diff --git a/data/grid5000/accesses/refrepo.json b/data/grid5000/accesses/refrepo.json
index 2e40f45efdea23a6d3274fa3ab35f4bf3d7153bc..f037c150e4fadca3c9162944feb6390cb4e7e187 100644
--- a/data/grid5000/accesses/refrepo.json
+++ b/data/grid5000/accesses/refrepo.json
@@ -3961,11 +3961,11 @@
                   "driver": "hfi1",
                   "enabled": true,
                   "firmware_version": "1.27.0",
-                  "guid": "0x0011750101711f55",
+                  "guid": "0x0011750901c47acb",
                   "interface": "Omni-Path",
                   "ip": "172.18.20.27",
                   "kavlan": false,
-                  "mac": "00:11:75:01:01:71:1f:55",
+                  "mac": "00:11:75:09:01:c4:7a:cb",
                   "management": false,
                   "model": "Omni-Path HFI Silicon 100 Series [discrete]",
                   "mountable": true,
diff --git a/data/grid5000/sites/grenoble/clusters/dahu/nodes/dahu-27.json b/data/grid5000/sites/grenoble/clusters/dahu/nodes/dahu-27.json
index 30ae3942f8af879541b7ff13d319b6cdf7d98eaf..19b6d783705f4ab2d1531a11028c4d21ef5d5f86 100644
--- a/data/grid5000/sites/grenoble/clusters/dahu/nodes/dahu-27.json
+++ b/data/grid5000/sites/grenoble/clusters/dahu/nodes/dahu-27.json
@@ -181,11 +181,11 @@
       "driver": "hfi1",
       "enabled": true,
       "firmware_version": "1.27.0",
-      "guid": "0x0011750101711f55",
+      "guid": "0x0011750901c47acb",
       "interface": "Omni-Path",
       "ip": "172.18.20.27",
       "kavlan": false,
-      "mac": "00:11:75:01:01:71:1f:55",
+      "mac": "00:11:75:09:01:c4:7a:cb",
       "management": false,
       "model": "Omni-Path HFI Silicon 100 Series [discrete]",
       "mountable": true,
diff --git a/input/grid5000/sites/grenoble/clusters/dahu/nodes/dahu-27.yaml b/input/grid5000/sites/grenoble/clusters/dahu/nodes/dahu-27.yaml
index 4eb911001d0aeb27e632247854699b4c9dbeef0b..953267a3c1be91327e98c88fd63ca7df70f2aca8 100644
--- a/input/grid5000/sites/grenoble/clusters/dahu/nodes/dahu-27.yaml
+++ b/input/grid5000/sites/grenoble/clusters/dahu/nodes/dahu-27.yaml
@@ -87,10 +87,10 @@ dahu-27:
     ib0:
       driver: hfi1
       firmware_version: 1.27.0
-      guid: '0x0011750101711f55'
+      guid: '0x0011750901c47acb'
       interface: Omni-Path
       ip: 172.18.20.27
-      mac: 00:11:75:01:01:71:1f:55
+      mac: 00:11:75:09:01:c4:7a:cb
       management: false
       model: Omni-Path HFI Silicon 100 Series [discrete]
       name: ib0