diff --git a/main.py b/main.py
index 0c324aa..2509526 100644
--- a/main.py
+++ b/main.py
@@ -262,10 +262,21 @@ class Switch:
 
         post_reboot = requests.post(url_reboot, data=json.dumps(data), headers=self.headers)
 
+limit = False
 if "--limit" in sys.argv:
-    list_index = sys.argv.index("--limit") + 1
-    if len(sys.argv) >= list_index:
+    limit = True
+    limit_list_index = sys.argv.index("--limit") + 1
+    if len(sys.argv) <= limit_list_index:
         raise RuntimeError("--limit must be followeb by a comma separated list of switch")
+    limit_switchs = set(
+        filter(
+            bool,
+            map(
+                lambda x: x.strip(),
+                sys.argv[limit_list_index].split(',')
+            )
+        )
+    )
 
 #if "--force" in sys.argv:
 #    sw = Switch()