don't return snmp-index < 0

inventory_provider/routes/poller.py

@@ -172,7 +172,6 @@ def _load_interfaces(hostname):
                 'name': ifc['name'],
                 'bundle': ifc['bundle'],
                 'bundle-parents': [],
-                'snmp-index': -1,
                 'description': ifc['description'],
                 'circuits': []
             }