diff --git a/neutron_lbaas/db/loadbalancer/loadbalancer_db.py b/neutron_lbaas/db/loadbalancer/loadbalancer_db.py
index 08597c856..f0d385b3e 100644
--- a/neutron_lbaas/db/loadbalancer/loadbalancer_db.py
+++ b/neutron_lbaas/db/loadbalancer/loadbalancer_db.py
@@ -13,7 +13,6 @@
 #    under the License.
 #
 
-from neutron.api.v2 import attributes
 from neutron.callbacks import events
 from neutron.callbacks import registry
 from neutron.callbacks import resources
@@ -326,7 +325,7 @@ class LoadBalancerPluginDb(loadbalancer.LoadBalancerPluginBase,
         # resolve subnet and create port
         subnet = self._core_plugin.get_subnet(context, subnet_id)
         fixed_ip = {'subnet_id': subnet['id']}
-        if ip_address and ip_address != attributes.ATTR_NOT_SPECIFIED:
+        if ip_address and ip_address != n_constants.ATTR_NOT_SPECIFIED:
             fixed_ip['ip_address'] = ip_address
             if subnet.get('gateway_ip') == ip_address:
                 raise n_exc.IpAddressInUse(net_id=subnet['network_id'],
@@ -336,7 +335,7 @@ class LoadBalancerPluginDb(loadbalancer.LoadBalancerPluginBase,
             'tenant_id': vip_db.tenant_id,
             'name': 'vip-' + vip_db.id,
             'network_id': subnet['network_id'],
-            'mac_address': attributes.ATTR_NOT_SPECIFIED,
+            'mac_address': n_constants.ATTR_NOT_SPECIFIED,
             'admin_state_up': False,
             'device_id': '',
             'device_owner': n_constants.DEVICE_OWNER_LOADBALANCER,
diff --git a/neutron_lbaas/db/loadbalancer/loadbalancer_dbv2.py b/neutron_lbaas/db/loadbalancer/loadbalancer_dbv2.py
index 9ca25ddb2..a845d4f09 100644
--- a/neutron_lbaas/db/loadbalancer/loadbalancer_dbv2.py
+++ b/neutron_lbaas/db/loadbalancer/loadbalancer_dbv2.py
@@ -15,7 +15,6 @@
 
 import re
 
-from neutron.api.v2 import attributes
 from neutron.callbacks import events
 from neutron.callbacks import registry
 from neutron.callbacks import resources
@@ -93,14 +92,14 @@ class LoadBalancerPluginDbv2(base_db.CommonDbMixin,
         # resolve subnet and create port
         subnet = self._core_plugin.get_subnet(context, lb_db.vip_subnet_id)
         fixed_ip = {'subnet_id': subnet['id']}
-        if ip_address and ip_address != attributes.ATTR_NOT_SPECIFIED:
+        if ip_address and ip_address != n_constants.ATTR_NOT_SPECIFIED:
             fixed_ip['ip_address'] = ip_address
 
         port_data = {
             'tenant_id': lb_db.tenant_id,
             'name': 'loadbalancer-' + lb_db.id,
             'network_id': subnet['network_id'],
-            'mac_address': attributes.ATTR_NOT_SPECIFIED,
+            'mac_address': n_constants.ATTR_NOT_SPECIFIED,
             'admin_state_up': False,
             'device_id': lb_db.id,
             'device_owner': n_constants.DEVICE_OWNER_LOADBALANCERV2,
@@ -385,7 +384,7 @@ class LoadBalancerPluginDbv2(base_db.CommonDbMixin,
                 # Check for unspecified loadbalancer_id and listener_id and
                 # set to None
                 for id in ['loadbalancer_id', 'default_pool_id']:
-                    if listener.get(id) == attributes.ATTR_NOT_SPECIFIED:
+                    if listener.get(id) == n_constants.ATTR_NOT_SPECIFIED:
                         listener[id] = None
 
                 self._validate_listener_data(context, listener)
@@ -668,7 +667,7 @@ class LoadBalancerPluginDbv2(base_db.CommonDbMixin,
             loadbalancer.stats)
 
     def create_l7policy(self, context, l7policy):
-        if l7policy['redirect_pool_id'] == attributes.ATTR_NOT_SPECIFIED:
+        if l7policy['redirect_pool_id'] == n_constants.ATTR_NOT_SPECIFIED:
             l7policy['redirect_pool_id'] = None
         self._validate_l7policy_data(context, l7policy)
 
diff --git a/neutron_lbaas/drivers/radware/v2_driver.py b/neutron_lbaas/drivers/radware/v2_driver.py
index c6aadbad1..33c388475 100644
--- a/neutron_lbaas/drivers/radware/v2_driver.py
+++ b/neutron_lbaas/drivers/radware/v2_driver.py
@@ -17,9 +17,9 @@ import netaddr
 import threading
 import time
 
-from neutron.api.v2 import attributes
 from neutron import context
 from neutron.plugins.common import constants
+from neutron_lib import constants as n_constants
 from oslo_config import cfg
 from oslo_log import helpers as log_helpers
 from oslo_log import log as logging
@@ -493,7 +493,7 @@ class RadwareLBaaSV2Driver(base_v2_driver.RadwareLBaaSBaseV2Driver):
             'tenant_id': lb.tenant_id,
             'name': proxy_port_name,
             'network_id': proxy_port_subnet['network_id'],
-            'mac_address': attributes.ATTR_NOT_SPECIFIED,
+            'mac_address': n_constants.ATTR_NOT_SPECIFIED,
             'admin_state_up': False,
             'device_id': '',
             'device_owner': 'neutron:' + constants.LOADBALANCERV2,
diff --git a/neutron_lbaas/extensions/l7.py b/neutron_lbaas/extensions/l7.py
index ea07be099..97bf562ff 100644
--- a/neutron_lbaas/extensions/l7.py
+++ b/neutron_lbaas/extensions/l7.py
@@ -20,6 +20,7 @@ from neutron.api.v2 import base
 from neutron.api.v2 import resource_helper
 from neutron import manager
 from neutron.plugins.common import constants
+from neutron_lib import constants as n_constants
 from neutron_lib import exceptions as nexception
 
 from neutron_lbaas._i18n import _
@@ -96,7 +97,7 @@ RESOURCE_ATTRIBUTE_MAP = {
                    'is_visible': True},
         'redirect_pool_id': {'allow_post': True, 'allow_put': True,
                              'validate': {'type:uuid_or_none': None},
-                             'default': attr.ATTR_NOT_SPECIFIED,
+                             'default': n_constants.ATTR_NOT_SPECIFIED,
                              'is_visible': True},
         'redirect_url': {'allow_post': True, 'allow_put': True,
                          'validate': {
diff --git a/neutron_lbaas/extensions/loadbalancer.py b/neutron_lbaas/extensions/loadbalancer.py
index a447ce74e..8173cd912 100644
--- a/neutron_lbaas/extensions/loadbalancer.py
+++ b/neutron_lbaas/extensions/loadbalancer.py
@@ -25,6 +25,7 @@ from neutron.api.v2 import resource_helper
 from neutron import manager
 from neutron.plugins.common import constants
 from neutron.services import service_base
+from neutron_lib import constants as n_constants
 from neutron_lib import exceptions as nexception
 
 from neutron_lbaas._i18n import _
@@ -125,7 +126,7 @@ RESOURCE_ATTRIBUTE_MAP = {
                       'validate': {'type:uuid': None},
                       'is_visible': True},
         'address': {'allow_post': True, 'allow_put': False,
-                    'default': attr.ATTR_NOT_SPECIFIED,
+                    'default': n_constants.ATTR_NOT_SPECIFIED,
                     'validate': {'type:ip_address_or_none': None},
                     'is_visible': True},
         'port_id': {'allow_post': False, 'allow_put': False,
@@ -194,8 +195,8 @@ RESOURCE_ATTRIBUTE_MAP = {
                      'validate': {'type:values': ['TCP', 'HTTP', 'HTTPS']},
                      'is_visible': True},
         'provider': {'allow_post': True, 'allow_put': False,
-                     'validate': {'type:string': None},
-                     'is_visible': True, 'default': attr.ATTR_NOT_SPECIFIED},
+                     'validate': {'type:string': None}, 'is_visible': True,
+                     'default': n_constants.ATTR_NOT_SPECIFIED},
         'lb_method': {'allow_post': True, 'allow_put': True,
                       'validate': {'type:values': ['ROUND_ROBIN',
                                                    'LEAST_CONNECTIONS',
diff --git a/neutron_lbaas/extensions/loadbalancerv2.py b/neutron_lbaas/extensions/loadbalancerv2.py
index 47c0df41e..4a65a7865 100644
--- a/neutron_lbaas/extensions/loadbalancerv2.py
+++ b/neutron_lbaas/extensions/loadbalancerv2.py
@@ -27,6 +27,7 @@ from neutron.api.v2 import resource_helper
 from neutron import manager
 from neutron.plugins.common import constants
 from neutron.services import service_base
+from neutron_lib import constants as n_constants
 from neutron_lib import exceptions as nexception
 
 from neutron_lbaas._i18n import _
@@ -164,14 +165,14 @@ RESOURCE_ATTRIBUTE_MAP = {
                           'validate': {'type:uuid': None},
                           'is_visible': True},
         'vip_address': {'allow_post': True, 'allow_put': False,
-                        'default': attr.ATTR_NOT_SPECIFIED,
+                        'default': n_constants.ATTR_NOT_SPECIFIED,
                         'validate': {'type:ip_address_or_none': None},
                         'is_visible': True},
         'vip_port_id': {'allow_post': False, 'allow_put': False,
                         'is_visible': True},
         'provider': {'allow_post': True, 'allow_put': False,
-                     'validate': {'type:string': None},
-                     'is_visible': True, 'default': attr.ATTR_NOT_SPECIFIED},
+                     'validate': {'type:string': None}, 'is_visible': True,
+                     'default': n_constants.ATTR_NOT_SPECIFIED},
         'listeners': {'allow_post': False, 'allow_put': False,
                       'is_visible': True},
         'admin_state_up': {'allow_post': True, 'allow_put': True,
@@ -185,7 +186,7 @@ RESOURCE_ATTRIBUTE_MAP = {
         'flavor_id': {'allow_post': True, 'allow_put': False,
                       'is_visible': True,
                       'validate': {'type:string': attr.NAME_MAX_LEN},
-                      'default': attr.ATTR_NOT_SPECIFIED}
+                      'default': n_constants.ATTR_NOT_SPECIFIED}
     },
     'listeners': {
         'id': {'allow_post': False, 'allow_put': False,
diff --git a/neutron_lbaas/services/loadbalancer/drivers/netscaler/netscaler_driver.py b/neutron_lbaas/services/loadbalancer/drivers/netscaler/netscaler_driver.py
index 828abc3c9..5b68ede2d 100644
--- a/neutron_lbaas/services/loadbalancer/drivers/netscaler/netscaler_driver.py
+++ b/neutron_lbaas/services/loadbalancer/drivers/netscaler/netscaler_driver.py
@@ -12,8 +12,8 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-from neutron.api.v2 import attributes
 from neutron.plugins.common import constants
+from neutron_lib import constants as n_constants
 from oslo_config import cfg
 from oslo_log import log as logging
 
@@ -421,13 +421,13 @@ class NetScalerPluginDriver(abstract_driver.LoadBalancerAbstractDriver):
                                     ip_address):
         subnet = self.plugin._core_plugin.get_subnet(context, subnet_id)
         fixed_ip = {'subnet_id': subnet['id']}
-        if ip_address and ip_address != attributes.ATTR_NOT_SPECIFIED:
+        if ip_address and ip_address != n_constants.ATTR_NOT_SPECIFIED:
             fixed_ip['ip_address'] = ip_address
         port_data = {
             'tenant_id': tenant_id,
             'name': '_lb-snatport-' + subnet_id,
             'network_id': subnet['network_id'],
-            'mac_address': attributes.ATTR_NOT_SPECIFIED,
+            'mac_address': n_constants.ATTR_NOT_SPECIFIED,
             'admin_state_up': False,
             'device_id': '_lb-snatport-' + subnet_id,
             'device_owner': DRIVER_NAME,
diff --git a/neutron_lbaas/services/loadbalancer/drivers/radware/driver.py b/neutron_lbaas/services/loadbalancer/drivers/radware/driver.py
index 56c65982f..026fabab8 100644
--- a/neutron_lbaas/services/loadbalancer/drivers/radware/driver.py
+++ b/neutron_lbaas/services/loadbalancer/drivers/radware/driver.py
@@ -21,9 +21,9 @@ import time
 import eventlet
 eventlet.monkey_patch(thread=True)
 
-from neutron.api.v2 import attributes
 from neutron import context as ncontext
 from neutron.plugins.common import constants
+from neutron_lib import constants as n_constants
 from oslo_config import cfg
 from oslo_log import helpers as log_helpers
 from oslo_log import log as logging
@@ -633,7 +633,7 @@ class LoadBalancerDriver(abstract_driver.LoadBalancerAbstractDriver):
                 'tenant_id': tenant_id,
                 'name': port_name,
                 'network_id': network_id,
-                'mac_address': attributes.ATTR_NOT_SPECIFIED,
+                'mac_address': n_constants.ATTR_NOT_SPECIFIED,
                 'admin_state_up': False,
                 'device_id': '',
                 'device_owner': 'neutron:' + constants.LOADBALANCER,
diff --git a/neutron_lbaas/tests/unit/db/loadbalancer/test_db_loadbalancerv2.py b/neutron_lbaas/tests/unit/db/loadbalancer/test_db_loadbalancerv2.py
index 3853bbbba..60cf69b4d 100644
--- a/neutron_lbaas/tests/unit/db/loadbalancer/test_db_loadbalancerv2.py
+++ b/neutron_lbaas/tests/unit/db/loadbalancer/test_db_loadbalancerv2.py
@@ -18,7 +18,6 @@ import copy
 
 import mock
 from neutron.api import extensions
-from neutron.api.v2 import attributes
 from neutron.common import config
 from neutron import context
 import neutron.db.l3_db  # noqa
@@ -965,7 +964,7 @@ class ListenerTestBase(LbaasPluginDbTestCase):
         super(ListenerTestBase, self).setUp()
         network = self._make_network(self.fmt, 'test-net', True)
         self.test_subnet = self._make_subnet(
-            self.fmt, network, gateway=attributes.ATTR_NOT_SPECIFIED,
+            self.fmt, network, gateway=n_constants.ATTR_NOT_SPECIFIED,
             cidr='10.0.0.0/24')
         self.test_subnet_id = self.test_subnet['subnet']['id']
         lb_res = self._create_loadbalancer(
diff --git a/neutron_lbaas/tests/unit/services/loadbalancer/drivers/radware/test_plugin_driver.py b/neutron_lbaas/tests/unit/services/loadbalancer/drivers/radware/test_plugin_driver.py
index 498e5a09f..7ab66631e 100644
--- a/neutron_lbaas/tests/unit/services/loadbalancer/drivers/radware/test_plugin_driver.py
+++ b/neutron_lbaas/tests/unit/services/loadbalancer/drivers/radware/test_plugin_driver.py
@@ -15,10 +15,10 @@
 import re
 
 import mock
-from neutron.api.v2 import attributes
 from neutron import context
 from neutron import manager
 from neutron.plugins.common import constants
+from neutron_lib import constants as n_constants
 from oslo_config import cfg
 from oslo_serialization import jsonutils
 from six.moves import queue as Queue
@@ -161,7 +161,7 @@ class TestLoadBalancerPlugin(TestLoadBalancerPluginBase):
             'tenant_id': 'tenant_id',
             'name': 'port_name',
             'network_id': 'network_id',
-            'mac_address': attributes.ATTR_NOT_SPECIFIED,
+            'mac_address': n_constants.ATTR_NOT_SPECIFIED,
             'admin_state_up': False,
             'device_id': '',
             'device_owner': 'neutron:' + constants.LOADBALANCER,
diff --git a/neutron_lbaas/tests/unit/services/loadbalancer/drivers/test_driver_base.py b/neutron_lbaas/tests/unit/services/loadbalancer/drivers/test_driver_base.py
index 8122bd104..e961306f2 100644
--- a/neutron_lbaas/tests/unit/services/loadbalancer/drivers/test_driver_base.py
+++ b/neutron_lbaas/tests/unit/services/loadbalancer/drivers/test_driver_base.py
@@ -14,9 +14,9 @@
 #
 
 import mock
-from neutron.api.v2 import attributes
 from neutron import context as ncontext
 from neutron.plugins.common import constants
+from neutron_lib import constants as n_constants
 
 from neutron_lbaas.drivers import driver_mixins
 from neutron_lbaas.extensions import loadbalancerv2
@@ -79,7 +79,7 @@ class TestBaseManager(test_db_loadbalancerv2.LbaasPluginDbTestCase):
         self.manager = DummyManager(self.driver)
         network = self._make_network(self.fmt, 'test-net', True)
         self.subnet = self._make_subnet(
-            self.fmt, network, gateway=attributes.ATTR_NOT_SPECIFIED,
+            self.fmt, network, gateway=n_constants.ATTR_NOT_SPECIFIED,
             cidr='10.0.0.0/24')
         self.subnet_id = self.subnet['subnet']['id']
         self.listener = self._setup_db_data(self.context)
diff --git a/neutron_lbaas/tests/unit/services/loadbalancer/test_loadbalancer_plugin.py b/neutron_lbaas/tests/unit/services/loadbalancer/test_loadbalancer_plugin.py
index 07bb7f011..9032643b2 100644
--- a/neutron_lbaas/tests/unit/services/loadbalancer/test_loadbalancer_plugin.py
+++ b/neutron_lbaas/tests/unit/services/loadbalancer/test_loadbalancer_plugin.py
@@ -16,9 +16,9 @@
 import copy
 
 import mock
-from neutron.api.v2 import attributes as attr
 from neutron.plugins.common import constants
 from neutron.tests.unit.api.v2 import test_base
+from neutron_lib import constants as n_constants
 from oslo_utils import uuidutils
 from webob import exc
 
@@ -178,7 +178,7 @@ class LoadBalancerExtensionTestCase(base.ExtensionTestCase):
         res = self.api.post(_get_path('lb/pools', fmt=self.fmt),
                             self.serialize(data),
                             content_type='application/%s' % self.fmt)
-        data['pool']['provider'] = attr.ATTR_NOT_SPECIFIED
+        data['pool']['provider'] = n_constants.ATTR_NOT_SPECIFIED
         instance.create_pool.assert_called_with(mock.ANY,
                                                 pool=data)
         self.assertEqual(exc.HTTPCreated.code, res.status_int)
@@ -517,8 +517,9 @@ class LoadBalancerExtensionV2TestCase(base.ExtensionTestCase):
         res = self.api.post(_get_path('lbaas/loadbalancers', fmt=self.fmt),
                             self.serialize(data),
                             content_type='application/{0}'.format(self.fmt))
-        data['loadbalancer'].update({'provider': attr.ATTR_NOT_SPECIFIED,
-                                     'flavor_id': attr.ATTR_NOT_SPECIFIED})
+        data['loadbalancer'].update({
+            'provider': n_constants.ATTR_NOT_SPECIFIED,
+            'flavor_id': n_constants.ATTR_NOT_SPECIFIED})
         instance.create_loadbalancer.assert_called_with(mock.ANY,
                                                         loadbalancer=data)
 
diff --git a/neutron_lbaas/tests/unit/test_agent_scheduler.py b/neutron_lbaas/tests/unit/test_agent_scheduler.py
index f1b83cb4f..863081cc9 100644
--- a/neutron_lbaas/tests/unit/test_agent_scheduler.py
+++ b/neutron_lbaas/tests/unit/test_agent_scheduler.py
@@ -30,6 +30,7 @@ from neutron.tests.unit.api import test_extensions
 from neutron.tests.unit.db import test_agentschedulers_db
 import neutron.tests.unit.extensions
 from neutron.tests.unit.extensions import test_agent
+from neutron_lib import constants as n_constants
 import six
 from webob import exc
 
@@ -172,8 +173,8 @@ class LBaaSAgentSchedulerTestCase(test_agent.AgentDBTestMixIn,
             'loadbalancer': {
                 'vip_subnet_id': subnet['id'],
                 'provider': 'lbaas',
-                'flavor_id': attributes.ATTR_NOT_SPECIFIED,
-                'vip_address': attributes.ATTR_NOT_SPECIFIED,
+                'flavor_id': n_constants.ATTR_NOT_SPECIFIED,
+                'vip_address': n_constants.ATTR_NOT_SPECIFIED,
                 'admin_state_up': True,
                 'tenant_id': self._tenant_id}}
         self.assertRaises(lbaas_agentschedulerv2.NoEligibleLbaasAgent,
@@ -207,8 +208,8 @@ class LBaaSAgentSchedulerTestCase(test_agent.AgentDBTestMixIn,
                 'loadbalancer': {
                     'vip_subnet_id': subnet['id'],
                     'provider': 'lbaas',
-                    'flavor_id': attributes.ATTR_NOT_SPECIFIED,
-                    'vip_address': attributes.ATTR_NOT_SPECIFIED,
+                    'flavor_id': n_constants.ATTR_NOT_SPECIFIED,
+                    'vip_address': n_constants.ATTR_NOT_SPECIFIED,
                     'admin_state_up': True,
                     'tenant_id': self._tenant_id}}
             self.assertRaises(lbaas_agentschedulerv2.NoEligibleLbaasAgent,