diff --git a/data/grid5000/accesses/refrepo.json b/data/grid5000/accesses/refrepo.json
index 9deb72141897d7fab7fba3f3f94d8cee253ab1d4..22442075f58e1916f850fcc14871aa965b16246f 100644
--- a/data/grid5000/accesses/refrepo.json
+++ b/data/grid5000/accesses/refrepo.json
@@ -1537,11 +1537,11 @@
                   "driver": "hfi1",
                   "enabled": true,
                   "firmware_version": "1.27.0",
-                  "guid": "0x0011750101716799",
+                  "guid": "0x0011750901c4709b",
                   "interface": "Omni-Path",
                   "ip": "172.18.20.16",
                   "kavlan": false,
-                  "mac": "00:11:75:01:01:71:67:99",
+                  "mac": "00:11:75:09:01:c4:70:9b",
                   "management": false,
                   "model": "Omni-Path HFI Silicon 100 Series [discrete]",
                   "mountable": true,
diff --git a/data/grid5000/sites/grenoble/clusters/dahu/nodes/dahu-16.json b/data/grid5000/sites/grenoble/clusters/dahu/nodes/dahu-16.json
index 6ee2d00c3c245e1b250f635d37ad3657c94df83e..aa1eae9aba5ab4df83b6635600652f1b653f5314 100644
--- a/data/grid5000/sites/grenoble/clusters/dahu/nodes/dahu-16.json
+++ b/data/grid5000/sites/grenoble/clusters/dahu/nodes/dahu-16.json
@@ -181,11 +181,11 @@
       "driver": "hfi1",
       "enabled": true,
       "firmware_version": "1.27.0",
-      "guid": "0x0011750101716799",
+      "guid": "0x0011750901c4709b",
       "interface": "Omni-Path",
       "ip": "172.18.20.16",
       "kavlan": false,
-      "mac": "00:11:75:01:01:71:67:99",
+      "mac": "00:11:75:09:01:c4:70:9b",
       "management": false,
       "model": "Omni-Path HFI Silicon 100 Series [discrete]",
       "mountable": true,
diff --git a/input/grid5000/sites/grenoble/clusters/dahu/nodes/dahu-16.yaml b/input/grid5000/sites/grenoble/clusters/dahu/nodes/dahu-16.yaml
index 3d0feeec387ae6e95ee9c30645dcdde245f35f78..c9e764493acc620b597f82d0da2ca503c8aa8230 100644
--- a/input/grid5000/sites/grenoble/clusters/dahu/nodes/dahu-16.yaml
+++ b/input/grid5000/sites/grenoble/clusters/dahu/nodes/dahu-16.yaml
@@ -87,10 +87,10 @@ dahu-16:
     ib0:
       driver: hfi1
       firmware_version: 1.27.0
-      guid: '0x0011750101716799'
+      guid: '0x0011750901c4709b'
       interface: Omni-Path
       ip: 172.18.20.16
-      mac: 00:11:75:01:01:71:67:99
+      mac: 00:11:75:09:01:c4:70:9b
       management: false
       model: Omni-Path HFI Silicon 100 Series [discrete]
       name: ib0