diff --git a/etc/tempest.conf.sample b/etc/tempest.conf.sample
index 1d368af..a2d3877 100644
--- a/etc/tempest.conf.sample
+++ b/etc/tempest.conf.sample
@@ -553,6 +553,9 @@
 # The mask bits for tenant ipv4 subnets (integer value)
 #tenant_network_mask_bits=28
 
+# Allow the execution of IPv6 tests (boolean value)
+#ipv6_enabled=true
+
 # The cidr block to allocate tenant ipv6 subnets from (string
 # value)
 #tenant_network_v6_cidr=2003::/64
diff --git a/tempest/api/network/test_extra_dhcp_options.py b/tempest/api/network/test_extra_dhcp_options.py
new file mode 100644
index 0000000..ed86d75
--- /dev/null
+++ b/tempest/api/network/test_extra_dhcp_options.py
@@ -0,0 +1,99 @@
+# Copyright 2013 OpenStack Foundation
+# All Rights Reserved.
+#
+#    Licensed under the Apache License, Version 2.0 (the "License"); you may
+#    not use this file except in compliance with the License. You may obtain
+#    a copy of the License at
+#
+#         http://www.apache.org/licenses/LICENSE-2.0
+#
+#    Unless required by applicable law or agreed to in writing, software
+#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+#    License for the specific language governing permissions and limitations
+#    under the License.
+
+from tempest.api.network import base
+from tempest.common.utils import data_utils
+from tempest import test
+
+
+class ExtraDHCPOptionsTestJSON(base.BaseNetworkTest):
+    _interface = 'json'
+
+    """
+    Tests the following operations with the Extra DHCP Options Neutron API
+    extension:
+
+        port create
+        port list
+        port show
+        port update
+
+    v2.0 of the Neutron API is assumed. It is also assumed that the Extra
+    DHCP Options extension is enabled in the [network-feature-enabled]
+    section of etc/tempest.conf
+    """
+
+    @classmethod
+    def setUpClass(cls):
+        super(ExtraDHCPOptionsTestJSON, cls).setUpClass()
+        if not test.is_extension_enabled('extra_dhcp_opt', 'network'):
+            msg = "Extra DHCP Options extension not enabled."
+            raise cls.skipException(msg)
+        cls.network = cls.create_network()
+        cls.subnet = cls.create_subnet(cls.network)
+        cls.port = cls.create_port(cls.network)
+
+    @test.attr(type='smoke')
+    def test_create_list_port_with_extra_dhcp_options(self):
+        # Create a port with Extra DHCP Options
+        extra_dhcp_opts = [
+            {'opt_value': 'pxelinux.0', 'opt_name': 'bootfile-name'},
+            {'opt_value': '123.123.123.123', 'opt_name': 'tftp-server'},
+            {'opt_value': '123.123.123.45', 'opt_name': 'server-ip-address'}
+        ]
+        resp, body = self.client.create_port(
+            network_id=self.network['id'],
+            extra_dhcp_opts=extra_dhcp_opts)
+        self.assertEqual('201', resp['status'])
+        port_id = body['port']['id']
+        self.addCleanup(self.client.delete_port, port_id)
+
+        # Confirm port created has Extra DHCP Options
+        resp, body = self.client.list_ports()
+        self.assertEqual('200', resp['status'])
+        ports = body['ports']
+        port = [p for p in ports if p['id'] == port_id]
+        self.assertTrue(port)
+        self._confirm_extra_dhcp_options(port[0], extra_dhcp_opts)
+
+    @test.attr(type='smoke')
+    def test_update_show_port_with_extra_dhcp_options(self):
+        # Update port with extra dhcp options
+        extra_dhcp_opts = [
+            {'opt_value': 'pxelinux.0', 'opt_name': 'bootfile-name'},
+            {'opt_value': '123.123.123.123', 'opt_name': 'tftp-server'},
+            {'opt_value': '123.123.123.45', 'opt_name': 'server-ip-address'}
+        ]
+        name = data_utils.rand_name('new-port-name')
+        resp, body = self.client.update_port(
+            self.port['id'], name=name, extra_dhcp_opts=extra_dhcp_opts)
+        self.assertEqual('200', resp['status'])
+
+        # Confirm extra dhcp options were added to the port
+        resp, body = self.client.show_port(self.port['id'])
+        self.assertEqual('200', resp['status'])
+        self._confirm_extra_dhcp_options(body['port'], extra_dhcp_opts)
+
+    def _confirm_extra_dhcp_options(self, port, extra_dhcp_opts):
+        retrieved = port['extra_dhcp_opts']
+        self.assertEqual(len(retrieved), len(extra_dhcp_opts))
+        for retrieved_option in retrieved:
+            for option in extra_dhcp_opts:
+                if (retrieved_option['opt_value'] == option['opt_value'] and
+                    retrieved_option['opt_name'] == option['opt_name']):
+                    break
+            else:
+                self.fail('Extra DHCP option not found in port %s' %
+                          str(retrieved_option))
diff --git a/tempest/api/network/test_networks.py b/tempest/api/network/test_networks.py
index 9029b1f..aba2c8e 100644
--- a/tempest/api/network/test_networks.py
+++ b/tempest/api/network/test_networks.py
@@ -467,6 +467,14 @@
     _tenant_network_cidr = CONF.network.tenant_network_v6_cidr
     _tenant_network_mask_bits = CONF.network.tenant_network_v6_mask_bits
 
+    @classmethod
+    def setUpClass(cls):
+        super(NetworksIpV6TestJSON, cls).setUpClass()
+        if not CONF.network.ipv6_enabled:
+            cls.tearDownClass()
+            skip_msg = "IPv6 Tests are disabled."
+            raise cls.skipException(skip_msg)
+
 
 class NetworksIpV6TestXML(NetworksIpV6TestJSON):
     _interface = 'xml'
diff --git a/tempest/auth.py b/tempest/auth.py
index 582cfdd..e1ba13b 100644
--- a/tempest/auth.py
+++ b/tempest/auth.py
@@ -177,7 +177,7 @@
         base_url = self.base_url(filters=filters, auth_data=auth_data)
         # build authenticated request
         # returns new request, it does not touch the original values
-        _headers = copy.deepcopy(headers)
+        _headers = copy.deepcopy(headers) if headers is not None else {}
         _headers['X-Auth-Token'] = token
         if url is None or url == "":
             _url = base_url
@@ -371,7 +371,7 @@
                             ep['region'] == region]
         if len(filtered_catalog) == 0:
             # No matching region, take the first endpoint
-            filtered_catalog = [filtered_catalog[0]]
+            filtered_catalog = [service_catalog[0]]
         # There should be only one match. If not take the first.
         _base_url = filtered_catalog[0].get('url', None)
         if _base_url is None:
diff --git a/tempest/clients.py b/tempest/clients.py
index 3db05e5..8db399a 100644
--- a/tempest/clients.py
+++ b/tempest/clients.py
@@ -13,10 +13,20 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-from tempest import auth
+# Default client libs
+import cinderclient.client
+import glanceclient
+import heatclient.client
+import keystoneclient.exceptions
+import keystoneclient.v2_0.client
+import neutronclient.v2_0.client
+import novaclient.client
+import swiftclient
+
 from tempest.common.rest_client import NegativeRestClient
 from tempest import config
 from tempest import exceptions
+from tempest import manager
 from tempest.openstack.common import log as logging
 from tempest.services.baremetal.v1.client_json import BaremetalClientJSON
 from tempest.services import botoclients
@@ -169,10 +179,10 @@
 LOG = logging.getLogger(__name__)
 
 
-class Manager(object):
+class Manager(manager.Manager):
 
     """
-    Top level manager for OpenStack Compute clients
+    Top level manager for OpenStack tempest clients
     """
 
     def __init__(self, username=None, password=None, tenant_name=None,
@@ -187,153 +197,145 @@
         :param tenant_name: Override of the tenant name
         """
         self.interface = interface
-        self.auth_version = CONF.identity.auth_version
-        # FIXME(andreaf) Change Manager __init__ to accept a credentials dict
-        if username is None or password is None:
-            # Tenant None is a valid use case
-            self.credentials = self.get_default_credentials()
-        else:
-            self.credentials = dict(username=username, password=password,
-                                    tenant_name=tenant_name)
-        if self.auth_version == 'v3':
-            self.credentials['domain_name'] = 'Default'
-        # Setup an auth provider
-        auth_provider = self.get_auth_provider(self.credentials)
+        self.client_type = 'tempest'
+        # super cares for credentials validation
+        super(Manager, self).__init__(
+            username=username, password=password, tenant_name=tenant_name)
 
         if self.interface == 'xml':
             self.certificates_client = CertificatesClientXML(
-                auth_provider)
-            self.servers_client = ServersClientXML(auth_provider)
-            self.limits_client = LimitsClientXML(auth_provider)
-            self.images_client = ImagesClientXML(auth_provider)
-            self.keypairs_client = KeyPairsClientXML(auth_provider)
-            self.quotas_client = QuotasClientXML(auth_provider)
-            self.flavors_client = FlavorsClientXML(auth_provider)
-            self.extensions_client = ExtensionsClientXML(auth_provider)
+                self.auth_provider)
+            self.servers_client = ServersClientXML(self.auth_provider)
+            self.limits_client = LimitsClientXML(self.auth_provider)
+            self.images_client = ImagesClientXML(self.auth_provider)
+            self.keypairs_client = KeyPairsClientXML(self.auth_provider)
+            self.quotas_client = QuotasClientXML(self.auth_provider)
+            self.flavors_client = FlavorsClientXML(self.auth_provider)
+            self.extensions_client = ExtensionsClientXML(self.auth_provider)
             self.volumes_extensions_client = VolumesExtensionsClientXML(
-                auth_provider)
+                self.auth_provider)
             self.floating_ips_client = FloatingIPsClientXML(
-                auth_provider)
-            self.backups_client = BackupsClientXML(auth_provider)
-            self.snapshots_client = SnapshotsClientXML(auth_provider)
-            self.volumes_client = VolumesClientXML(auth_provider)
-            self.volumes_v2_client = VolumesV2ClientXML(auth_provider)
+                self.auth_provider)
+            self.backups_client = BackupsClientXML(self.auth_provider)
+            self.snapshots_client = SnapshotsClientXML(self.auth_provider)
+            self.volumes_client = VolumesClientXML(self.auth_provider)
+            self.volumes_v2_client = VolumesV2ClientXML(self.auth_provider)
             self.volume_types_client = VolumeTypesClientXML(
-                auth_provider)
-            self.identity_client = IdentityClientXML(auth_provider)
+                self.auth_provider)
+            self.identity_client = IdentityClientXML(self.auth_provider)
             self.identity_v3_client = IdentityV3ClientXML(
-                auth_provider)
+                self.auth_provider)
             self.security_groups_client = SecurityGroupsClientXML(
-                auth_provider)
-            self.interfaces_client = InterfacesClientXML(auth_provider)
-            self.endpoints_client = EndPointClientXML(auth_provider)
-            self.fixed_ips_client = FixedIPsClientXML(auth_provider)
+                self.auth_provider)
+            self.interfaces_client = InterfacesClientXML(self.auth_provider)
+            self.endpoints_client = EndPointClientXML(self.auth_provider)
+            self.fixed_ips_client = FixedIPsClientXML(self.auth_provider)
             self.availability_zone_client = AvailabilityZoneClientXML(
-                auth_provider)
-            self.service_client = ServiceClientXML(auth_provider)
-            self.aggregates_client = AggregatesClientXML(auth_provider)
-            self.services_client = ServicesClientXML(auth_provider)
+                self.auth_provider)
+            self.service_client = ServiceClientXML(self.auth_provider)
+            self.aggregates_client = AggregatesClientXML(self.auth_provider)
+            self.services_client = ServicesClientXML(self.auth_provider)
             self.tenant_usages_client = TenantUsagesClientXML(
-                auth_provider)
-            self.policy_client = PolicyClientXML(auth_provider)
-            self.hosts_client = HostsClientXML(auth_provider)
-            self.hypervisor_client = HypervisorClientXML(auth_provider)
-            self.network_client = NetworkClientXML(auth_provider)
+                self.auth_provider)
+            self.policy_client = PolicyClientXML(self.auth_provider)
+            self.hosts_client = HostsClientXML(self.auth_provider)
+            self.hypervisor_client = HypervisorClientXML(self.auth_provider)
+            self.network_client = NetworkClientXML(self.auth_provider)
             self.credentials_client = CredentialsClientXML(
-                auth_provider)
+                self.auth_provider)
             self.instance_usages_audit_log_client = \
-                InstanceUsagesAuditLogClientXML(auth_provider)
+                InstanceUsagesAuditLogClientXML(self.auth_provider)
             self.volume_hosts_client = VolumeHostsClientXML(
-                auth_provider)
+                self.auth_provider)
             self.volumes_extension_client = VolumeExtensionClientXML(
-                auth_provider)
+                self.auth_provider)
             if CONF.service_available.ceilometer:
                 self.telemetry_client = TelemetryClientXML(
-                    auth_provider)
+                    self.auth_provider)
             self.token_client = TokenClientXML()
             self.token_v3_client = V3TokenClientXML()
 
         elif self.interface == 'json':
             self.certificates_client = CertificatesClientJSON(
-                auth_provider)
+                self.auth_provider)
             self.certificates_v3_client = CertificatesV3ClientJSON(
-                auth_provider)
-            self.baremetal_client = BaremetalClientJSON(auth_provider)
-            self.servers_client = ServersClientJSON(auth_provider)
-            self.servers_v3_client = ServersV3ClientJSON(auth_provider)
-            self.limits_client = LimitsClientJSON(auth_provider)
-            self.images_client = ImagesClientJSON(auth_provider)
+                self.auth_provider)
+            self.baremetal_client = BaremetalClientJSON(self.auth_provider)
+            self.servers_client = ServersClientJSON(self.auth_provider)
+            self.servers_v3_client = ServersV3ClientJSON(self.auth_provider)
+            self.limits_client = LimitsClientJSON(self.auth_provider)
+            self.images_client = ImagesClientJSON(self.auth_provider)
             self.keypairs_v3_client = KeyPairsV3ClientJSON(
-                auth_provider)
-            self.keypairs_client = KeyPairsClientJSON(auth_provider)
+                self.auth_provider)
+            self.keypairs_client = KeyPairsClientJSON(self.auth_provider)
             self.keypairs_v3_client = KeyPairsV3ClientJSON(
-                auth_provider)
-            self.quotas_client = QuotasClientJSON(auth_provider)
-            self.quotas_v3_client = QuotasV3ClientJSON(auth_provider)
-            self.flavors_client = FlavorsClientJSON(auth_provider)
-            self.flavors_v3_client = FlavorsV3ClientJSON(auth_provider)
+                self.auth_provider)
+            self.quotas_client = QuotasClientJSON(self.auth_provider)
+            self.quotas_v3_client = QuotasV3ClientJSON(self.auth_provider)
+            self.flavors_client = FlavorsClientJSON(self.auth_provider)
+            self.flavors_v3_client = FlavorsV3ClientJSON(self.auth_provider)
             self.extensions_v3_client = ExtensionsV3ClientJSON(
-                auth_provider)
+                self.auth_provider)
             self.extensions_client = ExtensionsClientJSON(
-                auth_provider)
+                self.auth_provider)
             self.volumes_extensions_client = VolumesExtensionsClientJSON(
-                auth_provider)
+                self.auth_provider)
             self.floating_ips_client = FloatingIPsClientJSON(
-                auth_provider)
-            self.backups_client = BackupsClientJSON(auth_provider)
-            self.snapshots_client = SnapshotsClientJSON(auth_provider)
-            self.volumes_client = VolumesClientJSON(auth_provider)
-            self.volumes_v2_client = VolumesV2ClientJSON(auth_provider)
+                self.auth_provider)
+            self.backups_client = BackupsClientJSON(self.auth_provider)
+            self.snapshots_client = SnapshotsClientJSON(self.auth_provider)
+            self.volumes_client = VolumesClientJSON(self.auth_provider)
+            self.volumes_v2_client = VolumesV2ClientJSON(self.auth_provider)
             self.volume_types_client = VolumeTypesClientJSON(
-                auth_provider)
-            self.identity_client = IdentityClientJSON(auth_provider)
+                self.auth_provider)
+            self.identity_client = IdentityClientJSON(self.auth_provider)
             self.identity_v3_client = IdentityV3ClientJSON(
-                auth_provider)
+                self.auth_provider)
             self.security_groups_client = SecurityGroupsClientJSON(
-                auth_provider)
+                self.auth_provider)
             self.interfaces_v3_client = InterfacesV3ClientJSON(
-                auth_provider)
+                self.auth_provider)
             self.interfaces_client = InterfacesClientJSON(
-                auth_provider)
-            self.endpoints_client = EndPointClientJSON(auth_provider)
-            self.fixed_ips_client = FixedIPsClientJSON(auth_provider)
+                self.auth_provider)
+            self.endpoints_client = EndPointClientJSON(self.auth_provider)
+            self.fixed_ips_client = FixedIPsClientJSON(self.auth_provider)
             self.availability_zone_v3_client = AvailabilityZoneV3ClientJSON(
-                auth_provider)
+                self.auth_provider)
             self.availability_zone_client = AvailabilityZoneClientJSON(
-                auth_provider)
+                self.auth_provider)
             self.services_v3_client = ServicesV3ClientJSON(
-                auth_provider)
-            self.service_client = ServiceClientJSON(auth_provider)
+                self.auth_provider)
+            self.service_client = ServiceClientJSON(self.auth_provider)
             self.aggregates_v3_client = AggregatesV3ClientJSON(
-                auth_provider)
+                self.auth_provider)
             self.aggregates_client = AggregatesClientJSON(
-                auth_provider)
-            self.services_client = ServicesClientJSON(auth_provider)
+                self.auth_provider)
+            self.services_client = ServicesClientJSON(self.auth_provider)
             self.tenant_usages_client = TenantUsagesClientJSON(
-                auth_provider)
-            self.version_v3_client = VersionV3ClientJSON(auth_provider)
-            self.policy_client = PolicyClientJSON(auth_provider)
-            self.hosts_client = HostsClientJSON(auth_provider)
+                self.auth_provider)
+            self.version_v3_client = VersionV3ClientJSON(self.auth_provider)
+            self.policy_client = PolicyClientJSON(self.auth_provider)
+            self.hosts_client = HostsClientJSON(self.auth_provider)
             self.hypervisor_v3_client = HypervisorV3ClientJSON(
-                auth_provider)
+                self.auth_provider)
             self.hypervisor_client = HypervisorClientJSON(
-                auth_provider)
-            self.network_client = NetworkClientJSON(auth_provider)
+                self.auth_provider)
+            self.network_client = NetworkClientJSON(self.auth_provider)
             self.credentials_client = CredentialsClientJSON(
-                auth_provider)
+                self.auth_provider)
             self.instance_usages_audit_log_client = \
-                InstanceUsagesAuditLogClientJSON(auth_provider)
+                InstanceUsagesAuditLogClientJSON(self.auth_provider)
             self.volume_hosts_client = VolumeHostsClientJSON(
-                auth_provider)
+                self.auth_provider)
             self.volumes_extension_client = VolumeExtensionClientJSON(
-                auth_provider)
-            self.hosts_v3_client = HostsV3ClientJSON(auth_provider)
+                self.auth_provider)
+            self.hosts_v3_client = HostsV3ClientJSON(self.auth_provider)
             if CONF.service_available.ceilometer:
                 self.telemetry_client = TelemetryClientJSON(
-                    auth_provider)
+                    self.auth_provider)
             self.token_client = TokenClientJSON()
             self.token_v3_client = V3TokenClientJSON()
-            self.negative_client = NegativeRestClient(auth_provider)
+            self.negative_client = NegativeRestClient(self.auth_provider)
             self.negative_client.service = service
 
         else:
@@ -347,47 +349,22 @@
                            self.credentials.get('tenant_name'))
 
         # common clients
-        self.account_client = AccountClient(auth_provider)
+        self.account_client = AccountClient(self.auth_provider)
         if CONF.service_available.glance:
-            self.image_client = ImageClientJSON(auth_provider)
-            self.image_client_v2 = ImageClientV2JSON(auth_provider)
-        self.container_client = ContainerClient(auth_provider)
-        self.object_client = ObjectClient(auth_provider)
+            self.image_client = ImageClientJSON(self.auth_provider)
+            self.image_client_v2 = ImageClientV2JSON(self.auth_provider)
+        self.container_client = ContainerClient(self.auth_provider)
+        self.object_client = ObjectClient(self.auth_provider)
         self.orchestration_client = OrchestrationClient(
-            auth_provider)
+            self.auth_provider)
         self.ec2api_client = botoclients.APIClientEC2(*ec2_client_args)
         self.s3_client = botoclients.ObjectClientS3(*ec2_client_args)
         self.custom_object_client = ObjectClientCustomizedHeader(
-            auth_provider)
+            self.auth_provider)
         self.custom_account_client = \
-            AccountClientCustomizedHeader(auth_provider)
+            AccountClientCustomizedHeader(self.auth_provider)
         self.data_processing_client = DataProcessingClient(
-            auth_provider)
-
-    @classmethod
-    def get_auth_provider_class(cls, auth_version):
-        if auth_version == 'v2':
-            return auth.KeystoneV2AuthProvider
-        else:
-            return auth.KeystoneV3AuthProvider
-
-    def get_default_credentials(self):
-        return dict(
-            username=CONF.identity.username,
-            password=CONF.identity.password,
-            tenant_name=CONF.identity.tenant_name
-        )
-
-    def get_auth_provider(self, credentials=None):
-        auth_params = dict(client_type='tempest',
-                           interface=self.interface)
-        auth_provider_class = self.get_auth_provider_class(self.auth_version)
-        # If invalid / incomplete credentials are provided, use default ones
-        if credentials is None or \
-                not auth_provider_class.check_credentials(credentials):
-            credentials = self.credentials
-        auth_params['credentials'] = credentials
-        return auth_provider_class(**auth_params)
+            self.auth_provider)
 
 
 class AltManager(Manager):
@@ -452,3 +429,187 @@
                       CONF.identity.tenant_name,
                       interface=interface,
                       service=service)
+
+
+class OfficialClientManager(manager.Manager):
+    """
+    Manager that provides access to the official python clients for
+    calling various OpenStack APIs.
+    """
+
+    NOVACLIENT_VERSION = '2'
+    CINDERCLIENT_VERSION = '1'
+    HEATCLIENT_VERSION = '1'
+
+    def __init__(self, username, password, tenant_name):
+        # FIXME(andreaf) Auth provider for client_type 'official' is
+        # not implemented yet, setting to 'tempest' for now.
+        self.client_type = 'tempest'
+        self.interface = None
+        # super cares for credentials validation
+        super(OfficialClientManager, self).__init__(
+            username=username, password=password, tenant_name=tenant_name)
+        self.compute_client = self._get_compute_client(username,
+                                                       password,
+                                                       tenant_name)
+        self.identity_client = self._get_identity_client(username,
+                                                         password,
+                                                         tenant_name)
+        self.image_client = self._get_image_client()
+        self.network_client = self._get_network_client()
+        self.volume_client = self._get_volume_client(username,
+                                                     password,
+                                                     tenant_name)
+        self.object_storage_client = self._get_object_storage_client(
+            username,
+            password,
+            tenant_name)
+        self.orchestration_client = self._get_orchestration_client(
+            username,
+            password,
+            tenant_name)
+
+    def _get_compute_client(self, username, password, tenant_name):
+        # Novaclient will not execute operations for anyone but the
+        # identified user, so a new client needs to be created for
+        # each user that operations need to be performed for.
+        self._validate_credentials(username, password, tenant_name)
+
+        auth_url = CONF.identity.uri
+        dscv = CONF.identity.disable_ssl_certificate_validation
+        region = CONF.identity.region
+
+        client_args = (username, password, tenant_name, auth_url)
+
+        # Create our default Nova client to use in testing
+        service_type = CONF.compute.catalog_type
+        endpoint_type = CONF.compute.endpoint_type
+        return novaclient.client.Client(self.NOVACLIENT_VERSION,
+                                        *client_args,
+                                        service_type=service_type,
+                                        endpoint_type=endpoint_type,
+                                        region_name=region,
+                                        no_cache=True,
+                                        insecure=dscv,
+                                        http_log_debug=True)
+
+    def _get_image_client(self):
+        token = self.identity_client.auth_token
+        region = CONF.identity.region
+        endpoint_type = CONF.image.endpoint_type
+        endpoint = self.identity_client.service_catalog.url_for(
+            attr='region', filter_value=region,
+            service_type=CONF.image.catalog_type, endpoint_type=endpoint_type)
+        dscv = CONF.identity.disable_ssl_certificate_validation
+        return glanceclient.Client('1', endpoint=endpoint, token=token,
+                                   insecure=dscv)
+
+    def _get_volume_client(self, username, password, tenant_name):
+        auth_url = CONF.identity.uri
+        region = CONF.identity.region
+        endpoint_type = CONF.volume.endpoint_type
+        return cinderclient.client.Client(self.CINDERCLIENT_VERSION,
+                                          username,
+                                          password,
+                                          tenant_name,
+                                          auth_url,
+                                          region_name=region,
+                                          endpoint_type=endpoint_type,
+                                          http_log_debug=True)
+
+    def _get_object_storage_client(self, username, password, tenant_name):
+        auth_url = CONF.identity.uri
+        # add current tenant to swift operator role group.
+        keystone_admin = self._get_identity_client(
+            CONF.identity.admin_username,
+            CONF.identity.admin_password,
+            CONF.identity.admin_tenant_name)
+
+        # enable test user to operate swift by adding operator role to him.
+        roles = keystone_admin.roles.list()
+        operator_role = CONF.object_storage.operator_role
+        member_role = [role for role in roles if role.name == operator_role][0]
+        # NOTE(maurosr): This is surrounded in the try-except block cause
+        # neutron tests doesn't have tenant isolation.
+        try:
+            keystone_admin.roles.add_user_role(self.identity_client.user_id,
+                                               member_role.id,
+                                               self.identity_client.tenant_id)
+        except keystoneclient.exceptions.Conflict:
+            pass
+
+        endpoint_type = CONF.object_storage.endpoint_type
+        os_options = {'endpoint_type': endpoint_type}
+        return swiftclient.Connection(auth_url, username, password,
+                                      tenant_name=tenant_name,
+                                      auth_version='2',
+                                      os_options=os_options)
+
+    def _get_orchestration_client(self, username=None, password=None,
+                                  tenant_name=None):
+        if not username:
+            username = CONF.identity.admin_username
+        if not password:
+            password = CONF.identity.admin_password
+        if not tenant_name:
+            tenant_name = CONF.identity.tenant_name
+
+        self._validate_credentials(username, password, tenant_name)
+
+        keystone = self._get_identity_client(username, password, tenant_name)
+        region = CONF.identity.region
+        endpoint_type = CONF.orchestration.endpoint_type
+        token = keystone.auth_token
+        service_type = CONF.orchestration.catalog_type
+        try:
+            endpoint = keystone.service_catalog.url_for(
+                attr='region',
+                filter_value=region,
+                service_type=service_type,
+                endpoint_type=endpoint_type)
+        except keystoneclient.exceptions.EndpointNotFound:
+            return None
+        else:
+            return heatclient.client.Client(self.HEATCLIENT_VERSION,
+                                            endpoint,
+                                            token=token,
+                                            username=username,
+                                            password=password)
+
+    def _get_identity_client(self, username, password, tenant_name):
+        # This identity client is not intended to check the security
+        # of the identity service, so use admin credentials by default.
+        self._validate_credentials(username, password, tenant_name)
+
+        auth_url = CONF.identity.uri
+        dscv = CONF.identity.disable_ssl_certificate_validation
+
+        return keystoneclient.v2_0.client.Client(username=username,
+                                                 password=password,
+                                                 tenant_name=tenant_name,
+                                                 auth_url=auth_url,
+                                                 insecure=dscv)
+
+    def _get_network_client(self):
+        # The intended configuration is for the network client to have
+        # admin privileges and indicate for whom resources are being
+        # created via a 'tenant_id' parameter.  This will often be
+        # preferable to authenticating as a specific user because
+        # working with certain resources (public routers and networks)
+        # often requires admin privileges anyway.
+        username = CONF.identity.admin_username
+        password = CONF.identity.admin_password
+        tenant_name = CONF.identity.admin_tenant_name
+
+        self._validate_credentials(username, password, tenant_name)
+
+        auth_url = CONF.identity.uri
+        dscv = CONF.identity.disable_ssl_certificate_validation
+        endpoint_type = CONF.network.endpoint_type
+
+        return neutronclient.v2_0.client.Client(username=username,
+                                                password=password,
+                                                tenant_name=tenant_name,
+                                                endpoint_type=endpoint_type,
+                                                auth_url=auth_url,
+                                                insecure=dscv)
diff --git a/tempest/common/rest_client.py b/tempest/common/rest_client.py
index 5064f07..03dccd4 100644
--- a/tempest/common/rest_client.py
+++ b/tempest/common/rest_client.py
@@ -502,24 +502,6 @@
         raise NotImplementedError(message)
 
 
-class RestClientXML(RestClient):
-
-    # NOTE(vponomaryov): This is deprecated class
-    # and should be removed after excluding it
-    # from all service clients
-
-    TYPE = "xml"
-
-    def _parse_resp(self, body):
-        return xml_to_json(etree.fromstring(body))
-
-    def is_absolute_limit(self, resp, resp_body):
-        if (not isinstance(resp_body, collections.Mapping) or
-                'retry-after' not in resp):
-            return True
-        return 'exceed' in resp_body.get('message', 'blabla')
-
-
 class NegativeRestClient(RestClient):
     """
     Version of RestClient that does not raise exceptions.
diff --git a/tempest/common/utils/test_utils.py b/tempest/common/utils/test_utils.py
index 2e23782..cc0d831 100644
--- a/tempest/common/utils/test_utils.py
+++ b/tempest/common/utils/test_utils.py
@@ -12,9 +12,9 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
+from tempest import clients
 from tempest.common.utils import misc
 from tempest import config
-from tempest.scenario import manager
 
 import json
 import re
@@ -35,7 +35,7 @@
         self.non_ssh_image_pattern = \
             CONF.input_scenario.non_ssh_image_regex
         # Setup clients
-        ocm = manager.OfficialClientManager(CONF.identity.username,
+        ocm = clients.OfficialClientManager(CONF.identity.username,
                                             CONF.identity.password,
                                             CONF.identity.tenant_name)
         self.client = ocm.compute_client
@@ -95,7 +95,7 @@
                                             digit=string.digits)
 
     def __init__(self):
-        ocm = manager.OfficialClientManager(CONF.identity.username,
+        ocm = clients.OfficialClientManager(CONF.identity.username,
                                             CONF.identity.password,
                                             CONF.identity.tenant_name)
         self.client = ocm.compute_client
diff --git a/tempest/config.py b/tempest/config.py
index a2d35a9..c92a04d 100644
--- a/tempest/config.py
+++ b/tempest/config.py
@@ -343,6 +343,9 @@
     cfg.IntOpt('tenant_network_mask_bits',
                default=28,
                help="The mask bits for tenant ipv4 subnets"),
+    cfg.BoolOpt('ipv6_enabled',
+                default=True,
+                help="Allow the execution of IPv6 tests"),
     cfg.StrOpt('tenant_network_v6_cidr',
                default="2003::/64",
                help="The cidr block to allocate tenant ipv6 subnets from"),
diff --git a/tempest/manager.py b/tempest/manager.py
index 93ff10f..708447e 100644
--- a/tempest/manager.py
+++ b/tempest/manager.py
@@ -13,8 +13,12 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
+from tempest import auth
+from tempest import config
 from tempest import exceptions
 
+CONF = config.CONF
+
 
 class Manager(object):
 
@@ -25,7 +29,27 @@
     and a client object for a test case to use in performing actions.
     """
 
-    def __init__(self):
+    def __init__(self, username=None, password=None, tenant_name=None):
+        """
+        We allow overriding of the credentials used within the various
+        client classes managed by the Manager object. Left as None, the
+        standard username/password/tenant_name[/domain_name] is used.
+
+        :param credentials: Override of the credentials
+        """
+        self.auth_version = CONF.identity.auth_version
+        # FIXME(andreaf) Change Manager __init__ to accept a credentials dict
+        if username is None or password is None:
+            # Tenant None is a valid use case
+            self.credentials = self.get_default_credentials()
+        else:
+            self.credentials = dict(username=username, password=password,
+                                    tenant_name=tenant_name)
+        if self.auth_version == 'v3':
+            self.credentials['domain_name'] = 'Default'
+        # Creates an auth provider for the credentials
+        self.auth_provider = self.get_auth_provider(self.credentials)
+        # FIXME(andreaf) unused
         self.client_attr_names = []
 
     # we do this everywhere, have it be part of the super class
@@ -36,3 +60,28 @@
                    "tenant_name: %(t)s" %
                    {'u': username, 'p': password, 't': tenant_name})
             raise exceptions.InvalidConfiguration(msg)
+
+    @classmethod
+    def get_auth_provider_class(cls, auth_version):
+        if auth_version == 'v2':
+            return auth.KeystoneV2AuthProvider
+        else:
+            return auth.KeystoneV3AuthProvider
+
+    def get_default_credentials(self):
+        return dict(
+            username=CONF.identity.username,
+            password=CONF.identity.password,
+            tenant_name=CONF.identity.tenant_name
+        )
+
+    def get_auth_provider(self, credentials=None):
+        auth_params = dict(client_type=getattr(self, 'client_type', None),
+                           interface=getattr(self, 'interface', None))
+        auth_provider_class = self.get_auth_provider_class(self.auth_version)
+        # If invalid / incomplete credentials are provided, use default ones
+        if credentials is None or \
+                not auth_provider_class.check_credentials(credentials):
+            credentials = self.credentials
+        auth_params['credentials'] = credentials
+        return auth_provider_class(**auth_params)
diff --git a/tempest/scenario/manager.py b/tempest/scenario/manager.py
index 02a3c9d..b4fb6ab 100644
--- a/tempest/scenario/manager.py
+++ b/tempest/scenario/manager.py
@@ -18,26 +18,17 @@
 import os
 import subprocess
 
-# Default client libs
-import cinderclient.client
-import glanceclient
-import heatclient.client
-import keystoneclient.exceptions
-import keystoneclient.v2_0.client
 import netaddr
 from neutronclient.common import exceptions as exc
-import neutronclient.v2_0.client
-import novaclient.client
 from novaclient import exceptions as nova_exceptions
-import swiftclient
 
 from tempest.api.network import common as net_common
+from tempest import clients
 from tempest.common import isolated_creds
 from tempest.common.utils import data_utils
 from tempest.common.utils.linux.remote_client import RemoteClient
 from tempest import config
 from tempest import exceptions
-import tempest.manager
 from tempest.openstack.common import log
 import tempest.test
 
@@ -53,184 +44,6 @@
 LOG_cinder_client.addHandler(log.NullHandler())
 
 
-class OfficialClientManager(tempest.manager.Manager):
-    """
-    Manager that provides access to the official python clients for
-    calling various OpenStack APIs.
-    """
-
-    NOVACLIENT_VERSION = '2'
-    CINDERCLIENT_VERSION = '1'
-    HEATCLIENT_VERSION = '1'
-
-    def __init__(self, username, password, tenant_name):
-        super(OfficialClientManager, self).__init__()
-        self.compute_client = self._get_compute_client(username,
-                                                       password,
-                                                       tenant_name)
-        self.identity_client = self._get_identity_client(username,
-                                                         password,
-                                                         tenant_name)
-        self.image_client = self._get_image_client()
-        self.network_client = self._get_network_client()
-        self.volume_client = self._get_volume_client(username,
-                                                     password,
-                                                     tenant_name)
-        self.object_storage_client = self._get_object_storage_client(
-            username,
-            password,
-            tenant_name)
-        self.orchestration_client = self._get_orchestration_client(
-            username,
-            password,
-            tenant_name)
-
-    def _get_compute_client(self, username, password, tenant_name):
-        # Novaclient will not execute operations for anyone but the
-        # identified user, so a new client needs to be created for
-        # each user that operations need to be performed for.
-        self._validate_credentials(username, password, tenant_name)
-
-        auth_url = CONF.identity.uri
-        dscv = CONF.identity.disable_ssl_certificate_validation
-        region = CONF.identity.region
-
-        client_args = (username, password, tenant_name, auth_url)
-
-        # Create our default Nova client to use in testing
-        service_type = CONF.compute.catalog_type
-        endpoint_type = CONF.compute.endpoint_type
-        return novaclient.client.Client(self.NOVACLIENT_VERSION,
-                                        *client_args,
-                                        service_type=service_type,
-                                        endpoint_type=endpoint_type,
-                                        region_name=region,
-                                        no_cache=True,
-                                        insecure=dscv,
-                                        http_log_debug=True)
-
-    def _get_image_client(self):
-        token = self.identity_client.auth_token
-        region = CONF.identity.region
-        endpoint_type = CONF.image.endpoint_type
-        endpoint = self.identity_client.service_catalog.url_for(
-            attr='region', filter_value=region,
-            service_type=CONF.image.catalog_type, endpoint_type=endpoint_type)
-        dscv = CONF.identity.disable_ssl_certificate_validation
-        return glanceclient.Client('1', endpoint=endpoint, token=token,
-                                   insecure=dscv)
-
-    def _get_volume_client(self, username, password, tenant_name):
-        auth_url = CONF.identity.uri
-        region = CONF.identity.region
-        endpoint_type = CONF.volume.endpoint_type
-        return cinderclient.client.Client(self.CINDERCLIENT_VERSION,
-                                          username,
-                                          password,
-                                          tenant_name,
-                                          auth_url,
-                                          region_name=region,
-                                          endpoint_type=endpoint_type,
-                                          http_log_debug=True)
-
-    def _get_object_storage_client(self, username, password, tenant_name):
-        auth_url = CONF.identity.uri
-        # add current tenant to swift operator role group.
-        keystone_admin = self._get_identity_client(
-            CONF.identity.admin_username,
-            CONF.identity.admin_password,
-            CONF.identity.admin_tenant_name)
-
-        # enable test user to operate swift by adding operator role to him.
-        roles = keystone_admin.roles.list()
-        operator_role = CONF.object_storage.operator_role
-        member_role = [role for role in roles if role.name == operator_role][0]
-        # NOTE(maurosr): This is surrounded in the try-except block cause
-        # neutron tests doesn't have tenant isolation.
-        try:
-            keystone_admin.roles.add_user_role(self.identity_client.user_id,
-                                               member_role.id,
-                                               self.identity_client.tenant_id)
-        except keystoneclient.exceptions.Conflict:
-            pass
-
-        endpoint_type = CONF.object_storage.endpoint_type
-        os_options = {'endpoint_type': endpoint_type}
-        return swiftclient.Connection(auth_url, username, password,
-                                      tenant_name=tenant_name,
-                                      auth_version='2',
-                                      os_options=os_options)
-
-    def _get_orchestration_client(self, username=None, password=None,
-                                  tenant_name=None):
-        if not username:
-            username = CONF.identity.admin_username
-        if not password:
-            password = CONF.identity.admin_password
-        if not tenant_name:
-            tenant_name = CONF.identity.tenant_name
-
-        self._validate_credentials(username, password, tenant_name)
-
-        keystone = self._get_identity_client(username, password, tenant_name)
-        region = CONF.identity.region
-        endpoint_type = CONF.orchestration.endpoint_type
-        token = keystone.auth_token
-        service_type = CONF.orchestration.catalog_type
-        try:
-            endpoint = keystone.service_catalog.url_for(
-                attr='region',
-                filter_value=region,
-                service_type=service_type,
-                endpoint_type=endpoint_type)
-        except keystoneclient.exceptions.EndpointNotFound:
-            return None
-        else:
-            return heatclient.client.Client(self.HEATCLIENT_VERSION,
-                                            endpoint,
-                                            token=token,
-                                            username=username,
-                                            password=password)
-
-    def _get_identity_client(self, username, password, tenant_name):
-        # This identity client is not intended to check the security
-        # of the identity service, so use admin credentials by default.
-        self._validate_credentials(username, password, tenant_name)
-
-        auth_url = CONF.identity.uri
-        dscv = CONF.identity.disable_ssl_certificate_validation
-
-        return keystoneclient.v2_0.client.Client(username=username,
-                                                 password=password,
-                                                 tenant_name=tenant_name,
-                                                 auth_url=auth_url,
-                                                 insecure=dscv)
-
-    def _get_network_client(self):
-        # The intended configuration is for the network client to have
-        # admin privileges and indicate for whom resources are being
-        # created via a 'tenant_id' parameter.  This will often be
-        # preferable to authenticating as a specific user because
-        # working with certain resources (public routers and networks)
-        # often requires admin privileges anyway.
-        username = CONF.identity.admin_username
-        password = CONF.identity.admin_password
-        tenant_name = CONF.identity.admin_tenant_name
-
-        self._validate_credentials(username, password, tenant_name)
-
-        auth_url = CONF.identity.uri
-        dscv = CONF.identity.disable_ssl_certificate_validation
-        endpoint_type = CONF.network.endpoint_type
-
-        return neutronclient.v2_0.client.Client(username=username,
-                                                password=password,
-                                                tenant_name=tenant_name,
-                                                endpoint_type=endpoint_type,
-                                                auth_url=auth_url,
-                                                insecure=dscv)
-
-
 class OfficialClientTest(tempest.test.BaseTestCase):
     """
     Official Client test base class for scenario testing.
@@ -253,7 +66,8 @@
 
         username, password, tenant_name = cls.credentials()
 
-        cls.manager = OfficialClientManager(username, password, tenant_name)
+        cls.manager = clients.OfficialClientManager(
+            username, password, tenant_name)
         cls.compute_client = cls.manager.compute_client
         cls.image_client = cls.manager.image_client
         cls.identity_client = cls.manager.identity_client
@@ -681,18 +495,32 @@
         Create a subnet for the given network within the cidr block
         configured for tenant networks.
         """
+
+        def cidr_in_use(cidr, tenant_id):
+            """
+            :return True if subnet with cidr already exist in tenant
+                False else
+            """
+            cidr_in_use = self._list_subnets(tenant_id=tenant_id, cidr=cidr)
+            return len(cidr_in_use) != 0
+
         tenant_cidr = netaddr.IPNetwork(CONF.network.tenant_network_cidr)
         result = None
         # Repeatedly attempt subnet creation with sequential cidr
         # blocks until an unallocated block is found.
         for subnet_cidr in tenant_cidr.subnet(
             CONF.network.tenant_network_mask_bits):
+            str_cidr = str(subnet_cidr)
+            if cidr_in_use(str_cidr, tenant_id=network.tenant_id):
+                continue
+
             body = dict(
                 subnet=dict(
+                    name=data_utils.rand_name(namestart),
                     ip_version=4,
                     network_id=network.id,
                     tenant_id=network.tenant_id,
-                    cidr=str(subnet_cidr),
+                    cidr=str_cidr,
                 ),
             )
             try:
@@ -705,7 +533,7 @@
         self.assertIsNotNone(result, 'Unable to allocate tenant network')
         subnet = net_common.DeletableSubnet(client=self.network_client,
                                             **result['subnet'])
-        self.assertEqual(subnet.cidr, str(subnet_cidr))
+        self.assertEqual(subnet.cidr, str_cidr)
         self.set_resource(data_utils.rand_name(namestart), subnet)
         return subnet
 
diff --git a/tempest/scenario/test_security_groups_basic_ops.py b/tempest/scenario/test_security_groups_basic_ops.py
index 4b26b41..1ddba9e 100644
--- a/tempest/scenario/test_security_groups_basic_ops.py
+++ b/tempest/scenario/test_security_groups_basic_ops.py
@@ -13,13 +13,13 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
+from tempest import clients
 from tempest.common import debug
 from tempest.common.utils import data_utils
 from tempest import config
 from tempest import exceptions
 from tempest.openstack.common import log as logging
 from tempest.scenario import manager
-from tempest.scenario.manager import OfficialClientManager
 from tempest.test import attr
 from tempest.test import call_until_true
 from tempest.test import services
@@ -102,7 +102,7 @@
         """
 
         def __init__(self, tenant_id, tenant_user, tenant_pass, tenant_name):
-            self.manager = OfficialClientManager(
+            self.manager = clients.OfficialClientManager(
                 tenant_user,
                 tenant_pass,
                 tenant_name
diff --git a/tempest/services/botoclients.py b/tempest/services/botoclients.py
index 03e87b1..b52d48c 100644
--- a/tempest/services/botoclients.py
+++ b/tempest/services/botoclients.py
@@ -35,6 +35,7 @@
     def __init__(self, username=None, password=None,
                  auth_url=None, tenant_name=None,
                  *args, **kwargs):
+        # FIXME(andreaf) replace credentials and auth_url with auth_provider
 
         self.connection_timeout = str(CONF.boto.http_socket_timeout)
         self.num_retries = str(CONF.boto.num_retries)
@@ -45,6 +46,7 @@
                         "tenant_name": tenant_name}
 
     def _keystone_aws_get(self):
+        # FIXME(andreaf) Move EC2 credentials to AuthProvider
         import keystoneclient.v2_0.client
 
         keystone = keystoneclient.v2_0.client.Client(**self.ks_cred)
diff --git a/tempest/services/compute/xml/aggregates_client.py b/tempest/services/compute/xml/aggregates_client.py
index cf853ba..5b250ee 100644
--- a/tempest/services/compute/xml/aggregates_client.py
+++ b/tempest/services/compute/xml/aggregates_client.py
@@ -15,7 +15,7 @@
 
 from lxml import etree
 
-from tempest.common.rest_client import RestClientXML
+from tempest.common import rest_client
 from tempest import config
 from tempest import exceptions
 from tempest.services.compute.xml.common import Document
@@ -26,7 +26,8 @@
 CONF = config.CONF
 
 
-class AggregatesClientXML(RestClientXML):
+class AggregatesClientXML(rest_client.RestClient):
+    TYPE = "xml"
 
     def __init__(self, auth_provider):
         super(AggregatesClientXML, self).__init__(auth_provider)
diff --git a/tempest/services/compute/xml/availability_zone_client.py b/tempest/services/compute/xml/availability_zone_client.py
index 3d8ac8a..4d71186 100644
--- a/tempest/services/compute/xml/availability_zone_client.py
+++ b/tempest/services/compute/xml/availability_zone_client.py
@@ -15,14 +15,15 @@
 
 from lxml import etree
 
-from tempest.common.rest_client import RestClientXML
+from tempest.common import rest_client
 from tempest import config
 from tempest.services.compute.xml.common import xml_to_json
 
 CONF = config.CONF
 
 
-class AvailabilityZoneClientXML(RestClientXML):
+class AvailabilityZoneClientXML(rest_client.RestClient):
+    TYPE = "xml"
 
     def __init__(self, auth_provider):
         super(AvailabilityZoneClientXML, self).__init__(
diff --git a/tempest/services/compute/xml/certificates_client.py b/tempest/services/compute/xml/certificates_client.py
index 4ee10c4..24ffca8 100644
--- a/tempest/services/compute/xml/certificates_client.py
+++ b/tempest/services/compute/xml/certificates_client.py
@@ -14,13 +14,14 @@
 #    under the License.
 
 
-from tempest.common.rest_client import RestClientXML
+from tempest.common import rest_client
 from tempest import config
 
 CONF = config.CONF
 
 
-class CertificatesClientXML(RestClientXML):
+class CertificatesClientXML(rest_client.RestClient):
+    TYPE = "xml"
 
     def __init__(self, auth_provider):
         super(CertificatesClientXML, self).__init__(auth_provider)
diff --git a/tempest/services/compute/xml/extensions_client.py b/tempest/services/compute/xml/extensions_client.py
index f97b64d..3e8254c 100644
--- a/tempest/services/compute/xml/extensions_client.py
+++ b/tempest/services/compute/xml/extensions_client.py
@@ -15,14 +15,15 @@
 
 from lxml import etree
 
-from tempest.common.rest_client import RestClientXML
+from tempest.common import rest_client
 from tempest import config
 from tempest.services.compute.xml.common import xml_to_json
 
 CONF = config.CONF
 
 
-class ExtensionsClientXML(RestClientXML):
+class ExtensionsClientXML(rest_client.RestClient):
+    TYPE = "xml"
 
     def __init__(self, auth_provider):
         super(ExtensionsClientXML, self).__init__(auth_provider)
diff --git a/tempest/services/compute/xml/fixed_ips_client.py b/tempest/services/compute/xml/fixed_ips_client.py
index b89e096..0475530 100644
--- a/tempest/services/compute/xml/fixed_ips_client.py
+++ b/tempest/services/compute/xml/fixed_ips_client.py
@@ -14,7 +14,7 @@
 #    under the License.
 
 
-from tempest.common.rest_client import RestClientXML
+from tempest.common import rest_client
 from tempest import config
 from tempest.services.compute.xml.common import Document
 from tempest.services.compute.xml.common import Element
@@ -23,7 +23,8 @@
 CONF = config.CONF
 
 
-class FixedIPsClientXML(RestClientXML):
+class FixedIPsClientXML(rest_client.RestClient):
+    TYPE = "xml"
 
     def __init__(self, auth_provider):
         super(FixedIPsClientXML, self).__init__(auth_provider)
diff --git a/tempest/services/compute/xml/flavors_client.py b/tempest/services/compute/xml/flavors_client.py
index 554b253..68a27c9 100644
--- a/tempest/services/compute/xml/flavors_client.py
+++ b/tempest/services/compute/xml/flavors_client.py
@@ -17,7 +17,7 @@
 
 from lxml import etree
 
-from tempest.common.rest_client import RestClientXML
+from tempest.common import rest_client
 from tempest import config
 from tempest.services.compute.xml.common import Document
 from tempest.services.compute.xml.common import Element
@@ -33,7 +33,8 @@
     "http://docs.openstack.org/compute/ext/flavor_access/api/v2"
 
 
-class FlavorsClientXML(RestClientXML):
+class FlavorsClientXML(rest_client.RestClient):
+    TYPE = "xml"
 
     def __init__(self, auth_provider):
         super(FlavorsClientXML, self).__init__(auth_provider)
diff --git a/tempest/services/compute/xml/floating_ips_client.py b/tempest/services/compute/xml/floating_ips_client.py
index d6decf3..be54753 100644
--- a/tempest/services/compute/xml/floating_ips_client.py
+++ b/tempest/services/compute/xml/floating_ips_client.py
@@ -16,7 +16,7 @@
 from lxml import etree
 import urllib
 
-from tempest.common.rest_client import RestClientXML
+from tempest.common import rest_client
 from tempest import config
 from tempest import exceptions
 from tempest.services.compute.xml.common import Document
@@ -27,7 +27,9 @@
 CONF = config.CONF
 
 
-class FloatingIPsClientXML(RestClientXML):
+class FloatingIPsClientXML(rest_client.RestClient):
+    TYPE = "xml"
+
     def __init__(self, auth_provider):
         super(FloatingIPsClientXML, self).__init__(auth_provider)
         self.service = CONF.compute.catalog_type
diff --git a/tempest/services/compute/xml/hosts_client.py b/tempest/services/compute/xml/hosts_client.py
index 13abe18..b74cd04 100644
--- a/tempest/services/compute/xml/hosts_client.py
+++ b/tempest/services/compute/xml/hosts_client.py
@@ -15,7 +15,7 @@
 import urllib
 
 from lxml import etree
-from tempest.common.rest_client import RestClientXML
+from tempest.common import rest_client
 from tempest import config
 from tempest.services.compute.xml.common import Document
 from tempest.services.compute.xml.common import Element
@@ -24,7 +24,8 @@
 CONF = config.CONF
 
 
-class HostsClientXML(RestClientXML):
+class HostsClientXML(rest_client.RestClient):
+    TYPE = "xml"
 
     def __init__(self, auth_provider):
         super(HostsClientXML, self).__init__(auth_provider)
diff --git a/tempest/services/compute/xml/hypervisor_client.py b/tempest/services/compute/xml/hypervisor_client.py
index 3c1ef08..ecd7541 100644
--- a/tempest/services/compute/xml/hypervisor_client.py
+++ b/tempest/services/compute/xml/hypervisor_client.py
@@ -15,14 +15,15 @@
 
 from lxml import etree
 
-from tempest.common.rest_client import RestClientXML
+from tempest.common import rest_client
 from tempest import config
 from tempest.services.compute.xml.common import xml_to_json
 
 CONF = config.CONF
 
 
-class HypervisorClientXML(RestClientXML):
+class HypervisorClientXML(rest_client.RestClient):
+    TYPE = "xml"
 
     def __init__(self, auth_provider):
         super(HypervisorClientXML, self).__init__(auth_provider)
diff --git a/tempest/services/compute/xml/images_client.py b/tempest/services/compute/xml/images_client.py
index 9f80c55..9d529be 100644
--- a/tempest/services/compute/xml/images_client.py
+++ b/tempest/services/compute/xml/images_client.py
@@ -17,7 +17,7 @@
 
 from lxml import etree
 
-from tempest.common.rest_client import RestClientXML
+from tempest.common import rest_client
 from tempest.common import waiters
 from tempest import config
 from tempest import exceptions
@@ -30,7 +30,8 @@
 CONF = config.CONF
 
 
-class ImagesClientXML(RestClientXML):
+class ImagesClientXML(rest_client.RestClient):
+    TYPE = "xml"
 
     def __init__(self, auth_provider):
         super(ImagesClientXML, self).__init__(auth_provider)
diff --git a/tempest/services/compute/xml/instance_usage_audit_log_client.py b/tempest/services/compute/xml/instance_usage_audit_log_client.py
index baa6966..1cd8c07 100644
--- a/tempest/services/compute/xml/instance_usage_audit_log_client.py
+++ b/tempest/services/compute/xml/instance_usage_audit_log_client.py
@@ -15,14 +15,15 @@
 
 from lxml import etree
 
-from tempest.common.rest_client import RestClientXML
+from tempest.common import rest_client
 from tempest import config
 from tempest.services.compute.xml.common import xml_to_json
 
 CONF = config.CONF
 
 
-class InstanceUsagesAuditLogClientXML(RestClientXML):
+class InstanceUsagesAuditLogClientXML(rest_client.RestClient):
+    TYPE = "xml"
 
     def __init__(self, auth_provider):
         super(InstanceUsagesAuditLogClientXML, self).__init__(
diff --git a/tempest/services/compute/xml/interfaces_client.py b/tempest/services/compute/xml/interfaces_client.py
index 6155cd6..5df6187 100644
--- a/tempest/services/compute/xml/interfaces_client.py
+++ b/tempest/services/compute/xml/interfaces_client.py
@@ -17,7 +17,7 @@
 
 from lxml import etree
 
-from tempest.common.rest_client import RestClientXML
+from tempest.common import rest_client
 from tempest import config
 from tempest import exceptions
 from tempest.services.compute.xml.common import Document
@@ -28,7 +28,8 @@
 CONF = config.CONF
 
 
-class InterfacesClientXML(RestClientXML):
+class InterfacesClientXML(rest_client.RestClient):
+    TYPE = "xml"
 
     def __init__(self, auth_provider):
         super(InterfacesClientXML, self).__init__(auth_provider)
diff --git a/tempest/services/compute/xml/keypairs_client.py b/tempest/services/compute/xml/keypairs_client.py
index 5641251..fb498c0 100644
--- a/tempest/services/compute/xml/keypairs_client.py
+++ b/tempest/services/compute/xml/keypairs_client.py
@@ -16,7 +16,7 @@
 
 from lxml import etree
 
-from tempest.common.rest_client import RestClientXML
+from tempest.common import rest_client
 from tempest import config
 from tempest.services.compute.xml.common import Document
 from tempest.services.compute.xml.common import Element
@@ -26,7 +26,8 @@
 CONF = config.CONF
 
 
-class KeyPairsClientXML(RestClientXML):
+class KeyPairsClientXML(rest_client.RestClient):
+    TYPE = "xml"
 
     def __init__(self, auth_provider):
         super(KeyPairsClientXML, self).__init__(auth_provider)
diff --git a/tempest/services/compute/xml/limits_client.py b/tempest/services/compute/xml/limits_client.py
index 61c434c..2327626 100644
--- a/tempest/services/compute/xml/limits_client.py
+++ b/tempest/services/compute/xml/limits_client.py
@@ -15,7 +15,7 @@
 
 from lxml import objectify
 
-from tempest.common.rest_client import RestClientXML
+from tempest.common import rest_client
 from tempest import config
 
 CONF = config.CONF
@@ -23,7 +23,8 @@
 NS = "{http://docs.openstack.org/common/api/v1.0}"
 
 
-class LimitsClientXML(RestClientXML):
+class LimitsClientXML(rest_client.RestClient):
+    TYPE = "xml"
 
     def __init__(self, auth_provider):
         super(LimitsClientXML, self).__init__(auth_provider)
diff --git a/tempest/services/compute/xml/quotas_client.py b/tempest/services/compute/xml/quotas_client.py
index 00c3275..eb287c2 100644
--- a/tempest/services/compute/xml/quotas_client.py
+++ b/tempest/services/compute/xml/quotas_client.py
@@ -15,7 +15,7 @@
 
 from lxml import etree
 
-from tempest.common.rest_client import RestClientXML
+from tempest.common import rest_client
 from tempest import config
 from tempest.services.compute.xml.common import Document
 from tempest.services.compute.xml.common import Element
@@ -25,7 +25,8 @@
 CONF = config.CONF
 
 
-class QuotasClientXML(RestClientXML):
+class QuotasClientXML(rest_client.RestClient):
+    TYPE = "xml"
 
     def __init__(self, auth_provider):
         super(QuotasClientXML, self).__init__(auth_provider)
diff --git a/tempest/services/compute/xml/security_groups_client.py b/tempest/services/compute/xml/security_groups_client.py
index 947f6da..d53e8da 100644
--- a/tempest/services/compute/xml/security_groups_client.py
+++ b/tempest/services/compute/xml/security_groups_client.py
@@ -16,7 +16,7 @@
 from lxml import etree
 import urllib
 
-from tempest.common.rest_client import RestClientXML
+from tempest.common import rest_client
 from tempest import config
 from tempest import exceptions
 from tempest.services.compute.xml.common import Document
@@ -28,7 +28,8 @@
 CONF = config.CONF
 
 
-class SecurityGroupsClientXML(RestClientXML):
+class SecurityGroupsClientXML(rest_client.RestClient):
+    TYPE = "xml"
 
     def __init__(self, auth_provider):
         super(SecurityGroupsClientXML, self).__init__(auth_provider)
diff --git a/tempest/services/compute/xml/servers_client.py b/tempest/services/compute/xml/servers_client.py
index a182d35..da01b83 100644
--- a/tempest/services/compute/xml/servers_client.py
+++ b/tempest/services/compute/xml/servers_client.py
@@ -19,7 +19,7 @@
 
 from lxml import etree
 
-from tempest.common.rest_client import RestClientXML
+from tempest.common import rest_client
 from tempest.common import waiters
 from tempest import config
 from tempest import exceptions
@@ -139,7 +139,8 @@
     return json
 
 
-class ServersClientXML(RestClientXML):
+class ServersClientXML(rest_client.RestClient):
+    TYPE = "xml"
 
     def __init__(self, auth_provider):
         super(ServersClientXML, self).__init__(auth_provider)
diff --git a/tempest/services/compute/xml/services_client.py b/tempest/services/compute/xml/services_client.py
index 5943ea9..d7b8a60 100644
--- a/tempest/services/compute/xml/services_client.py
+++ b/tempest/services/compute/xml/services_client.py
@@ -18,7 +18,7 @@
 
 from lxml import etree
 
-from tempest.common.rest_client import RestClientXML
+from tempest.common import rest_client
 from tempest import config
 from tempest.services.compute.xml.common import Document
 from tempest.services.compute.xml.common import Element
@@ -27,7 +27,8 @@
 CONF = config.CONF
 
 
-class ServicesClientXML(RestClientXML):
+class ServicesClientXML(rest_client.RestClient):
+    TYPE = "xml"
 
     def __init__(self, auth_provider):
         super(ServicesClientXML, self).__init__(auth_provider)
diff --git a/tempest/services/compute/xml/tenant_usages_client.py b/tempest/services/compute/xml/tenant_usages_client.py
index 96c3147..79f0ac9 100644
--- a/tempest/services/compute/xml/tenant_usages_client.py
+++ b/tempest/services/compute/xml/tenant_usages_client.py
@@ -17,14 +17,15 @@
 
 from lxml import etree
 
-from tempest.common.rest_client import RestClientXML
+from tempest.common import rest_client
 from tempest import config
 from tempest.services.compute.xml.common import xml_to_json
 
 CONF = config.CONF
 
 
-class TenantUsagesClientXML(RestClientXML):
+class TenantUsagesClientXML(rest_client.RestClient):
+    TYPE = "xml"
 
     def __init__(self, auth_provider):
         super(TenantUsagesClientXML, self).__init__(auth_provider)
diff --git a/tempest/services/compute/xml/volumes_extensions_client.py b/tempest/services/compute/xml/volumes_extensions_client.py
index a43fc21..570b715 100644
--- a/tempest/services/compute/xml/volumes_extensions_client.py
+++ b/tempest/services/compute/xml/volumes_extensions_client.py
@@ -18,7 +18,7 @@
 
 from lxml import etree
 
-from tempest.common.rest_client import RestClientXML
+from tempest.common import rest_client
 from tempest import config
 from tempest import exceptions
 from tempest.services.compute.xml.common import Document
@@ -30,7 +30,8 @@
 CONF = config.CONF
 
 
-class VolumesExtensionsClientXML(RestClientXML):
+class VolumesExtensionsClientXML(rest_client.RestClient):
+    TYPE = "xml"
 
     def __init__(self, auth_provider):
         super(VolumesExtensionsClientXML, self).__init__(
diff --git a/tempest/services/identity/v3/xml/credentials_client.py b/tempest/services/identity/v3/xml/credentials_client.py
index f6fa678..22ed44d 100644
--- a/tempest/services/identity/v3/xml/credentials_client.py
+++ b/tempest/services/identity/v3/xml/credentials_client.py
@@ -17,7 +17,7 @@
 
 from lxml import etree
 
-from tempest.common.rest_client import RestClientXML
+from tempest.common import rest_client
 from tempest import config
 from tempest.services.compute.xml.common import Document
 from tempest.services.compute.xml.common import Element
@@ -29,7 +29,8 @@
 XMLNS = "http://docs.openstack.org/identity/api/v3"
 
 
-class CredentialsClientXML(RestClientXML):
+class CredentialsClientXML(rest_client.RestClient):
+    TYPE = "xml"
 
     def __init__(self, auth_provider):
         super(CredentialsClientXML, self).__init__(auth_provider)
diff --git a/tempest/services/identity/v3/xml/endpoints_client.py b/tempest/services/identity/v3/xml/endpoints_client.py
index 2a88c15..a32eede 100644
--- a/tempest/services/identity/v3/xml/endpoints_client.py
+++ b/tempest/services/identity/v3/xml/endpoints_client.py
@@ -16,7 +16,7 @@
 from lxml import etree
 
 from tempest.common import http
-from tempest.common.rest_client import RestClientXML
+from tempest.common import rest_client
 from tempest import config
 from tempest.services.compute.xml.common import Document
 from tempest.services.compute.xml.common import Element
@@ -27,7 +27,8 @@
 XMLNS = "http://docs.openstack.org/identity/api/v3"
 
 
-class EndPointClientXML(RestClientXML):
+class EndPointClientXML(rest_client.RestClient):
+    TYPE = "xml"
 
     def __init__(self, auth_provider):
         super(EndPointClientXML, self).__init__(auth_provider)
diff --git a/tempest/services/identity/v3/xml/identity_client.py b/tempest/services/identity/v3/xml/identity_client.py
index 5ae0461..e8e70d8 100644
--- a/tempest/services/identity/v3/xml/identity_client.py
+++ b/tempest/services/identity/v3/xml/identity_client.py
@@ -17,7 +17,7 @@
 
 from lxml import etree
 
-from tempest.common.rest_client import RestClientXML
+from tempest.common import rest_client
 from tempest import config
 from tempest import exceptions
 from tempest.services.compute.xml.common import Document
@@ -30,7 +30,8 @@
 XMLNS = "http://docs.openstack.org/identity/api/v3"
 
 
-class IdentityV3ClientXML(RestClientXML):
+class IdentityV3ClientXML(rest_client.RestClient):
+    TYPE = "xml"
 
     def __init__(self, auth_provider):
         super(IdentityV3ClientXML, self).__init__(auth_provider)
@@ -426,7 +427,8 @@
         return resp, body
 
 
-class V3TokenClientXML(RestClientXML):
+class V3TokenClientXML(rest_client.RestClient):
+    TYPE = "xml"
 
     def __init__(self):
         super(V3TokenClientXML, self).__init__(None)
diff --git a/tempest/services/identity/v3/xml/policy_client.py b/tempest/services/identity/v3/xml/policy_client.py
index a7e63a7..c12018a 100644
--- a/tempest/services/identity/v3/xml/policy_client.py
+++ b/tempest/services/identity/v3/xml/policy_client.py
@@ -16,7 +16,7 @@
 from lxml import etree
 
 from tempest.common import http
-from tempest.common.rest_client import RestClientXML
+from tempest.common import rest_client
 from tempest import config
 from tempest.services.compute.xml.common import Document
 from tempest.services.compute.xml.common import Element
@@ -27,7 +27,8 @@
 XMLNS = "http://docs.openstack.org/identity/api/v3"
 
 
-class PolicyClientXML(RestClientXML):
+class PolicyClientXML(rest_client.RestClient):
+    TYPE = "xml"
 
     def __init__(self, auth_provider):
         super(PolicyClientXML, self).__init__(auth_provider)
diff --git a/tempest/services/identity/v3/xml/service_client.py b/tempest/services/identity/v3/xml/service_client.py
index be6c443..d5476c4 100644
--- a/tempest/services/identity/v3/xml/service_client.py
+++ b/tempest/services/identity/v3/xml/service_client.py
@@ -15,7 +15,7 @@
 
 from lxml import etree
 
-from tempest.common.rest_client import RestClientXML
+from tempest.common import rest_client
 from tempest import config
 from tempest.services.compute.xml.common import Document
 from tempest.services.compute.xml.common import Element
@@ -26,7 +26,8 @@
 XMLNS = "http://docs.openstack.org/identity/api/v3"
 
 
-class ServiceClientXML(RestClientXML):
+class ServiceClientXML(rest_client.RestClient):
+    TYPE = "xml"
 
     def __init__(self, auth_provider):
         super(ServiceClientXML, self).__init__(auth_provider)
diff --git a/tempest/services/network/xml/network_client.py b/tempest/services/network/xml/network_client.py
index e6f5c08..f6ae718 100644
--- a/tempest/services/network/xml/network_client.py
+++ b/tempest/services/network/xml/network_client.py
@@ -13,7 +13,7 @@
 from lxml import etree
 import xml.etree.ElementTree as ET
 
-from tempest.common.rest_client import RestClientXML
+from tempest.common import rest_client
 from tempest.services.compute.xml.common import deep_dict_to_xml
 from tempest.services.compute.xml.common import Document
 from tempest.services.compute.xml.common import Element
@@ -23,13 +23,16 @@
 
 
 class NetworkClientXML(client_base.NetworkClientBase):
+    TYPE = "xml"
 
     # list of plurals used for xml serialization
     PLURALS = ['dns_nameservers', 'host_routes', 'allocation_pools',
-               'fixed_ips', 'extensions']
+               'fixed_ips', 'extensions', 'extra_dhcp_opts']
 
     def get_rest_client(self, auth_provider):
-        return RestClientXML(auth_provider)
+        rc = rest_client.RestClient(auth_provider)
+        rc.TYPE = self.TYPE
+        return rc
 
     def _parse_array(self, node):
         array = []
@@ -74,6 +77,18 @@
             xml_elem = Element(name)
             xml_elem.add_attr("xsi:nil", "true")
             return xml_elem
+        elif isinstance(value, dict):
+            dict_element = Element(name)
+            for key, value in value.iteritems():
+                elem = self._get_element(key, value)
+                dict_element.append(elem)
+            return dict_element
+        elif isinstance(value, list):
+            list_element = Element(name)
+            for element in value:
+                elem = self._get_element(name[:-1], element)
+                list_element.append(elem)
+            return list_element
         else:
             return Element(name, value)
 
diff --git a/tempest/services/telemetry/xml/telemetry_client.py b/tempest/services/telemetry/xml/telemetry_client.py
index f29fe22..165f29a 100644
--- a/tempest/services/telemetry/xml/telemetry_client.py
+++ b/tempest/services/telemetry/xml/telemetry_client.py
@@ -15,16 +15,19 @@
 
 from lxml import etree
 
-from tempest.common.rest_client import RestClientXML
+from tempest.common import rest_client
 from tempest.services.compute.xml.common import Document
 from tempest.services.compute.xml.common import xml_to_json
 import tempest.services.telemetry.telemetry_client_base as client
 
 
 class TelemetryClientXML(client.TelemetryClientBase):
+    TYPE = "xml"
 
     def get_rest_client(self, auth_provider):
-        return RestClientXML(auth_provider)
+        rc = rest_client.RestClient(auth_provider)
+        rc.TYPE = self.TYPE
+        return rc
 
     def _parse_array(self, body):
         array = []
diff --git a/tempest/services/volume/v2/xml/volumes_client.py b/tempest/services/volume/v2/xml/volumes_client.py
index 69e3f5b..bc57842 100644
--- a/tempest/services/volume/v2/xml/volumes_client.py
+++ b/tempest/services/volume/v2/xml/volumes_client.py
@@ -18,7 +18,7 @@
 
 from lxml import etree
 
-from tempest.common.rest_client import RestClientXML
+from tempest.common import rest_client
 from tempest import config
 from tempest import exceptions
 from tempest.services.compute.xml.common import Document
@@ -30,10 +30,11 @@
 CONF = config.CONF
 
 
-class VolumesV2ClientXML(RestClientXML):
+class VolumesV2ClientXML(rest_client.RestClient):
     """
     Client class to send CRUD Volume API requests to a Cinder endpoint
     """
+    TYPE = "xml"
 
     def __init__(self, auth_provider):
         super(VolumesV2ClientXML, self).__init__(auth_provider)
diff --git a/tempest/services/volume/xml/admin/volume_hosts_client.py b/tempest/services/volume/xml/admin/volume_hosts_client.py
index 080e3d1..fb84c83 100644
--- a/tempest/services/volume/xml/admin/volume_hosts_client.py
+++ b/tempest/services/volume/xml/admin/volume_hosts_client.py
@@ -17,17 +17,18 @@
 
 from lxml import etree
 
-from tempest.common.rest_client import RestClientXML
+from tempest.common import rest_client
 from tempest import config
 from tempest.services.compute.xml.common import xml_to_json
 
 CONF = config.CONF
 
 
-class VolumeHostsClientXML(RestClientXML):
+class VolumeHostsClientXML(rest_client.RestClient):
     """
     Client class to send CRUD Volume Hosts API requests to a Cinder endpoint
     """
+    TYPE = "xml"
 
     def __init__(self, auth_provider):
         super(VolumeHostsClientXML, self).__init__(auth_provider)
diff --git a/tempest/services/volume/xml/admin/volume_types_client.py b/tempest/services/volume/xml/admin/volume_types_client.py
index 802d27a..77bafec 100644
--- a/tempest/services/volume/xml/admin/volume_types_client.py
+++ b/tempest/services/volume/xml/admin/volume_types_client.py
@@ -17,7 +17,7 @@
 
 from lxml import etree
 
-from tempest.common.rest_client import RestClientXML
+from tempest.common import rest_client
 from tempest import config
 from tempest import exceptions
 from tempest.services.compute.xml.common import Document
@@ -29,10 +29,11 @@
 CONF = config.CONF
 
 
-class VolumeTypesClientXML(RestClientXML):
+class VolumeTypesClientXML(rest_client.RestClient):
     """
     Client class to send CRUD Volume Types API requests to a Cinder endpoint
     """
+    TYPE = "xml"
 
     def __init__(self, auth_provider):
         super(VolumeTypesClientXML, self).__init__(auth_provider)
diff --git a/tempest/services/volume/xml/backups_client.py b/tempest/services/volume/xml/backups_client.py
index 6a71f8b..81caaee 100644
--- a/tempest/services/volume/xml/backups_client.py
+++ b/tempest/services/volume/xml/backups_client.py
@@ -13,13 +13,14 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-from tempest.common.rest_client import RestClientXML
+from tempest.services.volume.json import backups_client
 
 
-class BackupsClientXML(RestClientXML):
+class BackupsClientXML(backups_client.BackupsClientJSON):
     """
     Client class to send CRUD Volume Backup API requests to a Cinder endpoint
     """
+    TYPE = "xml"
 
     #TODO(gfidente): XML client isn't yet implemented because of bug 1270589
     pass
diff --git a/tempest/services/volume/xml/extensions_client.py b/tempest/services/volume/xml/extensions_client.py
index 03743a6..1ea974f 100644
--- a/tempest/services/volume/xml/extensions_client.py
+++ b/tempest/services/volume/xml/extensions_client.py
@@ -15,14 +15,15 @@
 
 from lxml import etree
 
-from tempest.common.rest_client import RestClientXML
+from tempest.common import rest_client
 from tempest import config
 from tempest.services.compute.xml.common import xml_to_json
 
 CONF = config.CONF
 
 
-class ExtensionsClientXML(RestClientXML):
+class ExtensionsClientXML(rest_client.RestClient):
+    TYPE = "xml"
 
     def __init__(self, auth_provider):
         super(ExtensionsClientXML, self).__init__(auth_provider)
diff --git a/tempest/services/volume/xml/snapshots_client.py b/tempest/services/volume/xml/snapshots_client.py
index 9abe042..458001b 100644
--- a/tempest/services/volume/xml/snapshots_client.py
+++ b/tempest/services/volume/xml/snapshots_client.py
@@ -15,7 +15,7 @@
 
 from lxml import etree
 
-from tempest.common.rest_client import RestClientXML
+from tempest.common import rest_client
 from tempest import config
 from tempest import exceptions
 from tempest.openstack.common import log as logging
@@ -30,8 +30,9 @@
 LOG = logging.getLogger(__name__)
 
 
-class SnapshotsClientXML(RestClientXML):
+class SnapshotsClientXML(rest_client.RestClient):
     """Client class to send CRUD Volume API requests."""
+    TYPE = "xml"
 
     def __init__(self, auth_provider):
         super(SnapshotsClientXML, self).__init__(auth_provider)
diff --git a/tempest/services/volume/xml/volumes_client.py b/tempest/services/volume/xml/volumes_client.py
index 94c1ff6..aef1e3c 100644
--- a/tempest/services/volume/xml/volumes_client.py
+++ b/tempest/services/volume/xml/volumes_client.py
@@ -19,7 +19,7 @@
 from lxml import etree
 from xml.sax.saxutils import escape
 
-from tempest.common.rest_client import RestClientXML
+from tempest.common import rest_client
 from tempest import config
 from tempest import exceptions
 from tempest.services.compute.xml.common import Document
@@ -31,10 +31,11 @@
 CONF = config.CONF
 
 
-class VolumesClientXML(RestClientXML):
+class VolumesClientXML(rest_client.RestClient):
     """
     Client class to send CRUD Volume API requests to a Cinder endpoint
     """
+    TYPE = "xml"
 
     def __init__(self, auth_provider):
         super(VolumesClientXML, self).__init__(auth_provider)
diff --git a/tempest/stress/run_stress.py b/tempest/stress/run_stress.py
index 76320d0..a6c2b77 100755
--- a/tempest/stress/run_stress.py
+++ b/tempest/stress/run_stress.py
@@ -87,8 +87,13 @@
             # NOTE(mkoderer): we just save the last result code
             if (step_result != 0):
                 result = step_result
+                if ns.stop:
+                    return result
     else:
-        driver.stress_openstack(tests, ns.duration, ns.number, ns.stop)
+        result = driver.stress_openstack(tests,
+                                         ns.duration,
+                                         ns.number,
+                                         ns.stop)
     return result
 
 
diff --git a/tools/verify_tempest_config.py b/tools/verify_tempest_config.py
index 29eed9d..4be812c 100755
--- a/tools/verify_tempest_config.py
+++ b/tools/verify_tempest_config.py
@@ -42,7 +42,12 @@
 def verify_nova_api_versions(os):
     # Check nova api versions - only get base URL without PATH
     os.servers_client.skip_path = True
-    __, body = RAW_HTTP.request(os.servers_client.base_url, 'GET')
+    # The nova base endpoint url includes the version but to get the versions
+    # list the unversioned endpoint is needed
+    v2_endpoint = os.servers_client.base_url
+    v2_endpoint_parts = v2_endpoint.split('/')
+    endpoint = v2_endpoint_parts[0] + '//' + v2_endpoint_parts[2]
+    __, body = RAW_HTTP.request(endpoint, 'GET')
     body = json.loads(body)
     # Restore full base_url
     os.servers_client.skip_path = False