diff --git a/netconf/security/client_credentials/client_keys b/netconf/security/client_credentials/client_keys
index c2d9c96..ceff017 100644
--- a/netconf/security/client_credentials/client_keys
+++ b/netconf/security/client_credentials/client_keys
@@ -1,3 +1,3 @@
-vagrant:id_rsa
-voltha:id_rsa
-user:id_rsa
\ No newline at end of file
+vagrant:id_rsa.pub
+voltha:id_rsa.pub
+user:id_rsa.pub
\ No newline at end of file
diff --git a/netconf/security/client_credentials/id_rsa b/netconf/security/client_credentials/id_rsa
index 935df1f..a1260c9 100644
--- a/netconf/security/client_credentials/id_rsa
+++ b/netconf/security/client_credentials/id_rsa
@@ -1,27 +1,27 @@
 -----BEGIN RSA PRIVATE KEY-----
-MIIEogIBAAKCAQEAwc4vhwcIUr+vPOlA0e52QepFcTieYt1lln17qOtQ8lw/Fg4e
-7UEo3huCJZWZKQ49tA5nCrGeCprPHNqZeLbbL8qBM9JbCnj/cZ0Z3vOXEXoYJGwM
-PklAEp3q9Wt5jN0aL71BPjTDFr5chLTC52MWtxlfJwYsF5sKnLvRQabDTT7Bfdvj
-PgYBcwZ7c5bp00wdc4xAZLd7nMCWFadO10p+EGfg3DvqJkgoA9WN5u7wHLZlG38a
-Ai1cls8UrsiwWie62CcOAEPZmvo1GEAb8+K06DsW6A1DBlMv80DCebvBg8XLYJh/
-22eAiVxNcJWpEecp6LkqD4V/4rgfONSuOeN7DwIDAQABAoIBAFKArrThpoZreXMJ
-rQFxbUBUNamkO7DEpSlyU8EuI7B42pZN/pZrhbU/qqDLVX8nw9axxuXDhQ7opkCX
-QnwkA50NrQDdjMohhkTcZxYFRos3Ga3vnSqqzi7esRY24XC48xvdijesCFzXPtVz
-igEsqo/ZqisXso99/f+I6OT00/E+hzDCPXn0VzWhNE5g2oDd6OMcn4y5SQ/OQfDl
-bx0sA2H+3bJCkGYAwt/ebMYxStNYx7eJFggq06O+aCKoilrI9U/kkN++qbjkp+p1
-p7FrKypHXuFRuerXOCFs8o9gotT/VEuEZKYfbjMe4442LXmm1lx2wlMtNJ0y9Fbt
-4wiUoJECgYEA5Uo3X7/V1nzHH5+O8odOz7XKyyWAAQHcCyM+CKYL5r+K6GVzVu1S
-pYKKWCWgP7d9HnOGa3GLNQSSjQYaZb4A2p/RTAtPA1EZVuCYfJubwWJQGobhY43m
-FdaBhb507c5EmgTBmCNcNsT+1wAcwSS7ODthYYd1oaYglifvoIB+gwkCgYEA2GHE
-JnJqxez8M1H6lFGAG/PJyKAr35E35kO+U3bjisple+1Aev4mG1WA3XVZI+oyNb3w
-wgGqBSf6e4S92DXYpAlM1zupUI2X7hvt0S3EJt4fGDtAMgx/UQidP+dIYo3yFPhB
-dG/IX8ZtyiaSU4QfWGiKXPZcfUCWYiuRMeQ7G1cCgYB5ifyOOY6tEhkuzxIjxstk
-2LU1N5yBbC3qjXTNes7mMnP8OgKIemYLq4WPseoevDGLWatP+rDSmqjgLfMCKVQk
-jwCPcZMha/Slk4ngy08lk+poFUUV01q6Cqk/brRmdabxiUHhViUENynqZ3nWe5Tt
-+rPk0bvtwrSVQ3gGuPXWmQKBgFCN5QYjJljU5vb8F/tLdBPz6DUGXA748wSIR7yu
-z/sFak5+frjLEMiwRi8r1qmmMFcNhSnUkMUmovuE6WAqe6Jly/N8xIW2kM8WGqz7
-CsElhBHzTOzU9jjmqhP2OF5oVa001rlQPBpbttfBEEyDLWAuWwRMuxXuC440hfM6
-8j41AoGASAnCEYRsvWp47YEUCSX/7m1hM6/dm+OQo53w4GtNEgr3iTdSWWTkBilw
-RCvFikM/qW7PMl1/RGs2vX2Ur/0+tFweF1dJ+OJDlio26hD3BpRPPNxpmwEIHoF9
-zZBWjfarNsxkK4AYx9bNifhtEJuaqm1duTYG/OSc9tEJVjoU/bk=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 -----END RSA PRIVATE KEY-----
diff --git a/netconf/security/client_credentials/id_rsa.pub b/netconf/security/client_credentials/id_rsa.pub
index ef0da9f..e744803 100644
--- a/netconf/security/client_credentials/id_rsa.pub
+++ b/netconf/security/client_credentials/id_rsa.pub
@@ -1 +1 @@
-ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDBzi+HBwhSv6886UDR7nZB6kVxOJ5i3WWWfXuo61DyXD8WDh7tQSjeG4IllZkpDj20DmcKsZ4Kms8c2pl4ttsvyoEz0lsKeP9xnRne85cRehgkbAw+SUASner1a3mM3RovvUE+NMMWvlyEtMLnYxa3GV8nBiwXmwqcu9FBpsNNPsF92+M+BgFzBntzlunTTB1zjEBkt3ucwJYVp07XSn4QZ+DcO+omSCgD1Y3m7vActmUbfxoCLVyWzxSuyLBaJ7rYJw4AQ9ma+jUYQBvz4rToOxboDUMGUy/zQMJ5u8GDxctgmH/bZ4CJXE1wlakR5ynouSoPhX/iuB841K4543sP vagrant@voltha
+ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQC0Ix05mz647U81wNYl2uPPm0+Waoemr1QK/RxGuizXgC+mcxH924aVuQl61hf9cX+P6BYk8zN9tNdO+QHwbdxf7qjJHXzILdq3slAihNHuiYo+W++sDgeLErfFTyFOCbJVcuneF6ow7pFvF/UzwDijTa+par0S7fTZ2RkO+No17itXLOFPBaGOgTgSproEydR7xuur9ikD688ADx0hUXHKLO8TGfpvnK4WwZC5u247LVgO6kPMRD2BHihWUnwWebHNWpyz5Y9U1l8Y3Re96oMhYGI3ID5ZGS2AYaTVBL+Bfq+UrzWQRu1eAWbaI3XHhSSgNEw+l1yEM3mI4OMRfYgX knursimu@ONM-KNURSIMU-01
diff --git a/netconf/session/nc_protocol_handler.py b/netconf/session/nc_protocol_handler.py
index 79cfb06..7062250 100644
--- a/netconf/session/nc_protocol_handler.py
+++ b/netconf/session/nc_protocol_handler.py
@@ -23,7 +23,7 @@
 from netconf.constants import Constants as C
 from netconf.nc_common.utils import qmap, ns, elm
 import netconf.nc_common.error as ncerror
-from netconf.nc_common.error import BadMsg, NotImpl, ServerException, Error
+from netconf.nc_rpc.rpc_response import RpcResponse
 
 log = structlog.get_logger()
 
@@ -181,6 +181,7 @@
                              response=response)
                     if not response.is_error:
                         self.send_rpc_reply(response.node, rpc)
+                        # self.send_rpc_reply(self.get_mock_volthainstance(), rpc)
                     else:
                         self.send_message(response.node.get_xml_reply())
 
@@ -235,371 +236,142 @@
             self.connected.callback(None)
             log.info('closing-client')
 
+
     # Example of a properly formatted Yang-XML message
-    def get_instance(self):
-        xml_string = """
-            <data>
-             <Voltha xmlns="urn:opencord:params:xml:ns:voltha:ietf-voltha">
-             <instances>
-              <log_level>INFO</log_level>
-                <device_types>
-                  <adapter>simulated_onu</adapter>
-                  <accepts_bulk_flow_update>True</accepts_bulk_flow_update>
-                  <id>simulated_onu</id>
-                  <accepts_add_remove_flow_updates>False</accepts_add_remove_flow_updates>
-                </device_types>
-                <device_types>
-                  <adapter>tibit_onu</adapter>
-                  <accepts_bulk_flow_update>True</accepts_bulk_flow_update>
-                  <id>tibit_onu</id>
-                  <accepts_add_remove_flow_updates>False</accepts_add_remove_flow_updates>
-                </device_types>
-                <device_types>
-                  <adapter>maple_olt</adapter>
-                  <accepts_bulk_flow_update>True</accepts_bulk_flow_update>
-                  <id>maple_olt</id>
-                  <accepts_add_remove_flow_updates>False</accepts_add_remove_flow_updates>
-                </device_types>
-                <device_types>
-                  <adapter>tibit_olt</adapter>
-                  <accepts_bulk_flow_update>True</accepts_bulk_flow_update>
-                  <id>tibit_olt</id>
-                  <accepts_add_remove_flow_updates>False</accepts_add_remove_flow_updates>
-                </device_types>
-                <device_types>
-                  <adapter>broadcom_onu</adapter>
-                  <accepts_bulk_flow_update>True</accepts_bulk_flow_update>
-                  <id>broadcom_onu</id>
-                  <accepts_add_remove_flow_updates>False</accepts_add_remove_flow_updates>
-                </device_types>
-                <device_types>
-                  <adapter>simulated_olt</adapter>
-                  <accepts_bulk_flow_update>True</accepts_bulk_flow_update>
-                  <id>simulated_olt</id>
-                  <accepts_add_remove_flow_updates>False</accepts_add_remove_flow_updates>
-                </device_types>
-                <logical_devices>
-                  <datapath_id>1</datapath_id>
-                  <root_device_id>simulated_olt_1</root_device_id>
-                  <switch_features>
-                    <auxiliary_id>0</auxiliary_id>
-                    <n_tables>2</n_tables>
-                    <datapath_id>0</datapath_id>
-                    <capabilities>15</capabilities>
-                    <n_buffers>256</n_buffers>
-                  </switch_features>
-                  <flows/>
-                  <id>simulated1</id>
-                  <flow_groups/>
-                    <ports>
-                      <device_port_no>2</device_port_no>
-                      <root_port>False</root_port>
-                      <device_id>simulated_onu_1</device_id>
-                      <id>onu1</id>
-                      <ofp_port>
-                        <hw_addr>
-                          <item>0</item>
-                          <item>0</item>
-                          <item>0</item>
-                          <item>0</item>
-                          <item>0</item>
-                          <item>1</item>
-                        </hw_addr>
-                        <curr_speed>32</curr_speed>
-                        <curr>4128</curr>
-                        <name>onu1</name>
-                        <supported>0</supported>
-                        <state>4</state>
-                        <max_speed>32</max_speed>
-                        <advertised>4128</advertised>
-                        <peer>4128</peer>
-                        <config>0</config>
-                        <port_no>1</port_no>
-                      </ofp_port>
-                    </ports>
-                    <ports>
-                      <device_port_no>2</device_port_no>
-                      <root_port>False</root_port>
-                      <device_id>simulated_onu_2</device_id>
-                      <id>onu2</id>
-                      <ofp_port>
-                        <hw_addr>
-                          <item>0</item>
-                          <item>0</item>
-                          <item>0</item>
-                          <item>0</item>
-                          <item>0</item>
-                          <item>2</item>
-                        </hw_addr>
-                        <curr_speed>32</curr_speed>
-                        <curr>4128</curr>
-                        <name>onu2</name>
-                        <supported>0</supported>
-                        <state>4</state>
-                        <max_speed>32</max_speed>
-                        <advertised>4128</advertised>
-                        <peer>4128</peer>
-                        <config>0</config>
-                        <port_no>2</port_no>
-                      </ofp_port>
-                    </ports>
-                    <ports>
-                      <device_port_no>2</device_port_no>
-                      <root_port>True</root_port>
-                      <device_id>simulated_olt_1</device_id>
-                      <id>olt1</id>
-                      <ofp_port>
-                        <hw_addr>
-                          <item>0</item>
-                          <item>0</item>
-                          <item>0</item>
-                          <item>0</item>
-                          <item>0</item>
-                          <item>129</item>
-                        </hw_addr>
-                        <curr_speed>32</curr_speed>
-                        <curr>4128</curr>
-                        <name>olt1</name>
-                        <supported>0</supported>
-                        <state>4</state>
-                        <max_speed>32</max_speed>
-                        <advertised>4128</advertised>
-                        <peer>4128</peer>
-                        <config>0</config>
-                        <port_no>129</port_no>
-                      </ofp_port>
-                    </ports>
-                  <desc>
-                    <dp_desc>n/a</dp_desc>
-                    <sw_desc>simualted pon</sw_desc>
-                    <hw_desc>simualted pon</hw_desc>
-                    <serial_num>985c4449d50a441ca843401e2f44e682</serial_num>
-                    <mfr_desc>cord porject</mfr_desc>
-                  </desc>
-                </logical_devices>
-              <devices>
-                <item>
-                  <vendor>simulated</vendor>
-                  <parent_port_no>0</parent_port_no>
-                  <software_version>1.0</software_version>
-                  <connect_status>UNKNOWN</connect_status>
-                  <type>simulated_olt</type>
-                  <adapter>simulated_olt</adapter>
-                  <vlan>0</vlan>
-                  <hardware_version>n/a</hardware_version>
-                  <flows>
-                    <items/>
-                  </flows>
-                  <ports>
-                    <item>
-                      <peers>
-                        <item>
-                          <port_no>1</port_no>
-                          <device_id>simulated_onu_1</device_id>
-                        </item>
-                        <item>
-                          <port_no>1</port_no>
-                          <device_id>simulated_onu_2</device_id>
-                        </item>
-                      </peers>
-                      <label>pon</label>
-                      <oper_status>UNKNOWN</oper_status>
-                      <admin_state>UNKNOWN</admin_state>
-                      <type>PON_OLT</type>
-                      <port_no>1</port_no>
-                      <device_id>simulated_olt_1</device_id>
-                    </item>
-                    <item>
-                      <peers/>
-                      <label>eth</label>
-                      <oper_status>UNKNOWN</oper_status>
-                      <admin_state>UNKNOWN</admin_state>
-                      <type>ETHERNET_NNI</type>
-                      <port_no>2</port_no>
-                      <device_id>simulated_olt_1</device_id>
-                    </item>
-                  </ports>
-                  <parent_id/>
-                  <oper_status>DISCOVERED</oper_status>
-                  <flow_groups>
-                    <items/>
-                  </flow_groups>
-                  <admin_state>UNKNOWN</admin_state>
-                  <serial_number>19addcd7305d4d4fa90300cb8e4ab9a6</serial_number>
-                  <model>n/a</model>
-                  <root>True</root>
-                  <id>simulated_olt_1</id>
-                  <firmware_version>n/a</firmware_version>
-                </item>
-                <item>
-                  <vendor>simulated</vendor>
-                  <parent_port_no>1</parent_port_no>
-                  <software_version>1.0</software_version>
-                  <connect_status>UNKNOWN</connect_status>
-                  <root>False</root>
-                  <adapter>simulated_onu</adapter>
-                  <vlan>101</vlan>
-                  <hardware_version>n/a</hardware_version>
-                  <flows>
-                    <items/>
-                  </flows>
-                  <ports>
-                    <item>
-                      <peers/>
-                      <label>eth</label>
-                      <oper_status>UNKNOWN</oper_status>
-                      <admin_state>UNKNOWN</admin_state>
-                      <type>ETHERNET_UNI</type>
-                      <port_no>2</port_no>
-                      <device_id>simulated_onu_1</device_id>
-                    </item>
-                    <item>
-                      <peers>
-                        <item>
-                          <port_no>1</port_no>
-                          <device_id>simulated_olt_1</device_id>
-                        </item>
-                      </peers>
-                      <label>pon</label>
-                      <oper_status>UNKNOWN</oper_status>
-                      <admin_state>UNKNOWN</admin_state>
-                      <type>PON_ONU</type>
-                      <port_no>1</port_no>
-                      <device_id>simulated_onu_1</device_id>
-                    </item>
-                  </ports>
-                  <parent_id>simulated_olt_1</parent_id>
-                  <oper_status>DISCOVERED</oper_status>
-                  <flow_groups>
-                    <items/>
-                  </flow_groups>
-                  <admin_state>UNKNOWN</admin_state>
-                  <serial_number>8ce6514e1b324d349038d9a80af04772</serial_number>
-                  <model>n/a</model>
-                  <type>simulated_onu</type>
-                  <id>simulated_onu_1</id>
-                  <firmware_version>n/a</firmware_version>
-                </item>
-                <item>
-                  <vendor>simulated</vendor>
-                  <parent_port_no>1</parent_port_no>
-                  <software_version>1.0</software_version>
-                  <connect_status>UNKNOWN</connect_status>
-                  <root>False</root>
-                  <adapter>simulated_onu</adapter>
-                  <vlan>102</vlan>
-                  <hardware_version>n/a</hardware_version>
-                  <flows>
-                    <items/>
-                  </flows>
-                  <ports>
-                    <item>
-                      <peers/>
-                      <label>eth</label>
-                      <oper_status>UNKNOWN</oper_status>
-                      <admin_state>UNKNOWN</admin_state>
-                      <type>ETHERNET_UNI</type>
-                      <port_no>2</port_no>
-                      <device_id>simulated_onu_2</device_id>
-                    </item>
-                    <item>
-                      <peers>
-                        <item>
-                          <port_no>1</port_no>
-                          <device_id>simulated_olt_1</device_id>
-                        </item>
-                      </peers>
-                      <label>pon</label>
-                      <oper_status>UNKNOWN</oper_status>
-                      <admin_state>UNKNOWN</admin_state>
-                      <type>PON_ONU</type>
-                      <port_no>1</port_no>
-                      <device_id>simulated_onu_2</device_id>
-                    </item>
-                  </ports>
-                  <parent_id>simulated_olt_1</parent_id>
-                  <oper_status>DISCOVERED</oper_status>
-                  <flow_groups>
-                    <items/>
-                  </flow_groups>
-                  <admin_state>UNKNOWN</admin_state>
-                  <serial_number>0dfbb5af422044639c0660b518c06519</serial_number>
-                  <model>n/a</model>
-                  <type>simulated_onu</type>
-                  <id>simulated_onu_2</id>
-                  <firmware_version>n/a</firmware_version>
-                </item>
-              </devices>
-              <instance_id>compose_voltha_1</instance_id>
-              <version>0.9.0</version>
-              <health>
-                <state>HEALTHY</state>
-              </health>
-              <device_groups>
-                <item>
-                  <logical_devices/>
-                  <id>1</id>
-                  <devices/>
-                </item>
-              </device_groups>
-              <adapters>
-                <item>
-                  <config>
-                    <log_level>INFO</log_level>
-                  </config>
-                  <version>0.1</version>
-                  <vendor>Voltha project</vendor>
-                  <id>simulated_onu</id>
-                  <logical_device_ids/>
-                </item>
-                <item>
-                  <config>
-                    <log_level>INFO</log_level>
-                  </config>
-                  <version>0.1</version>
-                  <vendor>Tibit Communications Inc.</vendor>
-                  <id>tibit_onu</id>
-                  <logical_device_ids/>
-                </item>
-                <item>
-                  <config>
-                    <log_level>INFO</log_level>
-                  </config>
-                  <version>0.1</version>
-                  <vendor>Voltha project</vendor>
-                  <id>maple_olt</id>
-                  <logical_device_ids/>
-                </item>
-                <item>
-                  <config>
-                    <log_level>INFO</log_level>
-                  </config>
-                  <version>0.1</version>
-                  <vendor>Tibit Communications Inc.</vendor>
-                  <id>tibit_olt</id>
-                  <logical_device_ids/>
-                </item>
-                <item>
-                  <config>
-                    <log_level>INFO</log_level>
-                  </config>
-                  <version>0.1</version>
-                  <vendor>Voltha project</vendor>
-                  <id>broadcom_onu</id>
-                  <logical_device_ids/>
-                </item>
-                <item>
-                  <config>
-                    <log_level>INFO</log_level>
-                  </config>
-                  <version>0.1</version>
-                  <vendor>Voltha project</vendor>
-                  <id>simulated_olt</id>
-                  <logical_device_ids/>
-                </item>
-              </adapters>
-             </instances>
-             </Voltha>
-            </data>
-        """
-        return etree.fromstring(xml_string)
\ No newline at end of file
+    def get_mock_volthainstance(self):
+        res = {'log_level': 'INFO',
+               'device_types': [
+                    {'adapter': u'broadcom_onu',
+                    'accepts_bulk_flow_update': True,
+                    'id': u'broadcom_onu',
+                    'accepts_add_remove_flow_updates': False
+                    },
+                    {'adapter': u'maple_olt',
+                    'accepts_bulk_flow_update': True,
+                    'id': u'maple_olt',
+                     'accepts_add_remove_flow_updates': False
+                     },
+                    {'adapter': u'ponsim_olt',
+                     'accepts_bulk_flow_update': True,
+                    'id': u'ponsim_olt',
+                     'accepts_add_remove_flow_updates': False
+                     },
+                    {'adapter': u'ponsim_onu',
+                     'accepts_bulk_flow_update': True,
+                    'id': u'ponsim_onu',
+                     'accepts_add_remove_flow_updates': False
+                     },
+                    {'adapter': u'simulated_olt',
+                     'accepts_bulk_flow_update': True,
+                    'id': u'simulated_olt',
+                     'accepts_add_remove_flow_updates': False
+                     },
+                    {'adapter': u'simulated_onu',
+                     'accepts_bulk_flow_update': True,
+                    'id': u'simulated_onu',
+                     'accepts_add_remove_flow_updates': False
+                     },
+                     {'adapter': u'tibit_olt',
+                      'accepts_bulk_flow_update': True,
+                      'id': u'tibit_olt',
+                      'accepts_add_remove_flow_updates': False
+                      },
+                      {'adapter': u'tibit_onu',
+                       'accepts_bulk_flow_update': True,
+                       'id': u'tibit_onu',
+                       'accepts_add_remove_flow_updates': False}
+               ],
+               'logical_devices': [],
+               'devices': [],
+               'instance_id': u'compose_voltha_1',
+               'version': u'0.9.0',
+               'health': {'state': 'HEALTHY'},
+               'device_groups': [],
+               'adapters': [
+                   {'config': {'log_level': 'INFO'},
+                    'version': u'0.1',
+                    'vendor': u'Voltha project',
+                    'id': u'broadcom_onu',
+                    'logical_device_ids': []
+                    },
+                   {'config': {'log_level': 'INFO'},
+                    'version': u'0.1',
+                    'vendor': u'Voltha project',
+                    'id': u'maple_olt',
+                    'logical_device_ids': []},
+                   {'config': {'log_level': 'INFO'},
+                    'version': u'0.4',
+                    'vendor': u'Voltha project',
+                    'id': u'ponsim_olt',
+                    'logical_device_ids': []
+                    },
+                   {'config': {'log_level': 'INFO'},
+                    'version': u'0.4',
+                    'vendor': u'Voltha project',
+                    'id': u'ponsim_onu',
+                    'logical_device_ids': []
+                    },
+                   {'config': {'log_level': 'INFO'},
+                    'version': u'0.1',
+                    'vendor': u'Voltha project',
+                    'id': u'simulated_olt',
+                    'logical_device_ids': []
+                    },
+                   {'config': {'log_level': 'INFO'},
+                    'version': u'0.1',
+                    'vendor': u'Voltha project',
+                    'id': u'simulated_onu',
+                    'logical_device_ids': []
+                    },
+                   {'config': {'log_level': 'INFO'},
+                    'version': u'0.1',
+                    'vendor': u'Tibit Communications Inc.',
+                    'id': u'tibit_olt',
+                    'logical_device_ids': []
+                    },
+                   {'config': {'log_level': 'INFO'},
+                    'version': u'0.1',
+                    'vendor': u'Tibit Communications Inc.',
+                    'id': u'tibit_onu',
+                    'logical_device_ids': []
+                    }
+               ]
+        }
+        devices_array = []
+        flow_items = []
+        for i in xrange(1, 10):
+            flow_items.append({
+                'items': {
+                    'id': str(i),
+                    'table_id': 'table_id_' + str(i),
+                    'flags': i,
+                    'instructions' : [
+                        {'type' : i, 'goto_table': 'table_id_' + str(i) },
+                        {'type': i, 'meter': i},
+                        {'type': i,
+                         'actions': {'actions': [
+                                        {'type': 11,
+                                        'output': {
+                                            'port': i,
+                                            'max_len': i}
+                                         }
+                                    ]}
+                         }
+                    ]
+                }
+            }
+            )
+        for i in xrange(1, 10):
+            devices_array.append({
+                'id': str(i),
+                'type': 'type_' + str(i),
+                'vlan': i,
+                'flows': flow_items
+            })
+        res['devices'] = devices_array
+        xml = dicttoxml.dicttoxml(res, attr_type=True)
+        root = etree.fromstring(xml)
+        # print etree.tounicode(root, pretty_print=True)
+        request = {'class': 'VolthaInstance'}
+        top = RpcResponse().build_yang_response(root, request)
+        return top
\ No newline at end of file