diff --git a/data/grid5000/sites/nancy/clusters/graoully/nodes/graoully-1.json b/data/grid5000/sites/nancy/clusters/graoully/nodes/graoully-1.json
index 81ea8df6fda4eaf47cccc7fbe04763c15301115f..e0018167836b7c85f665689161a15171c1ba719c 100644
--- a/data/grid5000/sites/nancy/clusters/graoully/nodes/graoully-1.json
+++ b/data/grid5000/sites/nancy/clusters/graoully/nodes/graoully-1.json
@@ -141,7 +141,7 @@
"enabled": true,
"interface": "Ethernet",
"ip": "172.17.70.1",
- "mac": null,
+ "mac": "64:00:6a:c1:57:d2",
"management": true,
"mountable": false,
"mounted": false,
diff --git a/data/grid5000/sites/nancy/clusters/graoully/nodes/graoully-10.json b/data/grid5000/sites/nancy/clusters/graoully/nodes/graoully-10.json
index 152eb73e866532fdf358004394def77e78a757e9..8ee199e608c7b7e9ae827941c2084966e0730b14 100644
--- a/data/grid5000/sites/nancy/clusters/graoully/nodes/graoully-10.json
+++ b/data/grid5000/sites/nancy/clusters/graoully/nodes/graoully-10.json
@@ -141,7 +141,7 @@
"enabled": true,
"interface": "Ethernet",
"ip": "172.17.70.10",
- "mac": null,
+ "mac": "64:00:6a:c0:f1:e4",
"management": true,
"mountable": false,
"mounted": false,
diff --git a/data/grid5000/sites/nancy/clusters/graoully/nodes/graoully-11.json b/data/grid5000/sites/nancy/clusters/graoully/nodes/graoully-11.json
index 7a52b606a2f99abff0d223ba6c59f2368d1579fe..8474d444a0ec74bf3866f3d7d68b67bb53118d78 100644
--- a/data/grid5000/sites/nancy/clusters/graoully/nodes/graoully-11.json
+++ b/data/grid5000/sites/nancy/clusters/graoully/nodes/graoully-11.json
@@ -141,7 +141,7 @@
"enabled": true,
"interface": "Ethernet",
"ip": "172.17.70.11",
- "mac": null,
+ "mac": "64:00:6a:c0:f2:2e",
"management": true,
"mountable": false,
"mounted": false,
diff --git a/data/grid5000/sites/nancy/clusters/graoully/nodes/graoully-12.json b/data/grid5000/sites/nancy/clusters/graoully/nodes/graoully-12.json
index cdb8914cbb6ee1d4b4b8e64a8b754cd008ef9b94..d181a7c82a395c00a83a29da06dc7c916f21db3f 100644
--- a/data/grid5000/sites/nancy/clusters/graoully/nodes/graoully-12.json
+++ b/data/grid5000/sites/nancy/clusters/graoully/nodes/graoully-12.json
@@ -141,7 +141,7 @@
"enabled": true,
"interface": "Ethernet",
"ip": "172.17.70.12",
- "mac": null,
+ "mac": "64:00:6a:c0:dc:36",
"management": true,
"mountable": false,
"mounted": false,
diff --git a/data/grid5000/sites/nancy/clusters/graoully/nodes/graoully-13.json b/data/grid5000/sites/nancy/clusters/graoully/nodes/graoully-13.json
index 24bd2fc6c9685ca38a5213e903c10d3425014267..7dc6bc6f6bccf1b9749519675de19e6f1ae52b11 100644
--- a/data/grid5000/sites/nancy/clusters/graoully/nodes/graoully-13.json
+++ b/data/grid5000/sites/nancy/clusters/graoully/nodes/graoully-13.json
@@ -141,7 +141,7 @@
"enabled": true,
"interface": "Ethernet",
"ip": "172.17.70.13",
- "mac": null,
+ "mac": "64:00:6a:c0:dc:a4",
"management": true,
"mountable": false,
"mounted": false,
diff --git a/data/grid5000/sites/nancy/clusters/graoully/nodes/graoully-14.json b/data/grid5000/sites/nancy/clusters/graoully/nodes/graoully-14.json
index 9df3e30a9c74174c5f6c054297ba32ff0c669a06..577e124134c0190a5c60d4d647be796d4a1dce3b 100644
--- a/data/grid5000/sites/nancy/clusters/graoully/nodes/graoully-14.json
+++ b/data/grid5000/sites/nancy/clusters/graoully/nodes/graoully-14.json
@@ -141,7 +141,7 @@
"enabled": true,
"interface": "Ethernet",
"ip": "172.17.70.14",
- "mac": null,
+ "mac": "64:00:6a:c1:56:c8",
"management": true,
"mountable": false,
"mounted": false,
diff --git a/data/grid5000/sites/nancy/clusters/graoully/nodes/graoully-15.json b/data/grid5000/sites/nancy/clusters/graoully/nodes/graoully-15.json
index 177756f9da2b11662b959cb5d2508ba377d57f7c..84680e6c262166e5baa1785f61027bc8aec21dc4 100644
--- a/data/grid5000/sites/nancy/clusters/graoully/nodes/graoully-15.json
+++ b/data/grid5000/sites/nancy/clusters/graoully/nodes/graoully-15.json
@@ -141,7 +141,7 @@
"enabled": true,
"interface": "Ethernet",
"ip": "172.17.70.15",
- "mac": null,
+ "mac": "64:00:6a:c1:56:ee",
"management": true,
"mountable": false,
"mounted": false,
diff --git a/data/grid5000/sites/nancy/clusters/graoully/nodes/graoully-16.json b/data/grid5000/sites/nancy/clusters/graoully/nodes/graoully-16.json
index 8cd95af5e89b503192e4b1ba68c61afc287117e8..6533c43ffb160370e9ffed0e60df58340c38e972 100644
--- a/data/grid5000/sites/nancy/clusters/graoully/nodes/graoully-16.json
+++ b/data/grid5000/sites/nancy/clusters/graoully/nodes/graoully-16.json
@@ -141,7 +141,7 @@
"enabled": true,
"interface": "Ethernet",
"ip": "172.17.70.16",
- "mac": null,
+ "mac": "64:00:6a:c1:55:fe",
"management": true,
"mountable": false,
"mounted": false,
diff --git a/data/grid5000/sites/nancy/clusters/graoully/nodes/graoully-2.json b/data/grid5000/sites/nancy/clusters/graoully/nodes/graoully-2.json
index 380681943af5b46fca394e9a79de470036eafa0e..ab4b2f443f7b2e2ec777b584bbd409fd4928399b 100644
--- a/data/grid5000/sites/nancy/clusters/graoully/nodes/graoully-2.json
+++ b/data/grid5000/sites/nancy/clusters/graoully/nodes/graoully-2.json
@@ -141,7 +141,7 @@
"enabled": true,
"interface": "Ethernet",
"ip": "172.17.70.2",
- "mac": null,
+ "mac": "64:00:6a:c1:56:a8",
"management": true,
"mountable": false,
"mounted": false,
diff --git a/data/grid5000/sites/nancy/clusters/graoully/nodes/graoully-3.json b/data/grid5000/sites/nancy/clusters/graoully/nodes/graoully-3.json
index 78aa3d6a4f8e241eabe6af0db9ca7f4fd2295f10..87193c84a4966dfbaaa3f7d29378aa4525fb19c3 100644
--- a/data/grid5000/sites/nancy/clusters/graoully/nodes/graoully-3.json
+++ b/data/grid5000/sites/nancy/clusters/graoully/nodes/graoully-3.json
@@ -141,7 +141,7 @@
"enabled": true,
"interface": "Ethernet",
"ip": "172.17.70.3",
- "mac": null,
+ "mac": "64:00:6a:c1:56:7e",
"management": true,
"mountable": false,
"mounted": false,
diff --git a/data/grid5000/sites/nancy/clusters/graoully/nodes/graoully-4.json b/data/grid5000/sites/nancy/clusters/graoully/nodes/graoully-4.json
index 32c1111f1d09f43f0d89a78825b076355fafa62b..905c827f7cd7c7e22863bb0f25d82df352f26454 100644
--- a/data/grid5000/sites/nancy/clusters/graoully/nodes/graoully-4.json
+++ b/data/grid5000/sites/nancy/clusters/graoully/nodes/graoully-4.json
@@ -141,7 +141,7 @@
"enabled": true,
"interface": "Ethernet",
"ip": "172.17.70.4",
- "mac": null,
+ "mac": "64:00:6a:c1:56:c6",
"management": true,
"mountable": false,
"mounted": false,
diff --git a/data/grid5000/sites/nancy/clusters/graoully/nodes/graoully-5.json b/data/grid5000/sites/nancy/clusters/graoully/nodes/graoully-5.json
index 386bb34ab0d3b781eb53885d9fd7107813ae1f47..d0ee57d2a1c057cc31bfea41786c05b93644e450 100644
--- a/data/grid5000/sites/nancy/clusters/graoully/nodes/graoully-5.json
+++ b/data/grid5000/sites/nancy/clusters/graoully/nodes/graoully-5.json
@@ -141,7 +141,7 @@
"enabled": true,
"interface": "Ethernet",
"ip": "172.17.70.5",
- "mac": null,
+ "mac": "64:00:6a:c0:dd:5e",
"management": true,
"mountable": false,
"mounted": false,
diff --git a/data/grid5000/sites/nancy/clusters/graoully/nodes/graoully-6.json b/data/grid5000/sites/nancy/clusters/graoully/nodes/graoully-6.json
index 8ab5d3292f1744231b427fb93f61ef47581c5221..6fcf966a414419817ae100a475ba485c639e15d4 100644
--- a/data/grid5000/sites/nancy/clusters/graoully/nodes/graoully-6.json
+++ b/data/grid5000/sites/nancy/clusters/graoully/nodes/graoully-6.json
@@ -141,7 +141,7 @@
"enabled": true,
"interface": "Ethernet",
"ip": "172.17.70.6",
- "mac": null,
+ "mac": "64:00:6a:c0:f1:f4",
"management": true,
"mountable": false,
"mounted": false,
diff --git a/data/grid5000/sites/nancy/clusters/graoully/nodes/graoully-7.json b/data/grid5000/sites/nancy/clusters/graoully/nodes/graoully-7.json
index 93bcdef1e99d5d4cac6b59b0838fcd8343fae22e..02b19094d3e996854183d5a25354191e9da5a46a 100644
--- a/data/grid5000/sites/nancy/clusters/graoully/nodes/graoully-7.json
+++ b/data/grid5000/sites/nancy/clusters/graoully/nodes/graoully-7.json
@@ -141,7 +141,7 @@
"enabled": true,
"interface": "Ethernet",
"ip": "172.17.70.7",
- "mac": null,
+ "mac": "64:00:6a:c0:f2:5e",
"management": true,
"mountable": false,
"mounted": false,
diff --git a/data/grid5000/sites/nancy/clusters/graoully/nodes/graoully-8.json b/data/grid5000/sites/nancy/clusters/graoully/nodes/graoully-8.json
index 0c9c94dc58a7440615296ad3fee805a1ac1a16af..f3c5f0952b07941eb1b0fcb1611a11ec9f8e4052 100644
--- a/data/grid5000/sites/nancy/clusters/graoully/nodes/graoully-8.json
+++ b/data/grid5000/sites/nancy/clusters/graoully/nodes/graoully-8.json
@@ -141,7 +141,7 @@
"enabled": true,
"interface": "Ethernet",
"ip": "172.17.70.8",
- "mac": null,
+ "mac": "64:00:6a:c0:dc:f4",
"management": true,
"mountable": false,
"mounted": false,
diff --git a/data/grid5000/sites/nancy/clusters/graoully/nodes/graoully-9.json b/data/grid5000/sites/nancy/clusters/graoully/nodes/graoully-9.json
index 44da7682baecaed7e376a2fc0a46cf060284f3d3..ce544dcd7a213db65a335810f452e0bfb514ece7 100644
--- a/data/grid5000/sites/nancy/clusters/graoully/nodes/graoully-9.json
+++ b/data/grid5000/sites/nancy/clusters/graoully/nodes/graoully-9.json
@@ -141,7 +141,7 @@
"enabled": true,
"interface": "Ethernet",
"ip": "172.17.70.9",
- "mac": null,
+ "mac": "64:00:6a:c0:f2:a6",
"management": true,
"mountable": false,
"mounted": false,