diff --git a/src/service/service/service_handlers/l3nm_gnmi_openconfig/ConfigRuleComposer.py b/src/service/service/service_handlers/l3nm_gnmi_openconfig/ConfigRuleComposer.py
index ec03f1b7a355f326f9140103a77d873025a28d09..277d6d7e1a574afafa138d517cfec4c644e25023 100644
--- a/src/service/service/service_handlers/l3nm_gnmi_openconfig/ConfigRuleComposer.py
+++ b/src/service/service/service_handlers/l3nm_gnmi_openconfig/ConfigRuleComposer.py
@@ -21,8 +21,9 @@ from service.service.service_handler_api.AnyTreeTools import TreeNode
 
 LOGGER = logging.getLogger(__name__)
 
-#NETWORK_INSTANCE = 'teraflowsdn'
+#NETWORK_INSTANCE = 'teraflowsdn' # TODO: investigate; sometimes it does not create/delete static rules properly
 NETWORK_INSTANCE = 'default'
+DEFAULT_NETWORK_INSTANCE = 'default'
 
 RE_IF    = re.compile(r'^\/interface\[([^\]]+)\]$')
 RE_SUBIF = re.compile(r'^\/interface\[([^\]]+)\]\/subinterface\[([^\]]+)\]$')
@@ -109,11 +110,13 @@ class EndpointComposer:
         if self.ipv4_address is None: return []
         if self.ipv4_prefix_len is None: return []
         json_config_rule = json_config_rule_delete if delete else json_config_rule_set
-        config_rules = [
-            #json_config_rule(*_network_instance_interface(
-            #    network_instance_name, self.objekt.name, self.sub_interface_index
-            #)),
-        ]
+
+        config_rules : List[Dict] = list()
+        if network_instance_name != DEFAULT_NETWORK_INSTANCE:
+            config_rules.append(json_config_rule(*_network_instance_interface(
+                network_instance_name, self.objekt.name, self.sub_interface_index
+            )))
+
         if delete:
             config_rules.extend([
                 json_config_rule(*_interface(
@@ -226,9 +229,9 @@ class DeviceComposer:
         if self.objekt.device_type not in SELECTED_DEVICES: return []
 
         json_config_rule = json_config_rule_delete if delete else json_config_rule_set
-        config_rules = [
-            #json_config_rule(*_network_instance(network_instance_name, 'L3VRF'))
-        ]
+        config_rules : List[Dict] = list()
+        if network_instance_name != DEFAULT_NETWORK_INSTANCE:
+            json_config_rule(*_network_instance(network_instance_name, 'L3VRF'))
         for endpoint in self.endpoints.values():
             config_rules.extend(endpoint.get_config_rules(network_instance_name, delete=delete))
         if len(self.static_routes) > 0: