diff --git a/data/grid5000/sites/nancy/clusters/grisou/nodes/grisou-16.json b/data/grid5000/sites/nancy/clusters/grisou/nodes/grisou-16.json
index c9f47e85d49632d7b6d4a576680b48eb14306175..69fe798753b08d21220c2b9edf399160abdbe064 100644
--- a/data/grid5000/sites/nancy/clusters/grisou/nodes/grisou-16.json
+++ b/data/grid5000/sites/nancy/clusters/grisou/nodes/grisou-16.json
@@ -128,7 +128,7 @@
       "interface": "Ethernet",
       "ip": "172.16.72.16",
       "kavlan": true,
-      "mac": "24:6e:96:03:0f:88",
+      "mac": "e4:43:4b:5a:e6:38",
       "management": false,
       "model": "82599ES 10-Gigabit SFI/SFP+ Network Connection",
       "mountable": true,
@@ -148,7 +148,7 @@
       "firmware_version": "0x8000095c",
       "interface": "Ethernet",
       "kavlan": true,
-      "mac": "24:6e:96:03:0f:8a",
+      "mac": "e4:43:4b:5a:e6:3a",
       "management": false,
       "model": "82599ES 10-Gigabit SFI/SFP+ Network Connection",
       "mountable": true,
@@ -168,7 +168,7 @@
       "firmware_version": "0x8000095d",
       "interface": "Ethernet",
       "kavlan": true,
-      "mac": "a0:36:9f:7e:4b:8c",
+      "mac": "b4:96:91:57:34:a4",
       "management": false,
       "model": "Ethernet 10G 2P X520 Adapter",
       "mountable": true,
@@ -188,7 +188,7 @@
       "firmware_version": "0x8000095d",
       "interface": "Ethernet",
       "kavlan": true,
-      "mac": "a0:36:9f:7e:4b:8e",
+      "mac": "b4:96:91:57:34:a6",
       "management": false,
       "model": "Ethernet 10G 2P X520 Adapter",
       "mountable": true,
@@ -208,7 +208,7 @@
       "firmware_version": "1.67, 0x80000fab, 18.8.9",
       "interface": "Ethernet",
       "kavlan": true,
-      "mac": "24:6e:96:03:0f:8c",
+      "mac": "e4:43:4b:5a:e6:3c",
       "management": false,
       "model": "I350 Gigabit Network Connection",
       "mountable": true,
@@ -228,7 +228,7 @@
       "firmware_version": "1.67, 0x80000fab, 18.8.9",
       "interface": "Ethernet",
       "kavlan": false,
-      "mac": "24:6e:96:03:0f:8d",
+      "mac": "e4:43:4b:5a:e6:3d",
       "management": false,
       "model": "I350 Gigabit Network Connection",
       "mountable": false,
diff --git a/input/grid5000/sites/nancy/clusters/grisou/grisou.yaml.erb b/input/grid5000/sites/nancy/clusters/grisou/grisou.yaml.erb
index 7ccbcbbc0b2b0e35f6ecebb3c461e7bbb0e61f8e..4690c9568829c663fb660bc73bc2ef61d789eac9 100644
--- a/input/grid5000/sites/nancy/clusters/grisou/grisou.yaml.erb
+++ b/input/grid5000/sites/nancy/clusters/grisou/grisou.yaml.erb
@@ -21,7 +21,7 @@ nodes:
                     24:6e:96:03:11:90
                     24:6e:96:02:a3:e0
                     24:6e:96:02:9f:08
-                    24:6e:96:03:0f:88
+                    e4:43:4b:5a:e6:38
                     24:6e:96:02:a1:50
                     24:6e:96:03:0e:90
                     24:6e:96:03:0f:a0
diff --git a/input/grid5000/sites/nancy/clusters/grisou/nodes/grisou-16.yaml b/input/grid5000/sites/nancy/clusters/grisou/nodes/grisou-16.yaml
index c6685977e7c9248f41dab8761bb2b69caa2a373d..7e22463d7ab60d1f383c28f305d0b996cff705ac 100644
--- a/input/grid5000/sites/nancy/clusters/grisou/nodes/grisou-16.yaml
+++ b/input/grid5000/sites/nancy/clusters/grisou/nodes/grisou-16.yaml
@@ -26,7 +26,7 @@ grisou-16:
       firmware_version: '0x8000095c'
       interface: Ethernet
       ip: 172.16.72.16
-      mac: 24:6e:96:03:0f:88
+      mac: e4:43:4b:5a:e6:38
       management: false
       model: 82599ES 10-Gigabit SFI/SFP+ Network Connection
       name: eno1
@@ -36,7 +36,7 @@ grisou-16:
       driver: ixgbe
       firmware_version: '0x8000095c'
       interface: Ethernet
-      mac: 24:6e:96:03:0f:8a
+      mac: e4:43:4b:5a:e6:3a
       management: false
       model: 82599ES 10-Gigabit SFI/SFP+ Network Connection
       name: eno2
@@ -46,7 +46,7 @@ grisou-16:
       driver: ixgbe
       firmware_version: '0x8000095d'
       interface: Ethernet
-      mac: a0:36:9f:7e:4b:8c
+      mac: b4:96:91:57:34:a4
       management: false
       model: Ethernet 10G 2P X520 Adapter
       name: enp3s0f0
@@ -56,7 +56,7 @@ grisou-16:
       driver: ixgbe
       firmware_version: '0x8000095d'
       interface: Ethernet
-      mac: a0:36:9f:7e:4b:8e
+      mac: b4:96:91:57:34:a6
       management: false
       model: Ethernet 10G 2P X520 Adapter
       name: enp3s0f1
@@ -66,7 +66,7 @@ grisou-16:
       driver: igb
       firmware_version: 1.67, 0x80000fab, 18.8.9
       interface: Ethernet
-      mac: 24:6e:96:03:0f:8c
+      mac: e4:43:4b:5a:e6:3c
       management: false
       model: I350 Gigabit Network Connection
       name: eno3
@@ -76,7 +76,7 @@ grisou-16:
       driver: igb
       firmware_version: 1.67, 0x80000fab, 18.8.9
       interface: Ethernet
-      mac: 24:6e:96:03:0f:8d
+      mac: e4:43:4b:5a:e6:3d
       management: false
       model: I350 Gigabit Network Connection
       name: eno4