diff --git a/inventory_provider/routes/msr.py b/inventory_provider/routes/msr.py
index fe83817d5d400d59834c7ec919618c213c965539..b65692acea4d28f4797327ccc28d4a0c0704fc8f 100644
--- a/inventory_provider/routes/msr.py
+++ b/inventory_provider/routes/msr.py
@@ -944,8 +944,6 @@ def get_peering_services():
     return Response(response, mimetype="application/json")
 
 
-# TODO: @functools.cache is only available in py3.9
-@functools.lru_cache(maxsize=None)
 def _load_all_interfaces():
     """
     loads all ip interfaces in the network and returns as a dict
@@ -972,8 +970,6 @@ def _load_all_interfaces():
     return result
 
 
-# TODO: @functools.cache is only available in py3.9
-@functools.lru_cache(maxsize=None)
 def _load_redundant_access_peers():
     """
     load all peers that should be considered
@@ -997,7 +993,7 @@ def _load_redundant_access_peers():
     return result
 
 
-def _ip_endpoint_extractor(endpoint_details: dict):
+def _ip_endpoint_extractor(all_interfaces: Dict, endpoint_details: Dict):
     """
     special-purpose method used only by _endpoint_extractor
 
@@ -1019,7 +1015,6 @@ def _ip_endpoint_extractor(endpoint_details: dict):
         'interface': interface,
     }
 
-    all_interfaces = _load_all_interfaces()
     # sanity: should have already been checked
     assert hostname in all_interfaces
 
@@ -1039,7 +1034,7 @@ def _ip_endpoint_extractor(endpoint_details: dict):
     return ip_endpoint
 
 
-def _endpoint_extractor(endpoint_details: Dict):
+def _endpoint_extractor(all_interfaces: Dict, endpoint_details: Dict):
     """
     special-purpose method used only by get_system_correlation_services
 
@@ -1057,9 +1052,9 @@ def _endpoint_extractor(endpoint_details: Dict):
         return
     potential_hostname = ims_equipment_to_hostname(
         endpoint_details['equipment'])
-    all_routers = _load_all_interfaces().keys()
+    all_routers = all_interfaces.keys()
     if potential_hostname in all_routers:
-        return _ip_endpoint_extractor(endpoint_details)
+        return _ip_endpoint_extractor(all_interfaces, endpoint_details)
     else:
         return {
             'equipment': endpoint_details['equipment'],
@@ -1107,6 +1102,8 @@ def get_system_correlation_services():
     response = _ignore_cache_or_retrieve(request, cache_key, r)
     if not response:
 
+        all_interfaces = _load_all_interfaces()
+
         sid_services = json.loads(r.get('ims:sid_services').decode('utf-8'))
 
         response = []
@@ -1123,7 +1120,7 @@ def get_system_correlation_services():
                     service_info['service_type'] = d['service_type']
                     service_info['customer'] = d['customer']
 
-                endpoint = _endpoint_extractor(d)
+                endpoint = _endpoint_extractor(all_interfaces, d)
                 if endpoint:
                     service_info['endpoints'].append(endpoint)