diff --git a/confluent_server/confluent/discovery/handlers/smm3.py b/confluent_server/confluent/discovery/handlers/smm3.py
index 7e663dc2..8d93cc3e 100644
--- a/confluent_server/confluent/discovery/handlers/smm3.py
+++ b/confluent_server/confluent/discovery/handlers/smm3.py
@@ -25,6 +25,8 @@ getaddrinfo = eventlet.support.greendns.getaddrinfo
 
 class NodeHandler(redfishbmc.NodeHandler):
     devname = 'SMM3'
+    maxmacs = 18  # support an enclosure, but try to avoid catching daisy chain
+    is_enclosure = True
 
     def scan(self):
         attrs = self.info.get('attributes', {})