diff --git a/data/grid5000/sites/rennes/clusters/roazhon13/nodes/roazhon13-3.json b/data/grid5000/sites/rennes/clusters/roazhon13/nodes/roazhon13-3.json
index 48265ea03d0e53356d595c92e6161356721c91f4..cb1c5b4637eb51d9fba18e2e16c673373269d4df 100644
--- a/data/grid5000/sites/rennes/clusters/roazhon13/nodes/roazhon13-3.json
+++ b/data/grid5000/sites/rennes/clusters/roazhon13/nodes/roazhon13-3.json
@@ -37,7 +37,7 @@
       "ip": "172.16.110.47",
       "ip6": "2001:660:4406:700:f::2f",
       "kavlan": false,
-      "mac": "3c:fd:fe:74:ee:01",
+      "mac": "3c:fd:fe:74:6c:70",
       "mountable": true,
       "mounted": true,
       "name": "enp24s0f0",
diff --git a/data/grid5000/sites/rennes/clusters/roazhon13/nodes/roazhon13-4.json b/data/grid5000/sites/rennes/clusters/roazhon13/nodes/roazhon13-4.json
index 6a44c1582fff935003512aefd20f8b350ea41982..5be883233657fa972f4e94abf7580eb7ec685c03 100644
--- a/data/grid5000/sites/rennes/clusters/roazhon13/nodes/roazhon13-4.json
+++ b/data/grid5000/sites/rennes/clusters/roazhon13/nodes/roazhon13-4.json
@@ -37,7 +37,7 @@
       "ip": "172.16.110.48",
       "ip6": "2001:660:4406:700:f::30",
       "kavlan": false,
-      "mac": "3c:fd:fe:74:ee:02",
+      "mac": "3c:fd:fe:74:6b:c8",
       "mountable": true,
       "mounted": true,
       "name": "enp24s0f0",
diff --git a/input/grid5000/sites/rennes/clusters/roazhon13/roazhon13_ip.yaml.erb b/input/grid5000/sites/rennes/clusters/roazhon13/roazhon13_ip.yaml.erb
index 88edabc537597d47a7873a0fe45f8a0525bb7a35..7843605d3f0a1a76195a8cd7274d32b1ca6349b0 100644
--- a/input/grid5000/sites/rennes/clusters/roazhon13/roazhon13_ip.yaml.erb
+++ b/input/grid5000/sites/rennes/clusters/roazhon13/roazhon13_ip.yaml.erb
@@ -7,8 +7,8 @@ nodes:
         mac: <%= %w(
 3c:fd:fe:74:78:90
 3c:fd:fe:74:ee:00
-3c:fd:fe:74:ee:01
-3c:fd:fe:74:ee:02
+3c:fd:fe:74:6c:70
+3c:fd:fe:74:6b:c8
 3c:fd:fe:74:ee:70
 3c:fd:fe:74:6d:30
 3c:fd:fe:74:d1:90