diff --git a/data/grid5000/sites/lille/clusters/chuc/nodes/chuc-1.json b/data/grid5000/sites/lille/clusters/chuc/nodes/chuc-1.json
index a5e38c409823aa3f30ab7fa210758557bea7e5f9..d8b059d353bcdb1224167dfa836f99a3b9cf6da4 100644
--- a/data/grid5000/sites/lille/clusters/chuc/nodes/chuc-1.json
+++ b/data/grid5000/sites/lille/clusters/chuc/nodes/chuc-1.json
@@ -28,7 +28,7 @@
       "ip": "172.16.32.1",
       "ip6": "2001:660:4406:200:1::1",
       "kavlan": false,
-      "mac": "b4:7a:f1:c1:42:aa",
+      "mac": "b4:7a:f1:c1:42:01",
       "mountable": true,
       "mounted": true,
       "network_address": "chuc-1.lille.grid5000.fr",
diff --git a/data/grid5000/sites/lille/clusters/chuc/nodes/chuc-2.json b/data/grid5000/sites/lille/clusters/chuc/nodes/chuc-2.json
index 9b002ed101ba7fcf8985601c86e281992be92c89..5b10102562217f5915776bf794b522b981fb302e 100644
--- a/data/grid5000/sites/lille/clusters/chuc/nodes/chuc-2.json
+++ b/data/grid5000/sites/lille/clusters/chuc/nodes/chuc-2.json
@@ -28,7 +28,7 @@
       "ip": "172.16.32.2",
       "ip6": "2001:660:4406:200:1::2",
       "kavlan": false,
-      "mac": "b4:7a:f1:c1:42:bb",
+      "mac": "b4:7a:f1:c1:42:02",
       "mountable": true,
       "mounted": true,
       "network_address": "chuc-2.lille.grid5000.fr",
diff --git a/data/grid5000/sites/lille/clusters/chuc/nodes/chuc-3.json b/data/grid5000/sites/lille/clusters/chuc/nodes/chuc-3.json
index 9db8c5a47be8565103a1d5eb2262addc60fbc084..41cf7f4c104d0ea2fe9584279f77226ac85c68d5 100644
--- a/data/grid5000/sites/lille/clusters/chuc/nodes/chuc-3.json
+++ b/data/grid5000/sites/lille/clusters/chuc/nodes/chuc-3.json
@@ -28,7 +28,7 @@
       "ip": "172.16.32.3",
       "ip6": "2001:660:4406:200:1::3",
       "kavlan": false,
-      "mac": "b4:7a:f1:c5:62:cc",
+      "mac": "b4:7a:f1:c5:62:03",
       "mountable": true,
       "mounted": true,
       "network_address": "chuc-3.lille.grid5000.fr",
diff --git a/data/grid5000/sites/lille/clusters/chuc/nodes/chuc-4.json b/data/grid5000/sites/lille/clusters/chuc/nodes/chuc-4.json
index 10a03abd9076be0c19afa10a5c60bd38c03e124d..830810b945764d77daaa4d7568d0c6c78dc602a1 100644
--- a/data/grid5000/sites/lille/clusters/chuc/nodes/chuc-4.json
+++ b/data/grid5000/sites/lille/clusters/chuc/nodes/chuc-4.json
@@ -28,7 +28,7 @@
       "ip": "172.16.32.4",
       "ip6": "2001:660:4406:200:1::4",
       "kavlan": false,
-      "mac": "b4:7a:f1:c1:42:dd",
+      "mac": "b4:7a:f1:c1:42:04",
       "mountable": true,
       "mounted": true,
       "network_address": "chuc-4.lille.grid5000.fr",
diff --git a/data/grid5000/sites/lille/clusters/chuc/nodes/chuc-5.json b/data/grid5000/sites/lille/clusters/chuc/nodes/chuc-5.json
index 669afcf88e63f0bf61d470b63f88e189e4587dcb..9535b4859f6241a85e79d5951b88d036d84f212e 100644
--- a/data/grid5000/sites/lille/clusters/chuc/nodes/chuc-5.json
+++ b/data/grid5000/sites/lille/clusters/chuc/nodes/chuc-5.json
@@ -28,7 +28,7 @@
       "ip": "172.16.32.5",
       "ip6": "2001:660:4406:200:1::5",
       "kavlan": false,
-      "mac": "b4:7a:f1:c1:42:ee",
+      "mac": "b4:7a:f1:c1:42:05",
       "mountable": true,
       "mounted": true,
       "network_address": "chuc-5.lille.grid5000.fr",
diff --git a/data/grid5000/sites/lille/clusters/chuc/nodes/chuc-6.json b/data/grid5000/sites/lille/clusters/chuc/nodes/chuc-6.json
index 298934c15a9ff8f018bcd9d66310110a05592303..257a6d994f3542a8c6844c473991f9c60c321f75 100644
--- a/data/grid5000/sites/lille/clusters/chuc/nodes/chuc-6.json
+++ b/data/grid5000/sites/lille/clusters/chuc/nodes/chuc-6.json
@@ -28,7 +28,7 @@
       "ip": "172.16.32.6",
       "ip6": "2001:660:4406:200:1::6",
       "kavlan": false,
-      "mac": "b4:7a:f1:c1:42:ff",
+      "mac": "b4:7a:f1:c1:42:06",
       "mountable": true,
       "mounted": true,
       "network_address": "chuc-6.lille.grid5000.fr",
diff --git a/data/grid5000/sites/lille/clusters/chuc/nodes/chuc-7.json b/data/grid5000/sites/lille/clusters/chuc/nodes/chuc-7.json
index 6e488264c9f758deca7420ab0ec7eeca381eb662..da32ac3d0c606723cc9c37888817ea2535d99f95 100644
--- a/data/grid5000/sites/lille/clusters/chuc/nodes/chuc-7.json
+++ b/data/grid5000/sites/lille/clusters/chuc/nodes/chuc-7.json
@@ -28,7 +28,7 @@
       "ip": "172.16.32.7",
       "ip6": "2001:660:4406:200:1::7",
       "kavlan": false,
-      "mac": "b4:7a:f1:c1:42:gg",
+      "mac": "b4:7a:f1:c1:42:07",
       "mountable": true,
       "mounted": true,
       "network_address": "chuc-7.lille.grid5000.fr",
diff --git a/data/grid5000/sites/lille/clusters/chuc/nodes/chuc-8.json b/data/grid5000/sites/lille/clusters/chuc/nodes/chuc-8.json
index 9b6609c3ad6af88c6fd349d2a570fd40dd9cd51b..dca601ab5a69d735f5e03343af47746de9229091 100644
--- a/data/grid5000/sites/lille/clusters/chuc/nodes/chuc-8.json
+++ b/data/grid5000/sites/lille/clusters/chuc/nodes/chuc-8.json
@@ -28,7 +28,7 @@
       "ip": "172.16.32.8",
       "ip6": "2001:660:4406:200:1::8",
       "kavlan": false,
-      "mac": "b4:7a:f1:c1:42:hh",
+      "mac": "b4:7a:f1:c1:42:08",
       "mountable": true,
       "mounted": true,
       "network_address": "chuc-8.lille.grid5000.fr",
diff --git a/input/grid5000/sites/lille/clusters/chuc/chuc.yaml b/input/grid5000/sites/lille/clusters/chuc/chuc.yaml
index 7c6cd5ac738d253fc842b858eb98e281319256d6..b1b94dac16348f89359a87240c734236d2b935b2 100644
--- a/input/grid5000/sites/lille/clusters/chuc/chuc.yaml
+++ b/input/grid5000/sites/lille/clusters/chuc/chuc.yaml
@@ -70,7 +70,7 @@ nodes:
          mac: b4:7a:f1:c5:62:b3
          ip: 172.17.32.1
        eth0:
-         mac: b4:7a:f1:c1:42:aa
+         mac: b4:7a:f1:c1:42:01
          ip: 172.16.32.1
   chuc-2:
     network_adapters:
@@ -78,7 +78,7 @@ nodes:
          mac: b4:7a:f1:c5:62:3b
          ip: 172.17.32.2
        eth0:
-         mac: b4:7a:f1:c1:42:bb
+         mac: b4:7a:f1:c1:42:02
          ip: 172.16.32.2
   chuc-3:
     network_adapters:
@@ -86,7 +86,7 @@ nodes:
          mac: b4:7a:f1:c5:62:0d
          ip: 172.17.32.3
        eth0:
-         mac: b4:7a:f1:c5:62:cc
+         mac: b4:7a:f1:c5:62:03
          ip: 172.16.32.3
   chuc-4:
     network_adapters:
@@ -94,7 +94,7 @@ nodes:
          mac: b4:7a:f1:c5:62:1d
          ip: 172.17.32.4
        eth0:
-         mac: b4:7a:f1:c1:42:dd
+         mac: b4:7a:f1:c1:42:04
          ip: 172.16.32.4
   chuc-5:
     network_adapters:
@@ -102,7 +102,7 @@ nodes:
          mac: b4:7a:f1:be:90:d3
          ip: 172.17.32.5
        eth0:
-         mac: b4:7a:f1:c1:42:ee
+         mac: b4:7a:f1:c1:42:05
          ip: 172.16.32.5
   chuc-6:
     network_adapters:
@@ -110,7 +110,7 @@ nodes:
          mac: b4:7a:f1:c5:62:59
          ip: 172.17.32.6
        eth0:
-         mac: b4:7a:f1:c1:42:ff
+         mac: b4:7a:f1:c1:42:06
          ip: 172.16.32.6
   chuc-7:
     network_adapters:
@@ -118,7 +118,7 @@ nodes:
          mac: b4:7a:f1:c5:62:6b
          ip: 172.17.32.7
        eth0:
-         mac: b4:7a:f1:c1:42:gg
+         mac: b4:7a:f1:c1:42:07
          ip: 172.16.32.7
   chuc-8:
     network_adapters:
@@ -126,5 +126,5 @@ nodes:
          mac: b4:7a:f1:c0:2b:a1
          ip: 172.17.32.8
        eth0:
-         mac: b4:7a:f1:c1:42:hh
+         mac: b4:7a:f1:c1:42:08
          ip: 172.16.32.8