diff --git a/openstackclient/common/clientmanager.py b/openstackclient/common/clientmanager.py
index c77a7848..742509e4 100644
--- a/openstackclient/common/clientmanager.py
+++ b/openstackclient/common/clientmanager.py
@@ -86,7 +86,7 @@ class ClientManager(object):
         self._pw_callback = pw_func
         self._url = self._cli_options.auth.get('url', None)
         self._region_name = self._cli_options.region_name
-        self._endpoint_type = self._cli_options.endpoint_type
+        self._interface = self._cli_options.interface
 
         self.timing = self._cli_options.timing
 
@@ -185,22 +185,22 @@ class ClientManager(object):
         return self._auth_ref
 
     def get_endpoint_for_service_type(self, service_type, region_name=None,
-                                      endpoint_type='public'):
+                                      interface='public'):
         """Return the endpoint URL for the service type."""
-        if not endpoint_type:
-            endpoint_type = 'public'
+        if not interface:
+            interface = 'public'
         # See if we are using password flow auth, i.e. we have a
         # service catalog to select endpoints from
         if self.auth_ref:
             endpoint = self.auth_ref.service_catalog.url_for(
                 service_type=service_type,
                 region_name=region_name,
-                endpoint_type=endpoint_type,
+                endpoint_type=interface,
             )
         else:
             # Get the passed endpoint directly from the auth plugin
             endpoint = self.auth.get_endpoint(self.session,
-                                              interface=endpoint_type)
+                                              interface=interface)
         return endpoint
 
 
diff --git a/openstackclient/shell.py b/openstackclient/shell.py
index b4e5904c..edeffdfb 100644
--- a/openstackclient/shell.py
+++ b/openstackclient/shell.py
@@ -209,14 +209,14 @@ class OpenStackShell(app.App):
                  DEFAULT_DOMAIN +
                  ' (Env: OS_DEFAULT_DOMAIN)')
         parser.add_argument(
-            '--os-endpoint-type',
-            metavar='<endpoint-type>',
-            dest='endpoint_type',
+            '--os-interface',
+            metavar='<interface>',
+            dest='interface',
             choices=['admin', 'public', 'internal'],
-            default=utils.env('OS_ENDPOINT_TYPE'),
-            help='Select an endpoint type.'
-                 ' Valid endpoint types: [admin, public, internal].'
-                 ' (Env: OS_ENDPOINT_TYPE)')
+            default=utils.env('OS_INTERFACE'),
+            help='Select an interface type.'
+                 ' Valid interface types: [admin, public, internal].'
+                 ' (Env: OS_INTERFACE)')
         parser.add_argument(
             '--timing',
             default=False,
@@ -263,10 +263,10 @@ class OpenStackShell(app.App):
             self.options.project_name = tenant_name
 
         # Do configuration file handling
-        # Ignore the default value of endpoint_type. Only if it is set later
+        # Ignore the default value of interface. Only if it is set later
         # will it be used.
         cc = cloud_config.OpenStackConfig(
-            override_defaults={'endpoint_type': None, })
+            override_defaults={'interface': None, })
         self.log.debug("defaults: %s", cc.defaults)
 
         self.cloud = cc.get_one_cloud(
diff --git a/openstackclient/tests/common/test_clientmanager.py b/openstackclient/tests/common/test_clientmanager.py
index e86ef509..29cc59ed 100644
--- a/openstackclient/tests/common/test_clientmanager.py
+++ b/openstackclient/tests/common/test_clientmanager.py
@@ -54,7 +54,7 @@ class FakeOptions(object):
         self.identity_api_version = '2.0'
         self.timing = None
         self.region_name = None
-        self.endpoint_type = None
+        self.interface = None
         self.url = None
         self.auth = {}
         self.default_domain = 'default'
@@ -124,7 +124,7 @@ class TestClientManager(utils.TestCase):
                     auth_url=fakes.AUTH_URL,
                 ),
                 auth_type='v2token',
-                endpoint_type=fakes.ENDPOINT_TYPE,
+                interface=fakes.INTERFACE,
                 region_name=fakes.REGION_NAME,
             ),
             api_version=API_VERSION,
@@ -141,8 +141,8 @@ class TestClientManager(utils.TestCase):
             auth_v2.Token,
         )
         self.assertEqual(
-            fakes.ENDPOINT_TYPE,
-            client_manager._endpoint_type,
+            fakes.INTERFACE,
+            client_manager._interface,
         )
         self.assertEqual(
             fakes.REGION_NAME,
diff --git a/openstackclient/tests/fakes.py b/openstackclient/tests/fakes.py
index a9322ec3..ff69c190 100644
--- a/openstackclient/tests/fakes.py
+++ b/openstackclient/tests/fakes.py
@@ -27,7 +27,7 @@ USERNAME = "itchy"
 PASSWORD = "scratchy"
 PROJECT_NAME = "poochie"
 REGION_NAME = "richie"
-ENDPOINT_TYPE = "catchy"
+INTERFACE = "catchy"
 
 TEST_RESPONSE_DICT = fixture.V2Token(token_id=AUTH_TOKEN,
                                      user_name=USERNAME)
diff --git a/openstackclient/tests/test_shell.py b/openstackclient/tests/test_shell.py
index 0b4ff685..e2f0580b 100644
--- a/openstackclient/tests/test_shell.py
+++ b/openstackclient/tests/test_shell.py
@@ -39,7 +39,7 @@ DEFAULT_REGION_NAME = "ZZ9_Plural_Z_Alpha"
 DEFAULT_TOKEN = "token"
 DEFAULT_SERVICE_URL = "http://127.0.0.1:8771/v3.0/"
 DEFAULT_AUTH_PLUGIN = "v2password"
-DEFAULT_ENDPOINT_TYPE = "internal"
+DEFAULT_INTERFACE = "internal"
 
 DEFAULT_COMPUTE_API_VERSION = "2"
 DEFAULT_IDENTITY_API_VERSION = "2"
@@ -63,7 +63,7 @@ CLOUD_1 = {
             },
             'region_name': 'occ-cloud',
             'donut': 'glazed',
-            'endpoint_type': 'public',
+            'interface': 'public',
         }
     }
 }
@@ -107,7 +107,7 @@ global_options = {
     '--os-default-domain': (DEFAULT_DOMAIN_NAME, True, True),
     '--os-cacert': ('/dev/null', True, True),
     '--timing': (True, True, False),
-    '--os-endpoint-type': (DEFAULT_ENDPOINT_TYPE, True, True)
+    '--os-interface': (DEFAULT_INTERFACE, True, True)
 }
 
 auth_options = {
@@ -127,7 +127,7 @@ auth_options = {
     '--os-auth-type': ("v2password", True, True),
     '--os-token': (DEFAULT_TOKEN, True, True),
     '--os-url': (DEFAULT_SERVICE_URL, True, True),
-    '--os-endpoint-type': (DEFAULT_ENDPOINT_TYPE, True, True),
+    '--os-interface': (DEFAULT_INTERFACE, True, True),
 }
 
 
@@ -616,7 +616,7 @@ class TestShellCli(TestShell):
         )
         self.assertEqual(
             'public',
-            _shell.cloud.config['endpoint_type'],
+            _shell.cloud.config['interface'],
         )
 
     @mock.patch("os_client_config.config.OpenStackConfig._load_vendor_file")