diff --git a/data/grid5000/sites/lille/network_equipments/gw-lille.json b/data/grid5000/sites/lille/network_equipments/gw-lille.json
index 09f384de10407bab4b4300eed13ab3bc9a60feac..59c6ac2bbf9dc1ed3fb4e241b9b8b1373dd21db0 100644
--- a/data/grid5000/sites/lille/network_equipments/gw-lille.json
+++ b/data/grid5000/sites/lille/network_equipments/gw-lille.json
@@ -551,6 +551,7 @@
     }
   ],
   "model": "cisco WS-C6506-E",
+  "mtu": 9216,
   "routes": {
 
   },
diff --git a/data/grid5000/sites/lille/network_equipments/myrinet.json b/data/grid5000/sites/lille/network_equipments/myrinet.json
index 7727d7f8945e9a720c02c6c6fdfee7559869fda1..b8f5f3571162d81ed47ffcd7f5dd05d6e11f436b 100644
--- a/data/grid5000/sites/lille/network_equipments/myrinet.json
+++ b/data/grid5000/sites/lille/network_equipments/myrinet.json
@@ -20,6 +20,7 @@
     }
   ],
   "model": "myricom",
+  "mtu": null,
   "routes": {
 
   },
diff --git a/generators/input/net-links.rb b/generators/input/net-links.rb
index 2b42fa6987c31ef0f7f6e830e8b63627b0288cf6..f468ba5a3c6059e0e7ab23a7dc33777c669f8deb 100644
--- a/generators/input/net-links.rb
+++ b/generators/input/net-links.rb
@@ -16,7 +16,7 @@
       routes properties["routes"]
       channels properties["channels"]
       backplane_bps properties["backplane_bps"]
-
+      mtu  properties["mtu"]
       # Change the format of linecard from Hash to Array
       linecards_array = []
       properties["linecards"].each do |linecard_index,linecard|
diff --git a/generators/input/sites/lille/net-links/gw-lille.yaml b/generators/input/sites/lille/net-links/gw-lille.yaml
index 08ab5c9e6ad41a46b2ead5da1f17d005b25c970a..7f4c0ce19ba629196bc5336c635dc4a445d6a264 100644
--- a/generators/input/sites/lille/net-links/gw-lille.yaml
+++ b/generators/input/sites/lille/net-links/gw-lille.yaml
@@ -6,6 +6,7 @@ gw-lille:
   snmp_community: public
   routes: {}
   backplane_bps: 720000000000
+  mtu: 9216
   vlans:
     naming_pattern: Vlan%VLANID%
     "vlan100":