From: Igor Duarte Cardoso <igor.duarte.cardoso@intel.com>
Date: Mon, 14 Aug 2017 16:39:34 +0000 (+0000)
Subject: Implements SFC CRUD interface in OpenStack vimconn
X-Git-Tag: v3.0.0~12^2
X-Git-Url: https://osm.etsi.org/gitweb/?a=commitdiff_plain;h=refs%2Fchanges%2F69%2F2069%2F7;p=osm%2FRO.git

Implements SFC CRUD interface in OpenStack vimconn

Change vimconn_openstack.py to implement the SFC functions
specified by the SFC interface in vimconn.py.

The OpenStack VIM connector calls the networking-sfc Neutron
extension methods, whose resources are mapped to the VIM
connector's SFC resources as follows:
- Classification (OSM) -> Flow Classifier (Neutron)
- Service Function Instance (OSM) -> Port Pair (Neutron)
- Service Function (OSM) -> Port Pair Group (Neutron)
- Service Function Path (OSM) -> Port Chain (Neutron)

Also adds unit tests.

This relates to feature 638.

Change-Id: I501837bfaed6638a7b5f345fda547b746e4e7d45
Signed-off-by: Igor Duarte Cardoso <igor.duarte.cardoso@intel.com>
---

diff --git a/osm_ro/test/__init__.py b/osm_ro/test/__init__.py
new file mode 100644
index 00000000..e69de29b
diff --git a/osm_ro/test/test_vimconn_openstack.py b/osm_ro/test/test_vimconn_openstack.py
new file mode 100644
index 00000000..aa6cf3c0
--- /dev/null
+++ b/osm_ro/test/test_vimconn_openstack.py
@@ -0,0 +1,862 @@
+# -*- coding: utf-8 -*-
+
+##
+# Copyright 2017 Intel Corporation.
+#
+# 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.
+#
+# For those usages not covered by the Apache License, Version 2.0 please
+# contact with: nfvlabs@tid.es
+##
+
+"""
+This module contains unit tests for the OpenStack VIM connector
+Run this directly with python2 or python3.
+"""
+
+import copy
+import unittest
+
+import mock
+from neutronclient.v2_0.client import Client
+
+from osm_ro import vimconn
+from osm_ro.vimconn_openstack import vimconnector
+
+
+__author__ = "Igor D.C."
+__date__ = "$23-aug-2017 23:59:59$"
+
+
+class TestSfcOperations(unittest.TestCase):
+    def setUp(self):
+        # instantiate dummy VIM connector so we can test it
+        self.vimconn = vimconnector(
+            '123', 'openstackvim', '456', '789', 'http://dummy.url', None,
+            'user', 'pass')
+
+    def _test_new_sfi(self, create_port_pair, sfc_encap,
+                      ingress_ports=['5311c75d-d718-4369-bbda-cdcc6da60fcc'],
+                      egress_ports=['230cdf1b-de37-4891-bc07-f9010cf1f967']):
+        # input to VIM connector
+        name = 'osm_sfi'
+        # + ingress_ports
+        # + egress_ports
+        # TODO(igordc): must be changed to NSH in Queens (MPLS is a workaround)
+        correlation = 'mpls'
+        if sfc_encap is not None:
+            if not sfc_encap:
+                correlation = None
+
+        # what OpenStack is assumed to respond (patch OpenStack's return value)
+        dict_from_neutron = {'port_pair': {
+            'id': '3d7ddc13-923c-4332-971e-708ed82902ce',
+            'name': name,
+            'description': '',
+            'tenant_id': '130b1e97-b0f1-40a8-8804-b6ad9b8c3e0c',
+            'project_id': '130b1e97-b0f1-40a8-8804-b6ad9b8c3e0c',
+            'ingress': ingress_ports[0] if len(ingress_ports) else None,
+            'egress': egress_ports[0] if len(egress_ports) else None,
+            'service_function_parameters': {'correlation': correlation}
+        }}
+        create_port_pair.return_value = dict_from_neutron
+
+        # what the VIM connector is expected to
+        # send to OpenStack based on the input
+        dict_to_neutron = {'port_pair': {
+            'name': name,
+            'ingress': '5311c75d-d718-4369-bbda-cdcc6da60fcc',
+            'egress': '230cdf1b-de37-4891-bc07-f9010cf1f967',
+            'service_function_parameters': {'correlation': correlation}
+        }}
+
+        # call the VIM connector
+        if sfc_encap is None:
+            result = self.vimconn.new_sfi(name, ingress_ports, egress_ports)
+        else:
+            result = self.vimconn.new_sfi(name, ingress_ports, egress_ports,
+                                          sfc_encap)
+
+        # assert that the VIM connector made the expected call to OpenStack
+        create_port_pair.assert_called_with(dict_to_neutron)
+        # assert that the VIM connector had the expected result / return value
+        self.assertEqual(result, dict_from_neutron['port_pair']['id'])
+
+    def _test_new_sf(self, create_port_pair_group):
+        # input to VIM connector
+        name = 'osm_sf'
+        instances = ['bbd01220-cf72-41f2-9e70-0669c2e5c4cd',
+                     '12ba215e-3987-4892-bd3a-d0fd91eecf98',
+                     'e25a7c79-14c8-469a-9ae1-f601c9371ffd']
+
+        # what OpenStack is assumed to respond (patch OpenStack's return value)
+        dict_from_neutron = {'port_pair_group': {
+            'id': '3d7ddc13-923c-4332-971e-708ed82902ce',
+            'name': name,
+            'description': '',
+            'tenant_id': '130b1e97-b0f1-40a8-8804-b6ad9b8c3e0c',
+            'project_id': '130b1e97-b0f1-40a8-8804-b6ad9b8c3e0c',
+            'port_pairs': instances,
+            'group_id': 1,
+            'port_pair_group_parameters': {
+                "lb_fields": [],
+                "ppg_n_tuple_mapping": {
+                    "ingress_n_tuple": {},
+                    "egress_n_tuple": {}
+                }}
+        }}
+        create_port_pair_group.return_value = dict_from_neutron
+
+        # what the VIM connector is expected to
+        # send to OpenStack based on the input
+        dict_to_neutron = {'port_pair_group': {
+            'name': name,
+            'port_pairs': ['bbd01220-cf72-41f2-9e70-0669c2e5c4cd',
+                           '12ba215e-3987-4892-bd3a-d0fd91eecf98',
+                           'e25a7c79-14c8-469a-9ae1-f601c9371ffd']
+        }}
+
+        # call the VIM connector
+        result = self.vimconn.new_sf(name, instances)
+
+        # assert that the VIM connector made the expected call to OpenStack
+        create_port_pair_group.assert_called_with(dict_to_neutron)
+        # assert that the VIM connector had the expected result / return value
+        self.assertEqual(result, dict_from_neutron['port_pair_group']['id'])
+
+    def _test_new_sfp(self, create_port_chain, sfc_encap, spi):
+        # input to VIM connector
+        name = 'osm_sfp'
+        classifications = ['2bd2a2e5-c5fd-4eac-a297-d5e255c35c19',
+                           '00f23389-bdfa-43c2-8b16-5815f2582fa8']
+        sfs = ['2314daec-c262-414a-86e3-69bb6fa5bc16',
+               'd8bfdb5d-195e-4f34-81aa-6135705317df']
+
+        # TODO(igordc): must be changed to NSH in Queens (MPLS is a workaround)
+        correlation = 'mpls'
+        chain_id = 33
+        if sfc_encap is not None:
+            if not sfc_encap:
+                correlation = None
+        if spi:
+            chain_id = spi
+
+        # what OpenStack is assumed to respond (patch OpenStack's return value)
+        dict_from_neutron = {'port_chain': {
+            'id': '5bc05721-079b-4b6e-a235-47cac331cbb6',
+            'name': name,
+            'description': '',
+            'tenant_id': '130b1e97-b0f1-40a8-8804-b6ad9b8c3e0c',
+            'project_id': '130b1e97-b0f1-40a8-8804-b6ad9b8c3e0c',
+            'chain_id': chain_id,
+            'flow_classifiers': classifications,
+            'port_pair_groups': sfs,
+            'chain_parameters': {'correlation': correlation}
+        }}
+        create_port_chain.return_value = dict_from_neutron
+
+        # what the VIM connector is expected to
+        # send to OpenStack based on the input
+        dict_to_neutron = {'port_chain': {
+            'name': name,
+            'flow_classifiers': ['2bd2a2e5-c5fd-4eac-a297-d5e255c35c19',
+                                 '00f23389-bdfa-43c2-8b16-5815f2582fa8'],
+            'port_pair_groups': ['2314daec-c262-414a-86e3-69bb6fa5bc16',
+                                 'd8bfdb5d-195e-4f34-81aa-6135705317df'],
+            'chain_parameters': {'correlation': correlation}
+        }}
+        if spi:
+            dict_to_neutron['port_chain']['chain_id'] = spi
+
+        # call the VIM connector
+        if sfc_encap is None:
+            if spi is None:
+                result = self.vimconn.new_sfp(name, classifications, sfs)
+            else:
+                result = self.vimconn.new_sfp(name, classifications, sfs,
+                                              spi=spi)
+        else:
+            if spi is None:
+                result = self.vimconn.new_sfp(name, classifications, sfs,
+                                              sfc_encap)
+            else:
+                result = self.vimconn.new_sfp(name, classifications, sfs,
+                                              sfc_encap, spi)
+
+        # assert that the VIM connector made the expected call to OpenStack
+        create_port_chain.assert_called_with(dict_to_neutron)
+        # assert that the VIM connector had the expected result / return value
+        self.assertEqual(result, dict_from_neutron['port_chain']['id'])
+
+    def _test_new_classification(self, create_flow_classifier, ctype):
+        # input to VIM connector
+        name = 'osm_classification'
+        definition = {'ethertype': 'IPv4',
+                      'logical_source_port':
+                          'aaab0ab0-1452-4636-bb3b-11dca833fa2b',
+                      'protocol': 'tcp',
+                      'source_ip_prefix': '192.168.2.0/24',
+                      'source_port_range_max': 99,
+                      'source_port_range_min': 50}
+
+        # what OpenStack is assumed to respond (patch OpenStack's return value)
+        dict_from_neutron = {'flow_classifier': copy.copy(definition)}
+        dict_from_neutron['flow_classifier'][
+            'id'] = '7735ec2c-fddf-4130-9712-32ed2ab6a372'
+        dict_from_neutron['flow_classifier']['name'] = name
+        dict_from_neutron['flow_classifier']['description'] = ''
+        dict_from_neutron['flow_classifier'][
+            'tenant_id'] = '130b1e97-b0f1-40a8-8804-b6ad9b8c3e0c'
+        dict_from_neutron['flow_classifier'][
+            'project_id'] = '130b1e97-b0f1-40a8-8804-b6ad9b8c3e0c'
+        create_flow_classifier.return_value = dict_from_neutron
+
+        # what the VIM connector is expected to
+        # send to OpenStack based on the input
+        dict_to_neutron = {'flow_classifier': copy.copy(definition)}
+        dict_to_neutron['flow_classifier']['name'] = 'osm_classification'
+
+        # call the VIM connector
+        result = self.vimconn.new_classification(name, ctype, definition)
+
+        # assert that the VIM connector made the expected call to OpenStack
+        create_flow_classifier.assert_called_with(dict_to_neutron)
+        # assert that the VIM connector had the expected result / return value
+        self.assertEqual(result, dict_from_neutron['flow_classifier']['id'])
+
+    @mock.patch.object(Client, 'create_flow_classifier')
+    def test_new_classification(self, create_flow_classifier):
+        self._test_new_classification(create_flow_classifier,
+                                      'legacy_flow_classifier')
+
+    @mock.patch.object(Client, 'create_flow_classifier')
+    def test_new_classification_unsupported_type(self, create_flow_classifier):
+        self.assertRaises(vimconn.vimconnNotSupportedException,
+                          self._test_new_classification,
+                          create_flow_classifier, 'h265')
+
+    @mock.patch.object(Client, 'create_port_pair')
+    def test_new_sfi_with_sfc_encap(self, create_port_pair):
+        self._test_new_sfi(create_port_pair, True)
+
+    @mock.patch.object(Client, 'create_port_pair')
+    def test_new_sfi_without_sfc_encap(self, create_port_pair):
+        self._test_new_sfi(create_port_pair, False)
+
+    @mock.patch.object(Client, 'create_port_pair')
+    def test_new_sfi_default_sfc_encap(self, create_port_pair):
+        self._test_new_sfi(create_port_pair, None)
+
+    @mock.patch.object(Client, 'create_port_pair')
+    def test_new_sfi_bad_ingress_ports(self, create_port_pair):
+        ingress_ports = ['5311c75d-d718-4369-bbda-cdcc6da60fcc',
+                         'a0273f64-82c9-11e7-b08f-6328e53f0fa7']
+        self.assertRaises(vimconn.vimconnNotSupportedException,
+                          self._test_new_sfi,
+                          create_port_pair, True, ingress_ports=ingress_ports)
+        ingress_ports = []
+        self.assertRaises(vimconn.vimconnNotSupportedException,
+                          self._test_new_sfi,
+                          create_port_pair, True, ingress_ports=ingress_ports)
+
+    @mock.patch.object(Client, 'create_port_pair')
+    def test_new_sfi_bad_egress_ports(self, create_port_pair):
+        egress_ports = ['230cdf1b-de37-4891-bc07-f9010cf1f967',
+                        'b41228fe-82c9-11e7-9b44-17504174320b']
+        self.assertRaises(vimconn.vimconnNotSupportedException,
+                          self._test_new_sfi,
+                          create_port_pair, True, egress_ports=egress_ports)
+        egress_ports = []
+        self.assertRaises(vimconn.vimconnNotSupportedException,
+                          self._test_new_sfi,
+                          create_port_pair, True, egress_ports=egress_ports)
+
+    @mock.patch.object(vimconnector, 'get_sfi')
+    @mock.patch.object(Client, 'create_port_pair_group')
+    def test_new_sf(self, create_port_pair_group, get_sfi):
+        get_sfi.return_value = {'sfc_encap': 'mpls'}
+        self._test_new_sf(create_port_pair_group)
+
+    @mock.patch.object(vimconnector, 'get_sfi')
+    @mock.patch.object(Client, 'create_port_pair_group')
+    def test_new_sf_inconsistent_sfc_encap(self, create_port_pair_group,
+                                           get_sfi):
+        get_sfi.return_value = {'sfc_encap': 'nsh'}
+        self.assertRaises(vimconn.vimconnNotSupportedException,
+                          self._test_new_sf, create_port_pair_group)
+
+    @mock.patch.object(Client, 'create_port_chain')
+    def test_new_sfp_with_sfc_encap(self, create_port_chain):
+        self._test_new_sfp(create_port_chain, True, None)
+
+    @mock.patch.object(Client, 'create_port_chain')
+    def test_new_sfp_without_sfc_encap(self, create_port_chain):
+        self.assertRaises(vimconn.vimconnNotSupportedException,
+                          self._test_new_sfp,
+                          create_port_chain, False, None)
+        self.assertRaises(vimconn.vimconnNotSupportedException,
+                          self._test_new_sfp,
+                          create_port_chain, False, 25)
+
+    @mock.patch.object(Client, 'create_port_chain')
+    def test_new_sfp_default_sfc_encap(self, create_port_chain):
+        self._test_new_sfp(create_port_chain, None, None)
+
+    @mock.patch.object(Client, 'create_port_chain')
+    def test_new_sfp_with_sfc_encap_spi(self, create_port_chain):
+        self._test_new_sfp(create_port_chain, True, 25)
+
+    @mock.patch.object(Client, 'create_port_chain')
+    def test_new_sfp_default_sfc_encap_spi(self, create_port_chain):
+        self._test_new_sfp(create_port_chain, None, 25)
+
+    @mock.patch.object(Client, 'list_flow_classifier')
+    def test_get_classification_list(self, list_flow_classifier):
+        # what OpenStack is assumed to return to the VIM connector
+        list_flow_classifier.return_value = {'flow_classifiers': [
+            {'source_port_range_min': 2000,
+             'destination_ip_prefix': '192.168.3.0/24',
+             'protocol': 'udp',
+             'description': '',
+             'ethertype': 'IPv4',
+             'l7_parameters': {},
+             'source_port_range_max': 2000,
+             'destination_port_range_min': 3000,
+             'source_ip_prefix': '192.168.2.0/24',
+             'logical_destination_port': None,
+             'tenant_id': '8f3019ef06374fa880a0144ad4bc1d7b',
+             'destination_port_range_max': None,
+             'project_id': '8f3019ef06374fa880a0144ad4bc1d7b',
+             'logical_source_port': 'aaab0ab0-1452-4636-bb3b-11dca833fa2b',
+             'id': '22198366-d4e8-4d6b-b4d2-637d5d6cbb7d',
+             'name': 'fc1'}]}
+
+        # call the VIM connector
+        filter_dict = {'protocol': 'tcp', 'ethertype': 'IPv4'}
+        result = self.vimconn.get_classification_list(filter_dict.copy())
+
+        # assert that VIM connector called OpenStack with the expected filter
+        list_flow_classifier.assert_called_with(**filter_dict)
+        # assert that the VIM connector successfully
+        # translated and returned the OpenStack result
+        self.assertEqual(result, [
+            {'id': '22198366-d4e8-4d6b-b4d2-637d5d6cbb7d',
+             'name': 'fc1',
+             'description': '',
+             'project_id': '8f3019ef06374fa880a0144ad4bc1d7b',
+             'tenant_id': '8f3019ef06374fa880a0144ad4bc1d7b',
+             'ctype': 'legacy_flow_classifier',
+             'definition': {
+                 'source_port_range_min': 2000,
+                 'destination_ip_prefix': '192.168.3.0/24',
+                 'protocol': 'udp',
+                 'ethertype': 'IPv4',
+                 'l7_parameters': {},
+                 'source_port_range_max': 2000,
+                 'destination_port_range_min': 3000,
+                 'source_ip_prefix': '192.168.2.0/24',
+                 'logical_destination_port': None,
+                 'destination_port_range_max': None,
+                 'logical_source_port': 'aaab0ab0-1452-4636-bb3b-11dca833fa2b'}
+             }])
+
+    def _test_get_sfi_list(self, list_port_pair, correlation, sfc_encap):
+        # what OpenStack is assumed to return to the VIM connector
+        list_port_pair.return_value = {'port_pairs': [
+            {'ingress': '5311c75d-d718-4369-bbda-cdcc6da60fcc',
+             'description': '',
+             'tenant_id': '8f3019ef06374fa880a0144ad4bc1d7b',
+             'egress': '5311c75d-d718-4369-bbda-cdcc6da60fcc',
+             'service_function_parameters': {'correlation': correlation},
+             'project_id': '8f3019ef06374fa880a0144ad4bc1d7b',
+             'id': 'c121ebdd-7f2d-4213-b933-3325298a6966',
+             'name': 'osm_sfi'}]}
+
+        # call the VIM connector
+        filter_dict = {'name': 'osm_sfi', 'description': ''}
+        result = self.vimconn.get_sfi_list(filter_dict.copy())
+
+        # assert that VIM connector called OpenStack with the expected filter
+        list_port_pair.assert_called_with(**filter_dict)
+        # assert that the VIM connector successfully
+        # translated and returned the OpenStack result
+        self.assertEqual(result, [
+            {'ingress_ports': ['5311c75d-d718-4369-bbda-cdcc6da60fcc'],
+             'description': '',
+             'tenant_id': '8f3019ef06374fa880a0144ad4bc1d7b',
+             'egress_ports': ['5311c75d-d718-4369-bbda-cdcc6da60fcc'],
+             'sfc_encap': sfc_encap,
+             'project_id': '8f3019ef06374fa880a0144ad4bc1d7b',
+             'id': 'c121ebdd-7f2d-4213-b933-3325298a6966',
+             'name': 'osm_sfi'}])
+
+    @mock.patch.object(Client, 'list_port_pair')
+    def test_get_sfi_list_with_sfc_encap(self, list_port_pair):
+        self._test_get_sfi_list(list_port_pair, 'nsh', True)
+
+    @mock.patch.object(Client, 'list_port_pair')
+    def test_get_sfi_list_without_sfc_encap(self, list_port_pair):
+        self._test_get_sfi_list(list_port_pair, None, False)
+
+    @mock.patch.object(Client, 'list_port_pair_group')
+    def test_get_sf_list(self, list_port_pair_group):
+        # what OpenStack is assumed to return to the VIM connector
+        list_port_pair_group.return_value = {'port_pair_groups': [
+            {'port_pairs': ['08fbdbb0-82d6-11e7-ad95-9bb52fbec2f2',
+                            '0d63799c-82d6-11e7-8deb-a746bb3ae9f5'],
+             'description': '',
+             'tenant_id': '8f3019ef06374fa880a0144ad4bc1d7b',
+             'port_pair_group_parameters': {},
+             'project_id': '8f3019ef06374fa880a0144ad4bc1d7b',
+             'id': 'f4a0bde8-82d5-11e7-90e1-a72b762fa27f',
+             'name': 'osm_sf'}]}
+
+        # call the VIM connector
+        filter_dict = {'name': 'osm_sf', 'description': ''}
+        result = self.vimconn.get_sf_list(filter_dict.copy())
+
+        # assert that VIM connector called OpenStack with the expected filter
+        list_port_pair_group.assert_called_with(**filter_dict)
+        # assert that the VIM connector successfully
+        # translated and returned the OpenStack result
+        self.assertEqual(result, [
+            {'instances': ['08fbdbb0-82d6-11e7-ad95-9bb52fbec2f2',
+                           '0d63799c-82d6-11e7-8deb-a746bb3ae9f5'],
+             'description': '',
+             'tenant_id': '8f3019ef06374fa880a0144ad4bc1d7b',
+             'project_id': '8f3019ef06374fa880a0144ad4bc1d7b',
+             'id': 'f4a0bde8-82d5-11e7-90e1-a72b762fa27f',
+             'name': 'osm_sf'}])
+
+    def _test_get_sfp_list(self, list_port_chain, correlation, sfc_encap):
+        # what OpenStack is assumed to return to the VIM connector
+        list_port_chain.return_value = {'port_chains': [
+            {'port_pair_groups': ['7d8e3bf8-82d6-11e7-a032-8ff028839d25',
+                                  '7dc9013e-82d6-11e7-a5a6-a3a8d78a5518'],
+             'flow_classifiers': ['1333c2f4-82d7-11e7-a5df-9327f33d104e',
+                                  '1387ab44-82d7-11e7-9bb0-476337183905'],
+             'description': '',
+             'tenant_id': '8f3019ef06374fa880a0144ad4bc1d7b',
+             'chain_parameters': {'correlation': correlation},
+             'chain_id': 40,
+             'project_id': '8f3019ef06374fa880a0144ad4bc1d7b',
+             'id': '821bc9be-82d7-11e7-8ce3-23a08a27ab47',
+             'name': 'osm_sfp'}]}
+
+        # call the VIM connector
+        filter_dict = {'name': 'osm_sfp', 'description': ''}
+        result = self.vimconn.get_sfp_list(filter_dict.copy())
+
+        # assert that VIM connector called OpenStack with the expected filter
+        list_port_chain.assert_called_with(**filter_dict)
+        # assert that the VIM connector successfully
+        # translated and returned the OpenStack result
+        self.assertEqual(result, [
+            {'service_functions': ['7d8e3bf8-82d6-11e7-a032-8ff028839d25',
+                                   '7dc9013e-82d6-11e7-a5a6-a3a8d78a5518'],
+             'classifications': ['1333c2f4-82d7-11e7-a5df-9327f33d104e',
+                                 '1387ab44-82d7-11e7-9bb0-476337183905'],
+             'description': '',
+             'tenant_id': '8f3019ef06374fa880a0144ad4bc1d7b',
+             'project_id': '8f3019ef06374fa880a0144ad4bc1d7b',
+             'sfc_encap': sfc_encap,
+             'spi': 40,
+             'id': '821bc9be-82d7-11e7-8ce3-23a08a27ab47',
+             'name': 'osm_sfp'}])
+
+    @mock.patch.object(Client, 'list_port_chain')
+    def test_get_sfp_list_with_sfc_encap(self, list_port_chain):
+        self._test_get_sfp_list(list_port_chain, 'nsh', True)
+
+    @mock.patch.object(Client, 'list_port_chain')
+    def test_get_sfp_list_without_sfc_encap(self, list_port_chain):
+        self._test_get_sfp_list(list_port_chain, None, False)
+
+    @mock.patch.object(Client, 'list_flow_classifier')
+    def test_get_classification(self, list_flow_classifier):
+        # what OpenStack is assumed to return to the VIM connector
+        list_flow_classifier.return_value = {'flow_classifiers': [
+            {'source_port_range_min': 2000,
+             'destination_ip_prefix': '192.168.3.0/24',
+             'protocol': 'udp',
+             'description': '',
+             'ethertype': 'IPv4',
+             'l7_parameters': {},
+             'source_port_range_max': 2000,
+             'destination_port_range_min': 3000,
+             'source_ip_prefix': '192.168.2.0/24',
+             'logical_destination_port': None,
+             'tenant_id': '8f3019ef06374fa880a0144ad4bc1d7b',
+             'destination_port_range_max': None,
+             'project_id': '8f3019ef06374fa880a0144ad4bc1d7b',
+             'logical_source_port': 'aaab0ab0-1452-4636-bb3b-11dca833fa2b',
+             'id': '22198366-d4e8-4d6b-b4d2-637d5d6cbb7d',
+             'name': 'fc1'}
+        ]}
+
+        # call the VIM connector
+        result = self.vimconn.get_classification(
+            '22198366-d4e8-4d6b-b4d2-637d5d6cbb7d')
+
+        # assert that VIM connector called OpenStack with the expected filter
+        list_flow_classifier.assert_called_with(
+            id='22198366-d4e8-4d6b-b4d2-637d5d6cbb7d')
+        # assert that VIM connector successfully returned the OpenStack result
+        self.assertEqual(result,
+                         {'id': '22198366-d4e8-4d6b-b4d2-637d5d6cbb7d',
+                          'name': 'fc1',
+                          'description': '',
+                          'project_id': '8f3019ef06374fa880a0144ad4bc1d7b',
+                          'tenant_id': '8f3019ef06374fa880a0144ad4bc1d7b',
+                          'ctype': 'legacy_flow_classifier',
+                          'definition': {
+                              'source_port_range_min': 2000,
+                              'destination_ip_prefix': '192.168.3.0/24',
+                              'protocol': 'udp',
+                              'ethertype': 'IPv4',
+                              'l7_parameters': {},
+                              'source_port_range_max': 2000,
+                              'destination_port_range_min': 3000,
+                              'source_ip_prefix': '192.168.2.0/24',
+                              'logical_destination_port': None,
+                              'destination_port_range_max': None,
+                              'logical_source_port':
+                                  'aaab0ab0-1452-4636-bb3b-11dca833fa2b'}
+                          })
+
+    @mock.patch.object(Client, 'list_flow_classifier')
+    def test_get_classification_many_results(self, list_flow_classifier):
+        # what OpenStack is assumed to return to the VIM connector
+        list_flow_classifier.return_value = {'flow_classifiers': [
+            {'source_port_range_min': 2000,
+             'destination_ip_prefix': '192.168.3.0/24',
+             'protocol': 'udp',
+             'description': '',
+             'ethertype': 'IPv4',
+             'l7_parameters': {},
+             'source_port_range_max': 2000,
+             'destination_port_range_min': 3000,
+             'source_ip_prefix': '192.168.2.0/24',
+             'logical_destination_port': None,
+             'tenant_id': '8f3019ef06374fa880a0144ad4bc1d7b',
+             'destination_port_range_max': None,
+             'project_id': '8f3019ef06374fa880a0144ad4bc1d7b',
+             'logical_source_port': 'aaab0ab0-1452-4636-bb3b-11dca833fa2b',
+             'id': '22198366-d4e8-4d6b-b4d2-637d5d6cbb7d',
+             'name': 'fc1'},
+            {'source_port_range_min': 1000,
+             'destination_ip_prefix': '192.168.3.0/24',
+             'protocol': 'udp',
+             'description': '',
+             'ethertype': 'IPv4',
+             'l7_parameters': {},
+             'source_port_range_max': 1000,
+             'destination_port_range_min': 3000,
+             'source_ip_prefix': '192.168.2.0/24',
+             'logical_destination_port': None,
+             'tenant_id': '8f3019ef06374fa880a0144ad4bc1d7b',
+             'destination_port_range_max': None,
+             'project_id': '8f3019ef06374fa880a0144ad4bc1d7b',
+             'logical_source_port': 'aaab0ab0-1452-4636-bb3b-11dca833fa2b',
+             'id': '3196bafc-82dd-11e7-a205-9bf6c14b0721',
+             'name': 'fc2'}
+        ]}
+
+        # call the VIM connector
+        self.assertRaises(vimconn.vimconnConflictException,
+                          self.vimconn.get_classification,
+                          '3196bafc-82dd-11e7-a205-9bf6c14b0721')
+
+        # assert the VIM connector called OpenStack with the expected filter
+        list_flow_classifier.assert_called_with(
+            id='3196bafc-82dd-11e7-a205-9bf6c14b0721')
+
+    @mock.patch.object(Client, 'list_flow_classifier')
+    def test_get_classification_no_results(self, list_flow_classifier):
+        # what OpenStack is assumed to return to the VIM connector
+        list_flow_classifier.return_value = {'flow_classifiers': []}
+
+        # call the VIM connector
+        self.assertRaises(vimconn.vimconnNotFoundException,
+                          self.vimconn.get_classification,
+                          '3196bafc-82dd-11e7-a205-9bf6c14b0721')
+
+        # assert the VIM connector called OpenStack with the expected filter
+        list_flow_classifier.assert_called_with(
+            id='3196bafc-82dd-11e7-a205-9bf6c14b0721')
+
+    @mock.patch.object(Client, 'list_port_pair')
+    def test_get_sfi(self, list_port_pair):
+        # what OpenStack is assumed to return to the VIM connector
+        list_port_pair.return_value = {'port_pairs': [
+            {'ingress': '5311c75d-d718-4369-bbda-cdcc6da60fcc',
+             'description': '',
+             'tenant_id': '8f3019ef06374fa880a0144ad4bc1d7b',
+             'egress': '5311c75d-d718-4369-bbda-cdcc6da60fcc',
+             'service_function_parameters': {'correlation': 'nsh'},
+             'project_id': '8f3019ef06374fa880a0144ad4bc1d7b',
+             'id': 'c121ebdd-7f2d-4213-b933-3325298a6966',
+             'name': 'osm_sfi1'},
+        ]}
+
+        # call the VIM connector
+        result = self.vimconn.get_sfi('c121ebdd-7f2d-4213-b933-3325298a6966')
+
+        # assert the VIM connector called OpenStack with the expected filter
+        list_port_pair.assert_called_with(
+            id='c121ebdd-7f2d-4213-b933-3325298a6966')
+        # assert the VIM connector successfully returned the OpenStack result
+        self.assertEqual(result,
+                         {'ingress_ports': [
+                             '5311c75d-d718-4369-bbda-cdcc6da60fcc'],
+                          'egress_ports': [
+                              '5311c75d-d718-4369-bbda-cdcc6da60fcc'],
+                          'sfc_encap': True,
+                          'description': '',
+                          'tenant_id': '8f3019ef06374fa880a0144ad4bc1d7b',
+                          'project_id': '8f3019ef06374fa880a0144ad4bc1d7b',
+                          'id': 'c121ebdd-7f2d-4213-b933-3325298a6966',
+                          'name': 'osm_sfi1'})
+
+    @mock.patch.object(Client, 'list_port_pair')
+    def test_get_sfi_many_results(self, list_port_pair):
+        # what OpenStack is assumed to return to the VIM connector
+        list_port_pair.return_value = {'port_pairs': [
+            {'ingress': '5311c75d-d718-4369-bbda-cdcc6da60fcc',
+             'description': '',
+             'tenant_id': '8f3019ef06374fa880a0144ad4bc1d7b',
+             'egress': '5311c75d-d718-4369-bbda-cdcc6da60fcc',
+             'service_function_parameters': {'correlation': 'nsh'},
+             'project_id': '8f3019ef06374fa880a0144ad4bc1d7b',
+             'id': 'c121ebdd-7f2d-4213-b933-3325298a6966',
+             'name': 'osm_sfi1'},
+            {'ingress': '5311c75d-d718-4369-bbda-cdcc6da60fcc',
+             'description': '',
+             'tenant_id': '8f3019ef06374fa880a0144ad4bc1d7b',
+             'egress': '5311c75d-d718-4369-bbda-cdcc6da60fcc',
+             'service_function_parameters': {'correlation': 'nsh'},
+             'project_id': '8f3019ef06374fa880a0144ad4bc1d7b',
+             'id': 'c0436d92-82db-11e7-8f9c-5fa535f1261f',
+             'name': 'osm_sfi2'}
+        ]}
+
+        # call the VIM connector
+        self.assertRaises(vimconn.vimconnConflictException,
+                          self.vimconn.get_sfi,
+                          'c0436d92-82db-11e7-8f9c-5fa535f1261f')
+
+        # assert that VIM connector called OpenStack with the expected filter
+        list_port_pair.assert_called_with(
+            id='c0436d92-82db-11e7-8f9c-5fa535f1261f')
+
+    @mock.patch.object(Client, 'list_port_pair')
+    def test_get_sfi_no_results(self, list_port_pair):
+        # what OpenStack is assumed to return to the VIM connector
+        list_port_pair.return_value = {'port_pairs': []}
+
+        # call the VIM connector
+        self.assertRaises(vimconn.vimconnNotFoundException,
+                          self.vimconn.get_sfi,
+                          'b22892fc-82d9-11e7-ae85-0fea6a3b3757')
+
+        # assert that VIM connector called OpenStack with the expected filter
+        list_port_pair.assert_called_with(
+            id='b22892fc-82d9-11e7-ae85-0fea6a3b3757')
+
+    @mock.patch.object(Client, 'list_port_pair_group')
+    def test_get_sf(self, list_port_pair_group):
+        # what OpenStack is assumed to return to the VIM connector
+        list_port_pair_group.return_value = {'port_pair_groups': [
+            {'port_pairs': ['08fbdbb0-82d6-11e7-ad95-9bb52fbec2f2'],
+             'description': '',
+             'tenant_id': '8f3019ef06374fa880a0144ad4bc1d7b',
+             'port_pair_group_parameters': {},
+             'project_id': '8f3019ef06374fa880a0144ad4bc1d7b',
+             'id': 'aabba8a6-82d9-11e7-a18a-d3c7719b742d',
+             'name': 'osm_sf1'}
+        ]}
+
+        # call the VIM connector
+        result = self.vimconn.get_sf('b22892fc-82d9-11e7-ae85-0fea6a3b3757')
+
+        # assert that VIM connector called OpenStack with the expected filter
+        list_port_pair_group.assert_called_with(
+            id='b22892fc-82d9-11e7-ae85-0fea6a3b3757')
+        # assert that VIM connector successfully returned the OpenStack result
+        self.assertEqual(result,
+                         {'instances': [
+                             '08fbdbb0-82d6-11e7-ad95-9bb52fbec2f2'],
+                          'description': '',
+                          'tenant_id': '8f3019ef06374fa880a0144ad4bc1d7b',
+                          'project_id': '8f3019ef06374fa880a0144ad4bc1d7b',
+                          'id': 'aabba8a6-82d9-11e7-a18a-d3c7719b742d',
+                          'name': 'osm_sf1'})
+
+    @mock.patch.object(Client, 'list_port_pair_group')
+    def test_get_sf_many_results(self, list_port_pair_group):
+        # what OpenStack is assumed to return to the VIM connector
+        list_port_pair_group.return_value = {'port_pair_groups': [
+            {'port_pairs': ['08fbdbb0-82d6-11e7-ad95-9bb52fbec2f2'],
+             'description': '',
+             'tenant_id': '8f3019ef06374fa880a0144ad4bc1d7b',
+             'port_pair_group_parameters': {},
+             'project_id': '8f3019ef06374fa880a0144ad4bc1d7b',
+             'id': 'aabba8a6-82d9-11e7-a18a-d3c7719b742d',
+             'name': 'osm_sf1'},
+            {'port_pairs': ['0d63799c-82d6-11e7-8deb-a746bb3ae9f5'],
+             'description': '',
+             'tenant_id': '8f3019ef06374fa880a0144ad4bc1d7b',
+             'port_pair_group_parameters': {},
+             'project_id': '8f3019ef06374fa880a0144ad4bc1d7b',
+             'id': 'b22892fc-82d9-11e7-ae85-0fea6a3b3757',
+             'name': 'osm_sf2'}
+        ]}
+
+        # call the VIM connector
+        self.assertRaises(vimconn.vimconnConflictException,
+                          self.vimconn.get_sf,
+                          'b22892fc-82d9-11e7-ae85-0fea6a3b3757')
+
+        # assert that VIM connector called OpenStack with the expected filter
+        list_port_pair_group.assert_called_with(
+            id='b22892fc-82d9-11e7-ae85-0fea6a3b3757')
+
+    @mock.patch.object(Client, 'list_port_pair_group')
+    def test_get_sf_no_results(self, list_port_pair_group):
+        # what OpenStack is assumed to return to the VIM connector
+        list_port_pair_group.return_value = {'port_pair_groups': []}
+
+        # call the VIM connector
+        self.assertRaises(vimconn.vimconnNotFoundException,
+                          self.vimconn.get_sf,
+                          'b22892fc-82d9-11e7-ae85-0fea6a3b3757')
+
+        # assert that VIM connector called OpenStack with the expected filter
+        list_port_pair_group.assert_called_with(
+            id='b22892fc-82d9-11e7-ae85-0fea6a3b3757')
+
+    @mock.patch.object(Client, 'list_port_chain')
+    def test_get_sfp(self, list_port_chain):
+        # what OpenStack is assumed to return to the VIM connector
+        list_port_chain.return_value = {'port_chains': [
+            {'port_pair_groups': ['7d8e3bf8-82d6-11e7-a032-8ff028839d25'],
+             'flow_classifiers': ['1333c2f4-82d7-11e7-a5df-9327f33d104e'],
+             'description': '',
+             'tenant_id': '8f3019ef06374fa880a0144ad4bc1d7b',
+             'chain_parameters': {'correlation': 'nsh'},
+             'chain_id': 40,
+             'project_id': '8f3019ef06374fa880a0144ad4bc1d7b',
+             'id': '821bc9be-82d7-11e7-8ce3-23a08a27ab47',
+             'name': 'osm_sfp1'}]}
+
+        # call the VIM connector
+        result = self.vimconn.get_sfp('821bc9be-82d7-11e7-8ce3-23a08a27ab47')
+
+        # assert that VIM connector called OpenStack with the expected filter
+        list_port_chain.assert_called_with(
+            id='821bc9be-82d7-11e7-8ce3-23a08a27ab47')
+        # assert that VIM connector successfully returned the OpenStack result
+        self.assertEqual(result,
+                         {'service_functions': [
+                             '7d8e3bf8-82d6-11e7-a032-8ff028839d25'],
+                          'classifications': [
+                              '1333c2f4-82d7-11e7-a5df-9327f33d104e'],
+                          'description': '',
+                          'tenant_id': '8f3019ef06374fa880a0144ad4bc1d7b',
+                          'project_id': '8f3019ef06374fa880a0144ad4bc1d7b',
+                          'sfc_encap': True,
+                          'spi': 40,
+                          'id': '821bc9be-82d7-11e7-8ce3-23a08a27ab47',
+                          'name': 'osm_sfp1'})
+
+    @mock.patch.object(Client, 'list_port_chain')
+    def test_get_sfp_many_results(self, list_port_chain):
+        # what OpenStack is assumed to return to the VIM connector
+        list_port_chain.return_value = {'port_chains': [
+            {'port_pair_groups': ['7d8e3bf8-82d6-11e7-a032-8ff028839d25'],
+             'flow_classifiers': ['1333c2f4-82d7-11e7-a5df-9327f33d104e'],
+             'description': '',
+             'tenant_id': '8f3019ef06374fa880a0144ad4bc1d7b',
+             'chain_parameters': {'correlation': 'nsh'},
+             'chain_id': 40,
+             'project_id': '8f3019ef06374fa880a0144ad4bc1d7b',
+             'id': '821bc9be-82d7-11e7-8ce3-23a08a27ab47',
+             'name': 'osm_sfp1'},
+            {'port_pair_groups': ['7d8e3bf8-82d6-11e7-a032-8ff028839d25'],
+             'flow_classifiers': ['1333c2f4-82d7-11e7-a5df-9327f33d104e'],
+             'description': '',
+             'tenant_id': '8f3019ef06374fa880a0144ad4bc1d7b',
+             'chain_parameters': {'correlation': 'nsh'},
+             'chain_id': 50,
+             'project_id': '8f3019ef06374fa880a0144ad4bc1d7b',
+             'id': '5d002f38-82de-11e7-a770-f303f11ce66a',
+             'name': 'osm_sfp2'}
+        ]}
+
+        # call the VIM connector
+        self.assertRaises(vimconn.vimconnConflictException,
+                          self.vimconn.get_sfp,
+                          '5d002f38-82de-11e7-a770-f303f11ce66a')
+
+        # assert that VIM connector called OpenStack with the expected filter
+        list_port_chain.assert_called_with(
+            id='5d002f38-82de-11e7-a770-f303f11ce66a')
+
+    @mock.patch.object(Client, 'list_port_chain')
+    def test_get_sfp_no_results(self, list_port_chain):
+        # what OpenStack is assumed to return to the VIM connector
+        list_port_chain.return_value = {'port_chains': []}
+
+        # call the VIM connector
+        self.assertRaises(vimconn.vimconnNotFoundException,
+                          self.vimconn.get_sfp,
+                          '5d002f38-82de-11e7-a770-f303f11ce66a')
+
+        # assert that VIM connector called OpenStack with the expected filter
+        list_port_chain.assert_called_with(
+            id='5d002f38-82de-11e7-a770-f303f11ce66a')
+
+    @mock.patch.object(Client, 'delete_flow_classifier')
+    def test_delete_classification(self, delete_flow_classifier):
+        result = self.vimconn.delete_classification(
+            '638f957c-82df-11e7-b7c8-132706021464')
+        delete_flow_classifier.assert_called_with(
+            '638f957c-82df-11e7-b7c8-132706021464')
+        self.assertEqual(result, '638f957c-82df-11e7-b7c8-132706021464')
+
+    @mock.patch.object(Client, 'delete_port_pair')
+    def test_delete_sfi(self, delete_port_pair):
+        result = self.vimconn.delete_sfi(
+            '638f957c-82df-11e7-b7c8-132706021464')
+        delete_port_pair.assert_called_with(
+            '638f957c-82df-11e7-b7c8-132706021464')
+        self.assertEqual(result, '638f957c-82df-11e7-b7c8-132706021464')
+
+    @mock.patch.object(Client, 'delete_port_pair_group')
+    def test_delete_sf(self, delete_port_pair_group):
+        result = self.vimconn.delete_sf('638f957c-82df-11e7-b7c8-132706021464')
+        delete_port_pair_group.assert_called_with(
+            '638f957c-82df-11e7-b7c8-132706021464')
+        self.assertEqual(result, '638f957c-82df-11e7-b7c8-132706021464')
+
+    @mock.patch.object(Client, 'delete_port_chain')
+    def test_delete_sfp(self, delete_port_chain):
+        result = self.vimconn.delete_sfp(
+            '638f957c-82df-11e7-b7c8-132706021464')
+        delete_port_chain.assert_called_with(
+            '638f957c-82df-11e7-b7c8-132706021464')
+        self.assertEqual(result, '638f957c-82df-11e7-b7c8-132706021464')
+
+
+if __name__ == '__main__':
+    unittest.main()
diff --git a/osm_ro/vimconn_openstack.py b/osm_ro/vimconn_openstack.py
index 319f8c1a..e3d33346 100644
--- a/osm_ro/vimconn_openstack.py
+++ b/osm_ro/vimconn_openstack.py
@@ -22,14 +22,21 @@
 ##
 
 '''
-osconnector implements all the methods to interact with openstack using the python-client.
+osconnector implements all the methods to interact with openstack using the python-neutronclient.
+
+For the VNF forwarding graph, The OpenStack VIM connector calls the
+networking-sfc Neutron extension methods, whose resources are mapped
+to the VIM connector's SFC resources as follows:
+- Classification (OSM) -> Flow Classifier (Neutron)
+- Service Function Instance (OSM) -> Port Pair (Neutron)
+- Service Function (OSM) -> Port Pair Group (Neutron)
+- Service Function Path (OSM) -> Port Chain (Neutron)
 '''
-__author__="Alfonso Tierno, Gerardo Garcia, Pablo Montes, xFlow Research"
-__date__ ="$22-jun-2014 11:19:29$"
+__author__ = "Alfonso Tierno, Gerardo Garcia, Pablo Montes, xFlow Research, Igor D.C."
+__date__  = "$22-sep-2017 23:59:59$"
 
 import vimconn
 import json
-import yaml
 import logging
 import netaddr
 import time
@@ -37,6 +44,7 @@ import yaml
 import random
 import sys
 import re
+import copy
 
 from novaclient import client as nClient, exceptions as nvExceptions
 from keystoneauth1.identity import v2, v3
@@ -67,6 +75,8 @@ vmStatus2manoFormat={'ACTIVE':'ACTIVE',
 netStatus2manoFormat={'ACTIVE':'ACTIVE','PAUSED':'PAUSED','INACTIVE':'INACTIVE','BUILD':'BUILD','ERROR':'ERROR','DELETED':'DELETED'
                      }
 
+supportedClassificationTypes = ['legacy_flow_classifier']
+
 #global var to have a timeout creating and deleting volumes
 volume_timeout = 60
 server_timeout = 300
@@ -96,7 +106,7 @@ class vimconnector(vimconn.vimconnector):
 
         self.insecure = self.config.get("insecure", False)
         if not url:
-            raise TypeError, 'url param can not be NoneType'
+            raise TypeError('url param can not be NoneType')
         self.persistent_info = persistent_info
         self.availability_zone = persistent_info.get('availability_zone', None)
         self.session = persistent_info.get('session', {'reload_client': True})
@@ -218,13 +228,117 @@ class vimconnector(vimconn.vimconnector):
             else:
                 net['type']='bridge'
 
+    def __classification_os2mano(self, class_list_dict):
+        """Transform the openstack format (Flow Classifier) to mano format
+        (Classification) class_list_dict can be a list of dict or a single dict
+        """
+        if isinstance(class_list_dict, dict):
+            class_list_ = [class_list_dict]
+        elif isinstance(class_list_dict, list):
+            class_list_ = class_list_dict
+        else:
+            raise TypeError(
+                "param class_list_dict must be a list or a dictionary")
+        for classification in class_list_:
+            id = classification.pop('id')
+            name = classification.pop('name')
+            description = classification.pop('description')
+            project_id = classification.pop('project_id')
+            tenant_id = classification.pop('tenant_id')
+            original_classification = copy.deepcopy(classification)
+            classification.clear()
+            classification['ctype'] = 'legacy_flow_classifier'
+            classification['definition'] = original_classification
+            classification['id'] = id
+            classification['name'] = name
+            classification['description'] = description
+            classification['project_id'] = project_id
+            classification['tenant_id'] = tenant_id
+
+    def __sfi_os2mano(self, sfi_list_dict):
+        """Transform the openstack format (Port Pair) to mano format (SFI)
+        sfi_list_dict can be a list of dict or a single dict
+        """
+        if isinstance(sfi_list_dict, dict):
+            sfi_list_ = [sfi_list_dict]
+        elif isinstance(sfi_list_dict, list):
+            sfi_list_ = sfi_list_dict
+        else:
+            raise TypeError(
+                "param sfi_list_dict must be a list or a dictionary")
+        for sfi in sfi_list_:
+            sfi['ingress_ports'] = []
+            sfi['egress_ports'] = []
+            if sfi.get('ingress'):
+                sfi['ingress_ports'].append(sfi['ingress'])
+            if sfi.get('egress'):
+                sfi['egress_ports'].append(sfi['egress'])
+            del sfi['ingress']
+            del sfi['egress']
+            params = sfi.get('service_function_parameters')
+            sfc_encap = False
+            if params:
+                correlation = params.get('correlation')
+                if correlation:
+                    sfc_encap = True
+            sfi['sfc_encap'] = sfc_encap
+            del sfi['service_function_parameters']
+
+    def __sf_os2mano(self, sf_list_dict):
+        """Transform the openstack format (Port Pair Group) to mano format (SF)
+        sf_list_dict can be a list of dict or a single dict
+        """
+        if isinstance(sf_list_dict, dict):
+            sf_list_ = [sf_list_dict]
+        elif isinstance(sf_list_dict, list):
+            sf_list_ = sf_list_dict
+        else:
+            raise TypeError(
+                "param sf_list_dict must be a list or a dictionary")
+        for sf in sf_list_:
+            del sf['port_pair_group_parameters']
+            sf['sfis'] = sf['port_pairs']
+            del sf['port_pairs']
+
+    def __sfp_os2mano(self, sfp_list_dict):
+        """Transform the openstack format (Port Chain) to mano format (SFP)
+        sfp_list_dict can be a list of dict or a single dict
+        """
+        if isinstance(sfp_list_dict, dict):
+            sfp_list_ = [sfp_list_dict]
+        elif isinstance(sfp_list_dict, list):
+            sfp_list_ = sfp_list_dict
+        else:
+            raise TypeError(
+                "param sfp_list_dict must be a list or a dictionary")
+        for sfp in sfp_list_:
+            params = sfp.pop('chain_parameters')
+            sfc_encap = False
+            if params:
+                correlation = params.get('correlation')
+                if correlation:
+                    sfc_encap = True
+            sfp['sfc_encap'] = sfc_encap
+            sfp['spi'] = sfp.pop('chain_id')
+            sfp['classifications'] = sfp.pop('flow_classifiers')
+            sfp['service_functions'] = sfp.pop('port_pair_groups')
+
+    # placeholder for now; read TODO note below
+    def _validate_classification(self, type, definition):
+        # only legacy_flow_classifier Type is supported at this point
+        return True
+        # TODO(igordcard): this method should be an abstract method of an
+        # abstract Classification class to be implemented by the specific
+        # Types. Also, abstract vimconnector should call the validation
+        # method before the implemented VIM connectors are called.
+
     def _format_exception(self, exception):
         '''Transform a keystone, nova, neutron  exception into a vimconn exception'''
         if isinstance(exception, (HTTPException, gl1Exceptions.HTTPException, gl1Exceptions.CommunicationError,
                                   ConnectionError, ksExceptions.ConnectionError, neExceptions.ConnectionFailed
                                   )):
-            raise vimconn.vimconnConnectionException(type(exception).__name__ + ": " + str(exception))            
-        elif isinstance(exception, (nvExceptions.ClientException, ksExceptions.ClientException, 
+            raise vimconn.vimconnConnectionException(type(exception).__name__ + ": " + str(exception))
+        elif isinstance(exception, (nvExceptions.ClientException, ksExceptions.ClientException,
                                     neExceptions.NeutronException, nvExceptions.BadRequest)):
             raise vimconn.vimconnUnexpectedResponse(type(exception).__name__ + ": " + str(exception))
         elif isinstance(exception, (neExceptions.NetworkNotFoundClient, nvExceptions.NotFound)):
@@ -326,7 +440,7 @@ class vimconnector(vimconn.vimconnector):
                 #Fake subnet is required
                 subnet_rand = random.randint(0, 255)
                 ip_profile['subnet_address'] = "192.168.{}.0/24".format(subnet_rand)
-            if 'ip_version' not in ip_profile: 
+            if 'ip_version' not in ip_profile:
                 ip_profile['ip_version'] = "IPv4"
             subnet = {"name":net_name+"-subnet",
                     "network_id": new_net["network"]["id"],
@@ -439,7 +553,7 @@ class vimconnector(vimconn.vimconnector):
                     error_msg:  #Text with VIM error message, if any. Or the VIM connection ERROR 
                     vim_info:   #Text with plain information obtained from vim (yaml.safe_dump)
 
-        '''        
+        '''
         net_dict={}
         for net_id in net_list:
             net = {}
@@ -450,7 +564,7 @@ class vimconnector(vimconn.vimconnector):
                 else:
                     net["status"] = "OTHER"
                     net["error_msg"] = "VIM status reported " + net_vim['status']
-                    
+
                 if net['status'] == "ACTIVE" and not net_vim['admin_state_up']:
                     net['status'] = 'DOWN'
                 try:
@@ -587,11 +701,11 @@ class vimconnector(vimconn.vimconnector):
                             #     if interface["dedicated"]=="yes":
                             #         raise vimconn.vimconnException("Passthrough interfaces are not supported for the openstack connector", http_code=vimconn.HTTP_Service_Unavailable)
                             #     #TODO, add the key 'pci_passthrough:alias"="<label at config>:<number ifaces>"' when a way to connect it is available
-                                
+
                 #create flavor                 
-                new_flavor=self.nova.flavors.create(name, 
-                                ram, 
-                                vcpus, 
+                new_flavor=self.nova.flavors.create(name,
+                                ram,
+                                vcpus,
                                 flavor_data.get('disk',1),
                                 is_public=flavor_data.get('is_public', True)
                             )
@@ -682,7 +796,7 @@ class vimconnector(vimconn.vimconnector):
             except IOError as e:  #can not open the file
                 raise vimconn.vimconnConnectionException(type(e).__name__ + ": " + str(e)+ " for " + image_dict['location'],
                                                          http_code=vimconn.HTTP_Bad_Request)
-     
+
     def delete_image(self, image_id):
         '''Deletes a tenant image from openstack VIM. Returns the old id
         '''
@@ -694,7 +808,7 @@ class vimconnector(vimconn.vimconnector):
             self._format_exception(e)
 
     def get_image_id_from_path(self, path):
-        '''Get the image id from image path in the VIM database. Returns the image_id''' 
+        '''Get the image id from image path in the VIM database. Returns the image_id'''
         try:
             self._reload_connection()
             images = self.nova.images.list()
@@ -704,7 +818,7 @@ class vimconnector(vimconn.vimconnector):
             raise vimconn.vimconnNotFoundException("image with location '{}' not found".format( path))
         except (ksExceptions.ClientException, nvExceptions.ClientException, gl1Exceptions.CommunicationError, ConnectionError) as e:
             self._format_exception(e)
-        
+
     def get_image_list(self, filter_dict={}):
         '''Obtain tenant images from VIM
         Filter_dict can be:
@@ -969,10 +1083,10 @@ class vimconnector(vimconn.vimconnector):
                     #metadata["pci_assignement"] = metadata["pci_assignement"][0:255]
                     self.logger.warn("Metadata deleted since it exceeds the expected length (255) ")
                     metadata = {}
-            
+
             self.logger.debug("name '%s' image_id '%s'flavor_id '%s' net_list_vim '%s' description '%s' metadata %s",
                               name, image_id, flavor_id, str(net_list_vim), description, str(metadata))
-            
+
             security_groups   = self.config.get('security_groups')
             if type(security_groups) is str:
                 security_groups = ( security_groups, )
@@ -1216,7 +1330,7 @@ class vimconnector(vimconn.vimconnector):
                 console_dict = server.get_spice_console(console_type)
             else:
                 raise vimconn.vimconnException("console type '{}' not allowed".format(console_type), http_code=vimconn.HTTP_Bad_Request)
-            
+
             console_dict1 = console_dict.get("console")
             if console_dict1:
                 console_url = console_dict1.get("url")
@@ -1228,14 +1342,14 @@ class vimconnector(vimconn.vimconnector):
                     if protocol_index < 0 or port_index<0 or suffix_index<0:
                         return -vimconn.HTTP_Internal_Server_Error, "Unexpected response from VIM"
                     console_dict={"protocol": console_url[0:protocol_index],
-                                  "server":   console_url[protocol_index+2:port_index], 
-                                  "port":     console_url[port_index:suffix_index], 
-                                  "suffix":   console_url[suffix_index+1:] 
+                                  "server":   console_url[protocol_index+2:port_index],
+                                  "port":     console_url[port_index:suffix_index],
+                                  "suffix":   console_url[suffix_index+1:]
                                   }
                     protocol_index += 2
                     return console_dict
             raise vimconn.vimconnUnexpectedResponse("Unexpected response from VIM")
-            
+
         except (nvExceptions.NotFound, ksExceptions.ClientException, nvExceptions.ClientException, nvExceptions.BadRequest, ConnectionError) as e:
             self._format_exception(e)
 
@@ -1385,7 +1499,7 @@ class vimconnector(vimconn.vimconnector):
                 vm['error_msg'] = str(e)
             vm_dict[vm_id] = vm
         return vm_dict
-    
+
     def action_vminstance(self, vm_id, action_dict):
         '''Send and action over a VM instance from VIM
         Returns the vm_id if the action was successfully sent to the VIM'''
@@ -1394,7 +1508,7 @@ class vimconnector(vimconn.vimconnector):
             self._reload_connection()
             server = self.nova.servers.find(id=vm_id)
             if "start" in action_dict:
-                if action_dict["start"]=="rebuild":  
+                if action_dict["start"]=="rebuild":
                     server.rebuild()
                 else:
                     if server.status=="PAUSED":
@@ -1436,7 +1550,7 @@ class vimconnector(vimconn.vimconnector):
                 elif console_type == "spice-html5":
                     console_dict = server.get_spice_console(console_type)
                 else:
-                    raise vimconn.vimconnException("console type '{}' not allowed".format(console_type), 
+                    raise vimconn.vimconnException("console type '{}' not allowed".format(console_type),
                                                    http_code=vimconn.HTTP_Bad_Request)
                 try:
                     console_url = console_dict["console"]["url"]
@@ -1447,14 +1561,14 @@ class vimconnector(vimconn.vimconnector):
                     if protocol_index < 0 or port_index<0 or suffix_index<0:
                         raise vimconn.vimconnException("Unexpected response from VIM " + str(console_dict))
                     console_dict2={"protocol": console_url[0:protocol_index],
-                                  "server":   console_url[protocol_index+2 : port_index], 
-                                  "port":     int(console_url[port_index+1 : suffix_index]), 
-                                  "suffix":   console_url[suffix_index+1:] 
+                                  "server":   console_url[protocol_index+2 : port_index],
+                                  "port":     int(console_url[port_index+1 : suffix_index]),
+                                  "suffix":   console_url[suffix_index+1:]
                                   }
-                    return console_dict2               
+                    return console_dict2
                 except Exception as e:
                     raise vimconn.vimconnException("Unexpected response from VIM " + str(console_dict))
-            
+
             return vm_id
         except (ksExceptions.ClientException, nvExceptions.ClientException, nvExceptions.NotFound, ConnectionError) as e:
             self._format_exception(e)
@@ -1522,19 +1636,19 @@ class vimconnector(vimconn.vimconnector):
                     "start_ID < end_ID ".format(vlanID_range))
 
 #NOT USED FUNCTIONS
-    
+
     def new_external_port(self, port_data):
         #TODO openstack if needed
         '''Adds a external port to VIM'''
         '''Returns the port identifier'''
-        return -vimconn.HTTP_Internal_Server_Error, "osconnector.new_external_port() not implemented" 
-        
+        return -vimconn.HTTP_Internal_Server_Error, "osconnector.new_external_port() not implemented"
+
     def connect_port_network(self, port_id, network_id, admin=False):
         #TODO openstack if needed
         '''Connects a external port to a network'''
         '''Returns status code of the VIM response'''
-        return -vimconn.HTTP_Internal_Server_Error, "osconnector.connect_port_network() not implemented" 
-    
+        return -vimconn.HTTP_Internal_Server_Error, "osconnector.connect_port_network() not implemented"
+
     def new_user(self, user_name, user_passwd, tenant_id=None):
         '''Adds a new user to openstack VIM'''
         '''Returns the user identifier'''
@@ -1554,13 +1668,13 @@ class vimconnector(vimconn.vimconnector):
         #if reaching here is because an exception
         if self.debug:
             self.logger.debug("new_user " + error_text)
-        return error_value, error_text        
+        return error_value, error_text
 
     def delete_user(self, user_id):
         '''Delete a user from openstack VIM'''
         '''Returns the user identifier'''
         if self.debug:
-            print "osconnector: Deleting  a  user from VIM"
+            print("osconnector: Deleting  a  user from VIM")
         try:
             self._reload_connection()
             self.keystone.users.delete(user_id)
@@ -1577,14 +1691,14 @@ class vimconnector(vimconn.vimconnector):
         #TODO insert exception vimconn.HTTP_Unauthorized
         #if reaching here is because an exception
         if self.debug:
-            print "delete_tenant " + error_text
+            print("delete_tenant " + error_text)
         return error_value, error_text
- 
+
     def get_hosts_info(self):
         '''Get the information of deployed hosts
         Returns the hosts content'''
         if self.debug:
-            print "osconnector: Getting Host info from VIM"
+            print("osconnector: Getting Host info from VIM")
         try:
             h_list=[]
             self._reload_connection()
@@ -1601,8 +1715,8 @@ class vimconnector(vimconn.vimconnector):
         #TODO insert exception vimconn.HTTP_Unauthorized
         #if reaching here is because an exception
         if self.debug:
-            print "get_hosts_info " + error_text
-        return error_value, error_text        
+            print("get_hosts_info " + error_text)
+        return error_value, error_text
 
     def get_hosts(self, vim_tenant):
         '''Get the hosts and deployed instances
@@ -1630,8 +1744,297 @@ class vimconnector(vimconn.vimconnector):
         #TODO insert exception vimconn.HTTP_Unauthorized
         #if reaching here is because an exception
         if self.debug:
-            print "get_hosts " + error_text
-        return error_value, error_text        
-  
+            print("get_hosts " + error_text)
+        return error_value, error_text
 
+    def new_classification(self, name, ctype, definition):
+        self.logger.debug(
+            'Adding a new (Traffic) Classification to VIM, named %s', name)
+        try:
+            new_class = None
+            self._reload_connection()
+            if ctype not in supportedClassificationTypes:
+                raise vimconn.vimconnNotSupportedException(
+                        'OpenStack VIM connector doesn\'t support provided '
+                        'Classification Type {}, supported ones are: '
+                        '{}'.format(ctype, supportedClassificationTypes))
+            if not self._validate_classification(ctype, definition):
+                raise vimconn.vimconnException(
+                    'Incorrect Classification definition '
+                    'for the type specified.')
+            classification_dict = definition
+            classification_dict['name'] = name
+
+            new_class = self.neutron.create_flow_classifier(
+                {'flow_classifier': classification_dict})
+            return new_class['flow_classifier']['id']
+        except (neExceptions.ConnectionFailed, ksExceptions.ClientException,
+                neExceptions.NeutronException, ConnectionError) as e:
+            self.logger.error(
+                'Creation of Classification failed.')
+            self._format_exception(e)
+
+    def get_classification(self, class_id):
+        self.logger.debug(" Getting Classification %s from VIM", class_id)
+        filter_dict = {"id": class_id}
+        class_list = self.get_classification_list(filter_dict)
+        if len(class_list) == 0:
+            raise vimconn.vimconnNotFoundException(
+                "Classification '{}' not found".format(class_id))
+        elif len(class_list) > 1:
+            raise vimconn.vimconnConflictException(
+                "Found more than one Classification with this criteria")
+        classification = class_list[0]
+        return classification
+
+    def get_classification_list(self, filter_dict={}):
+        self.logger.debug("Getting Classifications from VIM filter: '%s'",
+                          str(filter_dict))
+        try:
+            self._reload_connection()
+            if self.api_version3 and "tenant_id" in filter_dict:
+                filter_dict['project_id'] = filter_dict.pop('tenant_id')
+            classification_dict = self.neutron.list_flow_classifier(
+                **filter_dict)
+            classification_list = classification_dict["flow_classifiers"]
+            self.__classification_os2mano(classification_list)
+            return classification_list
+        except (neExceptions.ConnectionFailed, ksExceptions.ClientException,
+                neExceptions.NeutronException, ConnectionError) as e:
+            self._format_exception(e)
+
+    def delete_classification(self, class_id):
+        self.logger.debug("Deleting Classification '%s' from VIM", class_id)
+        try:
+            self._reload_connection()
+            self.neutron.delete_flow_classifier(class_id)
+            return class_id
+        except (neExceptions.ConnectionFailed, neExceptions.NeutronException,
+                ksExceptions.ClientException, neExceptions.NeutronException,
+                ConnectionError) as e:
+            self._format_exception(e)
 
+    def new_sfi(self, name, ingress_ports, egress_ports, sfc_encap=True):
+        self.logger.debug(
+            "Adding a new Service Function Instance to VIM, named '%s'", name)
+        try:
+            new_sfi = None
+            self._reload_connection()
+            correlation = None
+            if sfc_encap:
+                # TODO(igordc): must be changed to NSH in Queens
+                # (MPLS is a workaround)
+                correlation = 'mpls'
+            if len(ingress_ports) != 1:
+                raise vimconn.vimconnNotSupportedException(
+                    "OpenStack VIM connector can only have "
+                    "1 ingress port per SFI")
+            if len(egress_ports) != 1:
+                raise vimconn.vimconnNotSupportedException(
+                    "OpenStack VIM connector can only have "
+                    "1 egress port per SFI")
+            sfi_dict = {'name': name,
+                        'ingress': ingress_ports[0],
+                        'egress': egress_ports[0],
+                        'service_function_parameters': {
+                            'correlation': correlation}}
+            new_sfi = self.neutron.create_port_pair({'port_pair': sfi_dict})
+            return new_sfi['port_pair']['id']
+        except (neExceptions.ConnectionFailed, ksExceptions.ClientException,
+                neExceptions.NeutronException, ConnectionError) as e:
+            if new_sfi:
+                try:
+                    self.neutron.delete_port_pair_group(
+                        new_sfi['port_pair']['id'])
+                except Exception:
+                    self.logger.error(
+                        'Creation of Service Function Instance failed, with '
+                        'subsequent deletion failure as well.')
+            self._format_exception(e)
+
+    def get_sfi(self, sfi_id):
+        self.logger.debug(
+            'Getting Service Function Instance %s from VIM', sfi_id)
+        filter_dict = {"id": sfi_id}
+        sfi_list = self.get_sfi_list(filter_dict)
+        if len(sfi_list) == 0:
+            raise vimconn.vimconnNotFoundException(
+                "Service Function Instance '{}' not found".format(sfi_id))
+        elif len(sfi_list) > 1:
+            raise vimconn.vimconnConflictException(
+                'Found more than one Service Function Instance '
+                'with this criteria')
+        sfi = sfi_list[0]
+        return sfi
+
+    def get_sfi_list(self, filter_dict={}):
+        self.logger.debug("Getting Service Function Instances from "
+                          "VIM filter: '%s'", str(filter_dict))
+        try:
+            self._reload_connection()
+            if self.api_version3 and "tenant_id" in filter_dict:
+                filter_dict['project_id'] = filter_dict.pop('tenant_id')
+            sfi_dict = self.neutron.list_port_pair(**filter_dict)
+            sfi_list = sfi_dict["port_pairs"]
+            self.__sfi_os2mano(sfi_list)
+            return sfi_list
+        except (neExceptions.ConnectionFailed, ksExceptions.ClientException,
+                neExceptions.NeutronException, ConnectionError) as e:
+            self._format_exception(e)
+
+    def delete_sfi(self, sfi_id):
+        self.logger.debug("Deleting Service Function Instance '%s' "
+                          "from VIM", sfi_id)
+        try:
+            self._reload_connection()
+            self.neutron.delete_port_pair(sfi_id)
+            return sfi_id
+        except (neExceptions.ConnectionFailed, neExceptions.NeutronException,
+                ksExceptions.ClientException, neExceptions.NeutronException,
+                ConnectionError) as e:
+            self._format_exception(e)
+
+    def new_sf(self, name, sfis, sfc_encap=True):
+        self.logger.debug("Adding a new Service Function to VIM, "
+                          "named '%s'", name)
+        try:
+            new_sf = None
+            self._reload_connection()
+            correlation = None
+            if sfc_encap:
+                # TODO(igordc): must be changed to NSH in Queens
+                # (MPLS is a workaround)
+                correlation = 'mpls'
+            for instance in sfis:
+                sfi = self.get_sfi(instance)
+                if sfi.get('sfc_encap') != correlation:
+                    raise vimconn.vimconnNotSupportedException(
+                        "OpenStack VIM connector requires all SFIs of the "
+                        "same SF to share the same SFC Encapsulation")
+            sf_dict = {'name': name,
+                       'port_pairs': sfis}
+            new_sf = self.neutron.create_port_pair_group({
+                'port_pair_group': sf_dict})
+            return new_sf['port_pair_group']['id']
+        except (neExceptions.ConnectionFailed, ksExceptions.ClientException,
+                neExceptions.NeutronException, ConnectionError) as e:
+            if new_sf:
+                try:
+                    self.neutron.delete_port_pair_group(
+                        new_sf['port_pair_group']['id'])
+                except Exception:
+                    self.logger.error(
+                        'Creation of Service Function failed, with '
+                        'subsequent deletion failure as well.')
+            self._format_exception(e)
+
+    def get_sf(self, sf_id):
+        self.logger.debug("Getting Service Function %s from VIM", sf_id)
+        filter_dict = {"id": sf_id}
+        sf_list = self.get_sf_list(filter_dict)
+        if len(sf_list) == 0:
+            raise vimconn.vimconnNotFoundException(
+                "Service Function '{}' not found".format(sf_id))
+        elif len(sf_list) > 1:
+            raise vimconn.vimconnConflictException(
+                "Found more than one Service Function with this criteria")
+        sf = sf_list[0]
+        return sf
+
+    def get_sf_list(self, filter_dict={}):
+        self.logger.debug("Getting Service Function from VIM filter: '%s'",
+                          str(filter_dict))
+        try:
+            self._reload_connection()
+            if self.api_version3 and "tenant_id" in filter_dict:
+                filter_dict['project_id'] = filter_dict.pop('tenant_id')
+            sf_dict = self.neutron.list_port_pair_group(**filter_dict)
+            sf_list = sf_dict["port_pair_groups"]
+            self.__sf_os2mano(sf_list)
+            return sf_list
+        except (neExceptions.ConnectionFailed, ksExceptions.ClientException,
+                neExceptions.NeutronException, ConnectionError) as e:
+            self._format_exception(e)
+
+    def delete_sf(self, sf_id):
+        self.logger.debug("Deleting Service Function '%s' from VIM", sf_id)
+        try:
+            self._reload_connection()
+            self.neutron.delete_port_pair_group(sf_id)
+            return sf_id
+        except (neExceptions.ConnectionFailed, neExceptions.NeutronException,
+                ksExceptions.ClientException, neExceptions.NeutronException,
+                ConnectionError) as e:
+            self._format_exception(e)
+
+    def new_sfp(self, name, classifications, sfs, sfc_encap=True, spi=None):
+        self.logger.debug("Adding a new Service Function Path to VIM, "
+                          "named '%s'", name)
+        try:
+            new_sfp = None
+            self._reload_connection()
+            if not sfc_encap:
+                raise vimconn.vimconnNotSupportedException(
+                    "OpenStack VIM connector only supports "
+                    "SFC-Encapsulated chains")
+            # TODO(igordc): must be changed to NSH in Queens
+            # (MPLS is a workaround)
+            correlation = 'mpls'
+            sfp_dict = {'name': name,
+                        'flow_classifiers': classifications,
+                        'port_pair_groups': sfs,
+                        'chain_parameters': {'correlation': correlation}}
+            if spi:
+                sfp_dict['chain_id'] = spi
+            new_sfp = self.neutron.create_port_chain({'port_chain': sfp_dict})
+            return new_sfp["port_chain"]["id"]
+        except (neExceptions.ConnectionFailed, ksExceptions.ClientException,
+                neExceptions.NeutronException, ConnectionError) as e:
+            if new_sfp:
+                try:
+                    self.neutron.delete_port_chain(new_sfp['port_chain']['id'])
+                except Exception:
+                    self.logger.error(
+                        'Creation of Service Function Path failed, with '
+                        'subsequent deletion failure as well.')
+            self._format_exception(e)
+
+    def get_sfp(self, sfp_id):
+        self.logger.debug(" Getting Service Function Path %s from VIM", sfp_id)
+        filter_dict = {"id": sfp_id}
+        sfp_list = self.get_sfp_list(filter_dict)
+        if len(sfp_list) == 0:
+            raise vimconn.vimconnNotFoundException(
+                "Service Function Path '{}' not found".format(sfp_id))
+        elif len(sfp_list) > 1:
+            raise vimconn.vimconnConflictException(
+                "Found more than one Service Function Path with this criteria")
+        sfp = sfp_list[0]
+        return sfp
+
+    def get_sfp_list(self, filter_dict={}):
+        self.logger.debug("Getting Service Function Paths from VIM filter: "
+                          "'%s'", str(filter_dict))
+        try:
+            self._reload_connection()
+            if self.api_version3 and "tenant_id" in filter_dict:
+                filter_dict['project_id'] = filter_dict.pop('tenant_id')
+            sfp_dict = self.neutron.list_port_chain(**filter_dict)
+            sfp_list = sfp_dict["port_chains"]
+            self.__sfp_os2mano(sfp_list)
+            return sfp_list
+        except (neExceptions.ConnectionFailed, ksExceptions.ClientException,
+                neExceptions.NeutronException, ConnectionError) as e:
+            self._format_exception(e)
+
+    def delete_sfp(self, sfp_id):
+        self.logger.debug(
+            "Deleting Service Function Path '%s' from VIM", sfp_id)
+        try:
+            self._reload_connection()
+            self.neutron.delete_port_chain(sfp_id)
+            return sfp_id
+        except (neExceptions.ConnectionFailed, neExceptions.NeutronException,
+                ksExceptions.ClientException, neExceptions.NeutronException,
+                ConnectionError) as e:
+            self._format_exception(e)