diff --git a/osm_ro/vimconn_openvim.py b/osm_ro/vimconn_openvim.py
index f6d2237..6f584c5 100644
--- a/osm_ro/vimconn_openvim.py
+++ b/osm_ro/vimconn_openvim.py
@@ -485,9 +485,31 @@
             self._format_request_exception(e)
 
     def new_network(self,net_name, net_type, ip_profile=None, shared=False, vlan=None): #, **vim_specific):
-        '''Adds a tenant network to VIM'''
-        '''Returns the network identifier'''
+        """Adds a tenant network to VIM
+        Params:
+            'net_name': name of the network
+            'net_type': one of:
+                'bridge': overlay isolated network
+                'data':   underlay E-LAN network for Passthrough and SRIOV interfaces
+                'ptp':    underlay E-LINE network for Passthrough and SRIOV interfaces.
+            'ip_profile': is a dict containing the IP parameters of the network
+                'ip_version': can be "IPv4" or "IPv6" (Currently only IPv4 is implemented)
+                'subnet_address': ip_prefix_schema, that is X.X.X.X/Y
+                'gateway_address': (Optional) ip_schema, that is X.X.X.X
+                'dns_address': (Optional) comma separated list of ip_schema, e.g. X.X.X.X[,X,X,X,X]
+                'dhcp_enabled': True or False
+                'dhcp_start_address': ip_schema, first IP to grant
+                'dhcp_count': number of IPs to grant.
+            'shared': if this network can be seen/use by other tenants/organization
+            'vlan': in case of a data or ptp net_type, the intended vlan tag to be used for the network
+        Returns a tuple with the network identifier and created_items, or raises an exception on error
+            created_items can be None or a dictionary where this method can include key-values that will be passed to
+            the method delete_network. Can be used to store created segments, created l2gw connections, etc.
+            Format is vimconnector dependent, but do not use nested dictionaries and a value of None should be the same
+            as not present.
+        """
         try:
+            created_items = {}
             self._get_my_tenant()
             if net_type=="bridge":
                 net_type="bridge_data"
@@ -507,7 +529,7 @@
             #if r is not None: 
             #    self.logger.warn("Warning: remove extra items %s", str(r))
             network_id = response['network']['id']
-            return network_id
+            return network_id, created_items
         except (requests.exceptions.RequestException, js_e.ValidationError) as e:
             self._format_request_exception(e)
         
@@ -558,9 +580,13 @@
         except (requests.exceptions.RequestException, js_e.ValidationError) as e:
             self._format_request_exception(e)
             
-    def delete_network(self, net_id):
-        '''Deletes a tenant network from VIM'''
-        '''Returns the network identifier'''
+    def delete_network(self, net_id, created_items=None):
+        """
+        Removes a tenant network from VIM and its associated elements
+        :param net_id: VIM identifier of the network, provided by method new_network
+        :param created_items: dictionary with extra items to be deleted. provided by method new_network
+        Returns the network identifier or raises an exception upon error or when network is not found
+        """
         try:
             self._get_my_tenant()
             url = self.url+'/networks/'+net_id