diff --git a/quantum/db/db_base_plugin_v2.py b/quantum/db/db_base_plugin_v2.py
index 1324d2b334..0eb995b135 100644
--- a/quantum/db/db_base_plugin_v2.py
+++ b/quantum/db/db_base_plugin_v2.py
@@ -413,7 +413,7 @@ class QuantumDbPluginV2(quantum_plugin_base_v2.QuantumPluginBaseV2):
                                         subnet_id=subnet_id).delete()
 
     @staticmethod
-    def _generate_ip(context, network_id, subnets):
+    def _generate_ip(context, subnets):
         """Generate an IP address.
 
         The IP address will be generated from one of the subnets defined on
@@ -444,7 +444,7 @@ class QuantumDbPluginV2(quantum_plugin_base_v2.QuantumPluginBaseV2):
                 # increment the first free
                 range['first_ip'] = str(netaddr.IPAddress(ip_address) + 1)
             return {'ip_address': ip_address, 'subnet_id': subnet['id']}
-        raise q_exc.IpAddressGenerationFailure(net_id=network_id)
+        raise q_exc.IpAddressGenerationFailure(net_id=subnets[0]['network_id'])
 
     @staticmethod
     def _allocate_specific_ip(context, subnet_id, ip_address):
@@ -607,7 +607,7 @@ class QuantumDbPluginV2(quantum_plugin_base_v2.QuantumPluginBaseV2):
             else:
                 subnets = [self._get_subnet(context, fixed['subnet_id'])]
                 # IP address allocation
-                result = self._generate_ip(context, network, subnets)
+                result = self._generate_ip(context, subnets)
                 ips.append({'ip_address': result['ip_address'],
                             'subnet_id': result['subnet_id']})
         return ips
@@ -673,8 +673,7 @@ class QuantumDbPluginV2(quantum_plugin_base_v2.QuantumPluginBaseV2):
             version_subnets = [v4, v6]
             for subnets in version_subnets:
                 if subnets:
-                    result = QuantumDbPluginV2._generate_ip(context, network,
-                                                            subnets)
+                    result = QuantumDbPluginV2._generate_ip(context, subnets)
                     ips.append({'ip_address': result['ip_address'],
                                 'subnet_id': result['subnet_id']})
         return ips
diff --git a/quantum/tests/unit/test_db_plugin.py b/quantum/tests/unit/test_db_plugin.py
index 57eca29548..822f280a7b 100644
--- a/quantum/tests/unit/test_db_plugin.py
+++ b/quantum/tests/unit/test_db_plugin.py
@@ -873,6 +873,16 @@ fixed_ips=ip_address%%3D%s&fixed_ips=ip_address%%3D%s&fixed_ips=subnet_id%%3D%s
                 self.assertEqual(res['port']['fixed_ips'],
                                  data['port']['fixed_ips'])
 
+    def test_no_more_port_exception(self):
+        fmt = 'json'
+        with self.subnet(cidr='10.0.0.0/32') as subnet:
+            id = subnet['subnet']['network_id']
+            res = self._create_port(fmt, id)
+            data = self.deserialize(fmt, res)
+            msg = str(q_exc.IpAddressGenerationFailure(net_id=id))
+            self.assertEqual(data['QuantumError'], msg)
+            self.assertEqual(res.status_int, 409)
+
     def test_update_port_update_ip(self):
         """Test update of port IP.