def _test_deallocate_port_for_instance(self, number):
         port_data = number == 1 and self.port_data1 or self.port_data2
         self.moxed_client.delete_port(port_data[0]['id'])
+        self.mox.StubOutWithMock(conductor_api.API,
+                                 'instance_get_by_uuid')
+        net_info_cache = []
+        for port in port_data:
+            net_info_cache.append({"network": {"id": port['network_id']}})
+        info_cache = {'info_cache': {'network_info':
+                                     jsonutils.dumps(net_info_cache)}}
 
+        api = quantumapi.API()
+        api.conductor_api.instance_get_by_uuid(
+            mox.IgnoreArg(), mox.IgnoreArg()).AndReturn(info_cache)
         nets = [port_data[0]['network_id']]
         quantumv2.get_client(mox.IgnoreArg(), admin=True).AndReturn(
             self.moxed_client)
@@ -758,7 +789,6 @@ def _test_deallocate_port_for_instance(self, number):
 
         self.mox.ReplayAll()
 
-        api = quantumapi.API()
         nwinfo = api.deallocate_port_for_instance(self.context, self.instance,
                                                   port_data[0]['id'])
         self.assertEqual(len(nwinfo), len(port_data[1:]))