diff --git a/data/grid5000/sites/orsay/clusters/netgdx/nodes/netgdx-6.json b/data/grid5000/sites/orsay/clusters/netgdx/nodes/netgdx-6.json
index da7b8a0246106e38d0aebe30c7576a2fb2992d6c..337b826aa1e6b1595fc8337b1fca825027353fd1 100755
--- a/data/grid5000/sites/orsay/clusters/netgdx/nodes/netgdx-6.json
+++ b/data/grid5000/sites/orsay/clusters/netgdx/nodes/netgdx-6.json
@@ -15,7 +15,7 @@
       "enabled": true,
       "interface": "Ethernet",
       "ip": "172.26.240.6",
-      "mac": null,
+      "mac": "00:11:25:91:45:85",
       "management": true,
       "mountable": false,
       "mounted": false,
@@ -36,7 +36,7 @@
       "enabled": true,
       "interface": "Ethernet",
       "ip": "172.24.110.6",
-      "mac": null,
+      "mac": "00:11:25:C4:24:1E",
       "management": false,
       "mountable": true,
       "mounted": true,
@@ -54,7 +54,7 @@
       "enabled": false,
       "interface": "Ethernet",
       "ip": "172.24.240.6",
-      "mac": null,
+      "mac": "00:11:25:C4:24:1F",
       "management": false,
       "mountable": false,
       "mounted": false,
@@ -72,7 +72,7 @@
       "enabled": true,
       "interface": "Ethernet",
       "ip": "172.24.190.6",
-      "mac": null,
+      "mac": "00:10:18:16:4C:29",
       "management": false,
       "mountable": false,
       "mounted": false,
diff --git a/generators/input/orsay-netgdx.yaml b/generators/input/orsay-netgdx.yaml
index 1a9e96be4cad7b1041a340474b011bff53a110aa..328e63442d34f948dc0fe832c2a78ebfffda19ae 100644
--- a/generators/input/orsay-netgdx.yaml
+++ b/generators/input/orsay-netgdx.yaml
@@ -314,12 +314,16 @@ netgdx-5:
     ip: 172.24.190.5
 netgdx-6: 
   bmc: 
+    mac: 00:11:25:91:45:85
     ip: 172.26.240.6
   eth0: 
+    mac: 00:11:25:C4:24:1E
     ip: 172.24.110.6
   eth1: 
+    mac: 00:11:25:C4:24:1F
     ip: 172.24.240.6
   eth2: 
+    mac: 00:10:18:16:4C:29
     ip: 172.24.190.6
 netgdx-14: 
   bmc: