diff --git a/data/grid5000/sites/lyon/clusters/sagittaire/nodes/sagittaire-77.json b/data/grid5000/sites/lyon/clusters/sagittaire/nodes/sagittaire-77.json
index 02c7503ecf4efc36a984dd721f36a2b3f539ff70..e4f2b824f809cd77bfd00e44403cddb35203f067 100755
--- a/data/grid5000/sites/lyon/clusters/sagittaire/nodes/sagittaire-77.json
+++ b/data/grid5000/sites/lyon/clusters/sagittaire/nodes/sagittaire-77.json
@@ -14,7 +14,7 @@
       "enabled": true,
       "interface": "Ethernet",
       "ip": "10.69.1.177",
-      "mac": null,
+      "mac": "00:09:3d:11:c5:2b",
       "management": false,
       "model": "BCM5704",
       "mountable": true,
@@ -28,7 +28,7 @@
       "enabled": true,
       "interface": "Ethernet",
       "ip": "10.69.1.77",
-      "mac": null,
+      "mac": "00:09:3d:11:c5:2c",
       "management": false,
       "model": "BCM5704",
       "mountable": true,
diff --git a/data/grid5000/sites/lyon/clusters/sagittaire/nodes/sagittaire-78.json b/data/grid5000/sites/lyon/clusters/sagittaire/nodes/sagittaire-78.json
index c2f4e4b0e297fc28636a6fa8901b79faabb0c0a9..c8f4f8ef5af71560766611f4125417f62e2ed000 100755
--- a/data/grid5000/sites/lyon/clusters/sagittaire/nodes/sagittaire-78.json
+++ b/data/grid5000/sites/lyon/clusters/sagittaire/nodes/sagittaire-78.json
@@ -14,7 +14,7 @@
       "enabled": true,
       "interface": "Ethernet",
       "ip": "10.69.1.178",
-      "mac": null,
+      "mac": "00:09:3d:11:12:2b",
       "management": false,
       "model": "BCM5704",
       "mountable": true,
@@ -28,7 +28,7 @@
       "enabled": true,
       "interface": "Ethernet",
       "ip": "10.69.1.78",
-      "mac": null,
+      "mac": "00:09:3d:11:12:2c",
       "management": false,
       "model": "BCM5704",
       "mountable": true,
diff --git a/data/grid5000/sites/lyon/clusters/sagittaire/nodes/sagittaire-79.json b/data/grid5000/sites/lyon/clusters/sagittaire/nodes/sagittaire-79.json
index 83b98286a23c8a49b262d3a8c0e95cb1cef8c868..37b06ba8cd84d9af9e5f42c15f98e14aa3b092e9 100755
--- a/data/grid5000/sites/lyon/clusters/sagittaire/nodes/sagittaire-79.json
+++ b/data/grid5000/sites/lyon/clusters/sagittaire/nodes/sagittaire-79.json
@@ -14,7 +14,7 @@
       "enabled": true,
       "interface": "Ethernet",
       "ip": "10.69.1.179",
-      "mac": null,
+      "mac": "00:09:3d:11:cd:8b",
       "management": false,
       "model": "BCM5704",
       "mountable": true,
@@ -28,7 +28,7 @@
       "enabled": true,
       "interface": "Ethernet",
       "ip": "10.69.1.79",
-      "mac": null,
+      "mac": "00:09:3d:11:cd:8c",
       "management": false,
       "model": "BCM5704",
       "mountable": true,
diff --git a/generators/input/lyon.yaml b/generators/input/lyon.yaml
index f800b69d27c5212d8de0ae822edd87b9494984ec..261a7d5b1cbd0aa6c6dda270a682eaf5ea976739 100644
--- a/generators/input/lyon.yaml
+++ b/generators/input/lyon.yaml
@@ -733,6 +733,27 @@ sagittaire-72:
   ip_eth1: 10.69.1.72
   ip_mgt: 10.69.137.72
   mac_mgt: 00:09:3d:11:ae:fe
+sagittaire-77:
+  mac_eth0: 00:09:3d:11:c5:2b
+  ip_eth0: 10.69.1.177
+  mac_eth1: 00:09:3d:11:c5:2c
+  ip_eth1: 10.69.1.77
+  mac_mgt: 00:09:3d:11:c5:2d
+  ip_mgt: 10.69.137.77
+sagittaire-78:
+  mac_eth0: 00:09:3d:11:12:2b
+  ip_eth0: 10.69.1.178
+  mac_eth1: 00:09:3d:11:12:2c
+  ip_eth1: 10.69.1.78
+  ip_mgt: 10.69.137.78
+  mac_mgt: 00:09:3d:11:12:2d
+sagittaire-79:
+  mac_eth0: 00:09:3d:11:cd:8b
+  ip_eth0: 10.69.1.179
+  mac_eth1: 00:09:3d:11:cd:8c
+  ip_eth1: 10.69.1.79
+  mac_mgt: 00:09:3d:11:cd:8d
+  ip_mgt: 10.69.137.79
 sagittaire-7:
   mac_eth0: 00:09:3d:12:7f:e9
   ip_eth0: 10.69.1.107