diff --git a/data/grid5000/sites/nancy/clusters/gros/nodes/gros-29.json b/data/grid5000/sites/nancy/clusters/gros/nodes/gros-29.json
index c83e9915f96104d025b6e9f2abc3cad54decac1f..23be464db82e072ffd411553baa6dc024e7fc418 100644
--- a/data/grid5000/sites/nancy/clusters/gros/nodes/gros-29.json
+++ b/data/grid5000/sites/nancy/clusters/gros/nodes/gros-29.json
@@ -74,7 +74,7 @@
       "ip": "172.16.66.29",
       "ip6": "2001:660:4406:500:3::1d",
       "kavlan": true,
-      "mac": "98:03:9b:b0:ac:ce",
+      "mac": "98:03:9b:87:d9:f6",
       "management": false,
       "model": "MT27710 Family [ConnectX-4 Lx]",
       "mountable": true,
@@ -94,7 +94,7 @@
       "firmware_version": "14.24.8000 (DEL2810000034)",
       "interface": "Ethernet",
       "kavlan": true,
-      "mac": "98:03:9b:b0:ac:cf",
+      "mac": "98:03:9b:87:d9:f7",
       "management": false,
       "model": "MT27710 Family [ConnectX-4 Lx]",
       "mountable": true,
diff --git a/input/grid5000/sites/nancy/clusters/gros/nodes/gros-29.yaml b/input/grid5000/sites/nancy/clusters/gros/nodes/gros-29.yaml
index a2fe83b7c8dfdc88c82577393f5edce88e729900..03114d2cb902e840d71f142b316688f29f990877 100644
--- a/input/grid5000/sites/nancy/clusters/gros/nodes/gros-29.yaml
+++ b/input/grid5000/sites/nancy/clusters/gros/nodes/gros-29.yaml
@@ -28,7 +28,7 @@ gros-29:
       firmware_version: 14.24.8000 (DEL2810000034)
       interface: Ethernet
       ip: 172.16.66.29
-      mac: 98:03:9b:b0:ac:ce
+      mac: 98:03:9b:87:d9:f6
       management: false
       model: MT27710 Family [ConnectX-4 Lx]
       name: eno1
@@ -38,7 +38,7 @@ gros-29:
       driver: mlx5_core
       firmware_version: 14.24.8000 (DEL2810000034)
       interface: Ethernet
-      mac: 98:03:9b:b0:ac:cf
+      mac: 98:03:9b:87:d9:f7
       management: false
       model: MT27710 Family [ConnectX-4 Lx]
       name: eno2