diff --git a/documentation/CookBook.md b/documentation/CookBook.md
index 04d0db9..d7bb790 100644
--- a/documentation/CookBook.md
+++ b/documentation/CookBook.md
@@ -9,10 +9,24 @@
 
 ### Popule data in Netbox
 
-Generate a Netbox token via webui and execute the python script
+Generate a Netbox token via webui and execute the python script, and on utilities folder start population :
 
 ```bash
-python import.py http://localhost:8080 YOUR_NETBOX_TOKEN device_model.yml subnets.yml
+uv run import.py http://localhost:8080 YOUR_TOKEN Devices/devices_model.yml
 ```
 
 ## Create Fabric
+
+```bash
+uv run Create_Fabric/main.py
+NetBox URL: http://localhost:8080                   
+NetBox API Token: 
+Number of buildings (1-5): 4
+Spine device type slug: ceos
+Leaf device type slug: ceos
+Access switch device type slug: ceos
+
+Existing Sites:
+  1. Paris (slug=paris)
+Choose site number or 'new': 1
+```
diff --git a/utilities/Create_Fabric/fabric_creator.py b/utilities/Create_Fabric/fabric_creator.py
index 78d4c0c..8133d52 100644
--- a/utilities/Create_Fabric/fabric_creator.py
+++ b/utilities/Create_Fabric/fabric_creator.py
@@ -152,7 +152,7 @@ class VXLANFabricCreator:
             )
 
             # Création Leaf
-            leaf_name = f"{self.config.site_code.lower()}{str(building_num).zfill(2)}_lf1_00"
+            leaf_name = f"{self.config.site_code.lower()}{str(building_num).zfill(2)}_lf{str(building_num).zfill(1)}_00"
             leaf = self.nb.create_device(
                 name=leaf_name,
                 device_type_slug=self.config.leaf_type,