diff --git a/models/plugins/yang/mano-types.yang b/models/plugins/yang/mano-types.yang
index cd5d446..3c723f4 100644
--- a/models/plugins/yang/mano-types.yang
+++ b/models/plugins/yang/mano-types.yang
@@ -1936,9 +1936,12 @@
         type string;
       }
 
-      leaf-list dns-server {
-        description "List of DNS Servers associated with IP Profile";
-        type inet:ip-address;
+      list dns-server {
+        key "address";
+        leaf address {
+					description "List of DNS Servers associated with IP Profile";
+					type inet:ip-address;
+        }
       }
 
       container dhcp-params {  
diff --git a/rwcal/plugins/vala/rwcal_openstack/rwcal_openstack.py b/rwcal/plugins/vala/rwcal_openstack/rwcal_openstack.py
index eecd077..f0095f1 100644
--- a/rwcal/plugins/vala/rwcal_openstack/rwcal_openstack.py
+++ b/rwcal/plugins/vala/rwcal_openstack/rwcal_openstack.py
@@ -1,5 +1,5 @@
 
-# 
+#
 #   Copyright 2016 RIFT.IO Inc
 #
 #   Licensed under the Apache License, Version 2.0 (the "License");
@@ -1296,11 +1296,11 @@
             except Exception as e:
                 self.log.error("Encountered exceptions during network creation. Exception: %s", str(e))
                 raise
-            
+
             kwargs = {'network_id' : network_id,
                       'dhcp_params': {'enable_dhcp': True},
                       'gateway_ip' : None,}
-            
+
             if link_params.ip_profile_params.has_field('ip_version'):
                 kwargs['ip_version'] = 6 if link_params.ip_profile_params.ip_version == 'ipv6' else 4
             else:
@@ -1315,7 +1315,7 @@
                                    link_params.ip_profile_params.subnet_prefix_pool,
                                    link_params.name)
                     raise NeutronException.NotFound("SubnetPool with name %s not found"%(link_params.ip_profile_params.subnet_prefix_pool))
-                
+
                 kwargs['subnetpool_id'] = subnet_pool['id']
             elif link_params.has_field('subnet'):
                 kwargs['cidr'] = link_params.subnet
@@ -1329,17 +1329,17 @@
                     kwargs['dhcp_params']['start_address']  = link_params.ip_profile_params.dhcp_params.start_address
                 if link_params.ip_profile_params.dhcp_params.has_field('count'):
                     kwargs['dhcp_params']['count']  = link_params.ip_profile_params.dhcp_params.count
-    
+
             if link_params.ip_profile_params.has_field('dns_server'):
                 kwargs['dns_server'] = []
                 for server in link_params.ip_profile_params.dns_server:
-                    kwargs['dns_server'].append(server)
+                    kwargs['dns_server'].append(server.address)
 
             if link_params.ip_profile_params.has_field('gateway_address'):
                 kwargs['gateway_ip'] = link_params.ip_profile_params.gateway_address
-                
+
             drv.neutron_subnet_create(**kwargs)
-            
+
         return network_id
 
 
@@ -1504,8 +1504,8 @@
         elif available.has_field('pcie_device'):
             self.log.debug("Rejecting available flavor because pcie_device not required but available")
             return False
-                        
-                    
+
+
         if required.has_field('mempage_size'):
             self.log.debug("Matching mempage_size")
             if available.has_field('mempage_size') == False:
@@ -1518,7 +1518,7 @@
         elif available.has_field('mempage_size'):
             self.log.debug("Rejecting available flavor because mempage_size not required but available")
             return False
-        
+
         if required.has_field('cpu_pinning_policy'):
             self.log.debug("Matching cpu_pinning_policy")
             if required.cpu_pinning_policy != 'ANY':
@@ -1532,7 +1532,7 @@
         elif available.has_field('cpu_pinning_policy'):
             self.log.debug("Rejecting available flavor because cpu_pinning_policy not required but available")
             return False
-        
+
         if required.has_field('cpu_thread_pinning_policy'):
             self.log.debug("Matching cpu_thread_pinning_policy")
             if available.has_field('cpu_thread_pinning_policy') == False:
@@ -1559,7 +1559,7 @@
         elif available.has_field('trusted_execution'):
             self.log.debug("Rejecting available flavor because trusted_execution not required but available")
             return False
-        
+
         if required.has_field('numa_node_policy'):
             self.log.debug("Matching numa_node_policy")
             if available.has_field('numa_node_policy') == False:
@@ -1578,7 +1578,7 @@
                 elif available.numa_node_policy.has_field('node_cnt'):
                     self.log.debug("Rejecting available flavor because numa node count not required but available")
                     return False
-                
+
                 if required.numa_node_policy.has_field('mem_policy'):
                     self.log.debug("Matching numa_node_policy mem_policy")
                     if available.numa_node_policy.has_field('mem_policy') == False:
@@ -1645,7 +1645,7 @@
         elif available.has_field('cpu_model'):
             self.log.debug("Rejecting available flavor because cpu_model not required but available")
             return False
-        
+
         if required.has_field('cpu_arch'):
             self.log.debug("Matching CPU architecture")
             if available.has_field('cpu_arch') == False:
@@ -1659,7 +1659,7 @@
         elif available.has_field('cpu_arch'):
             self.log.debug("Rejecting available flavor because cpu_arch not required but available")
             return False
-        
+
         if required.has_field('cpu_vendor'):
             self.log.debug("Matching CPU vendor")
             if available.has_field('cpu_vendor') == False:
@@ -1686,7 +1686,7 @@
         elif available.has_field('cpu_socket_count'):
             self.log.debug("Rejecting available flavor because cpu_socket_count not required but available")
             return False
-        
+
         if required.has_field('cpu_core_count'):
             self.log.debug("Matching CPU core count")
             if available.has_field('cpu_core_count') == False:
@@ -1699,7 +1699,7 @@
         elif available.has_field('cpu_core_count'):
             self.log.debug("Rejecting available flavor because cpu_core_count not required but available")
             return False
-        
+
         if required.has_field('cpu_core_thread_count'):
             self.log.debug("Matching CPU core thread count")
             if available.has_field('cpu_core_thread_count') == False:
@@ -1712,7 +1712,7 @@
         elif available.has_field('cpu_core_thread_count'):
             self.log.debug("Rejecting available flavor because cpu_core_thread_count not required but available")
             return False
-    
+
         if required.has_field('cpu_feature'):
             self.log.debug("Matching CPU feature list")
             if available.has_field('cpu_feature') == False:
@@ -1726,13 +1726,13 @@
         elif available.has_field('cpu_feature'):
             self.log.debug("Rejecting available flavor because cpu_feature not required but available")
             return False
-        self.log.info("Successful match for Host EPA attributes")            
+        self.log.info("Successful match for Host EPA attributes")
         return True
 
 
     def _match_placement_group_inputs(self, required, available):
         self.log.info("Matching Host aggregate attributes")
-        
+
         if not required and not available:
             # Host aggregate not required and not available => success
             self.log.info("Successful match for Host Aggregate attributes")
@@ -1753,7 +1753,7 @@
             #  - Host aggregate not required but available
             self.log.debug("Rejecting available flavor because host Aggregate mismatch. Required: %s, Available: %s ", required, available)
             return False
-                    
+
     def match_epa_params(self, resource_info, request_params):
         result = self._match_vm_flavor(getattr(request_params, 'vm_flavor'),
                                        getattr(resource_info, 'vm_flavor'))
@@ -1791,11 +1791,11 @@
         if result == False:
             self.log.debug("Host Aggregate mismatched")
             return False
-        
+
         return True
 
     def _select_resource_flavor(self, account, vdu_init):
-        """ 
+        """
             Select a existing flavor if it matches the request or create new flavor
         """
         flavor = RwcalYang.FlavorInfoItem()
@@ -1803,7 +1803,7 @@
         epa_types = ['vm_flavor', 'guest_epa', 'host_epa', 'host_aggregate', 'hypervisor_epa', 'vswitch_epa']
         epa_dict = {k: v for k, v in vdu_init.as_dict().items() if k in epa_types}
         flavor.from_dict(epa_dict)
- 
+
         rc, response = self.do_get_flavor_list(account)
         if rc != RwTypes.RwStatus.SUCCESS:
             self.log.error("Get-flavor-info-list operation failed for cloud account: %s",
diff --git a/rwlaunchpad/plugins/rwnsm/rift/tasklets/rwnsmtasklet/openmano_nsm.py b/rwlaunchpad/plugins/rwnsm/rift/tasklets/rwnsmtasklet/openmano_nsm.py
index 94206d5..bdd5b32 100644
--- a/rwlaunchpad/plugins/rwnsm/rift/tasklets/rwnsmtasklet/openmano_nsm.py
+++ b/rwlaunchpad/plugins/rwnsm/rift/tasklets/rwnsmtasklet/openmano_nsm.py
@@ -1,5 +1,5 @@
 
-# 
+#
 #   Copyright 2016 RIFT.IO Inc
 #
 #   Licensed under the Apache License, Version 2.0 (the "License");
@@ -129,7 +129,7 @@
                     vdur_console = RwVnfrYang.YangData_RwVnfr_VnfrConsole_Vnfr_Vdur()
                     vdur_console.id = self._vdur_id
                     vdur_console.console_url = 'none'
-                      
+
                 xact_info.respond_xpath(rsp_code=rwdts.XactRspCode.ACK,
                                             xpath=self.vnfr_vdu_console_xpath,
                                             msg=vdur_console)
@@ -137,7 +137,7 @@
                 #raise VnfRecordError("Not supported operation %s" % action)
                 self._log.error("Not supported operation %s" % action)
                 xact_info.respond_xpath(rsp_code=rwdts.XactRspCode.ACK)
-                return 
+                return
 
         self._log.debug("Registering for VNFR VDU using xpath: %s",
                         self.vnfr_vdu_console_xpath)
@@ -300,14 +300,14 @@
             self._log.debug("Key pair  NSD  is %s",authorized_key)
             key_pairs.append(authorized_key.key)
 
-        if key_pairs: 
-            cloud_config["key-pairs"] = key_pairs 
-             
+        if key_pairs:
+            cloud_config["key-pairs"] = key_pairs
+
         users = list()
         for user_entry in self._nsr_config_msg.user:
             self._log.debug("User present is  %s",user_entry)
             user = {}
-            user["name"] = user_entry.name 
+            user["name"] = user_entry.name
             user["key-pairs"] = list()
             for ssh_key in user_entry.key_pair:
                 user["key-pairs"].append(ssh_key.key)
@@ -316,7 +316,7 @@
         for user_entry in self._nsd_msg.user:
             self._log.debug("User present in NSD is  %s",user_entry)
             user = {}
-            user["name"] = user_entry.name 
+            user["name"] = user_entry.name
             user["key-pairs"] = list()
             for ssh_key in user_entry.key_pair:
                 user["key-pairs"].append(ssh_key.key)
@@ -327,7 +327,7 @@
 
         self._log.debug("Cloud config formed is %s",cloud_config)
         return cloud_config
-             
+
 
     @property
     def openmano_instance_create_yaml(self):
@@ -346,7 +346,7 @@
         for vnfr in self._vnfrs:
             if "om_datacenter" in vnfr.vnfr.vnfr_msg:
                 vnfr_name = vnfr.vnfr.vnfd.name + "__" + str(vnfr.vnfr.vnfr_msg.member_vnf_index_ref)
-                openmano_instance_create["vnfs"][vnfr_name] = {"datacenter": vnfr.vnfr.vnfr_msg.om_datacenter} 
+                openmano_instance_create["vnfs"][vnfr_name] = {"datacenter": vnfr.vnfr.vnfr_msg.om_datacenter}
         openmano_instance_create["networks"] = {}
         for vld_msg in self._nsd_msg.vld:
             openmano_instance_create["networks"][vld_msg.name] = {}
@@ -371,7 +371,7 @@
                         if ip_profile_params.has_field('gateway_address'):
                             ip_profile['gateway-address'] = ip_profile_params.gateway_address
                         if ip_profile_params.has_field('dns_server') and len(ip_profile_params.dns_server) > 0:
-                            ip_profile['dns-address'] =  ip_profile_params.dns_server[0]
+                            ip_profile['dns-address'] =  ip_profile_params.dns_server[0].address
                         if ip_profile_params.has_field('dhcp_params'):
                             ip_profile['dhcp'] = {}
                             ip_profile['dhcp']['enabled'] = ip_profile_params.dhcp_params.enabled
@@ -386,11 +386,11 @@
                     elif "datacenter" in openmano_instance_create:
                         network["datacenter"] = openmano_instance_create["datacenter"]
                     if network:
-                        openmano_instance_create["networks"][vld_msg.name]["sites"].append(network) 
+                        openmano_instance_create["networks"][vld_msg.name]["sites"].append(network)
                     if ip_profile:
-                        openmano_instance_create["networks"][vld_msg.name]['ip-profile'] = ip_profile 
-        
-             
+                        openmano_instance_create["networks"][vld_msg.name]['ip-profile'] = ip_profile
+
+
         return yaml.safe_dump(openmano_instance_create, default_flow_style=False)
 
     @asyncio.coroutine
@@ -596,11 +596,11 @@
 
                         for vm in vnf_status["vms"]:
                             if vm["uuid"] not in self._vdur_console_handler:
-                                vdur_console_handler = VnfrConsoleOperdataDtsHandler(self._dts, self._log, self._loop, 
+                                vdur_console_handler = VnfrConsoleOperdataDtsHandler(self._dts, self._log, self._loop,
                                                     self, vnfr_msg.id,vm["uuid"],vm["name"])
                                 yield from vdur_console_handler.register()
                                 self._vdur_console_handler[vm["uuid"]] = vdur_console_handler
-                             
+
                             vdur_msg = vnfr_msg.vdur.add()
                             vdur_msg.vim_id = vm["vim_vm_id"]
                             vdur_msg.id = vm["uuid"]
@@ -670,7 +670,7 @@
 
         for _,handler in  self._vdur_console_handler.items():
             handler._regh.deregister()
-    
+
         if self._nsr_uuid is None:
             self._log.warning("Cannot terminate an un-instantiated nsr")
             return