diff --git a/data/grid5000/sites/nancy/clusters/griffon/nodes/griffon-11.json b/data/grid5000/sites/nancy/clusters/griffon/nodes/griffon-11.json
index 8175118728322f4a6497f31c8b2f1bc711ea1bfe..4b5b561c5b8181004f3446dd146d78d84c18f76b 100644
--- a/data/grid5000/sites/nancy/clusters/griffon/nodes/griffon-11.json
+++ b/data/grid5000/sites/nancy/clusters/griffon/nodes/griffon-11.json
@@ -64,15 +64,13 @@
       "bridged": false,
       "device": "eth2",
       "driver": "myri10ge",
-      "enabled": true,
+      "enabled": false,
       "interface": "Ethernet",
       "mac": "00:60:dd:46:84:b7",
       "management": false,
-      "mountable": true,
+      "mountable": false,
       "mounted": false,
       "rate": 10000000000,
-      "switch": "sgriffon1",
-      "switch_port": "Ten-GigabitEthernet1/1/1",
       "vendor": "myrinet",
       "version": "Myri-10G"
     },
diff --git a/data/grid5000/sites/nancy/clusters/griffon/nodes/griffon-12.json b/data/grid5000/sites/nancy/clusters/griffon/nodes/griffon-12.json
index eba6a589be830f25e88d2b17785472293ba0cbc8..9a2f65af0fef931e860003fd68fa3e0013046d7e 100644
--- a/data/grid5000/sites/nancy/clusters/griffon/nodes/griffon-12.json
+++ b/data/grid5000/sites/nancy/clusters/griffon/nodes/griffon-12.json
@@ -64,15 +64,13 @@
       "bridged": false,
       "device": "eth2",
       "driver": "myri10ge",
-      "enabled": true,
+      "enabled": false,
       "interface": "Ethernet",
       "mac": "00:60:dd:46:84:b9",
       "management": false,
-      "mountable": true,
+      "mountable": false,
       "mounted": false,
       "rate": 10000000000,
-      "switch": "sgriffon1",
-      "switch_port": "Ten-GigabitEthernet1/2/2",
       "vendor": "myrinet",
       "version": "Myri-10G"
     },
diff --git a/data/grid5000/sites/nancy/clusters/griffon/nodes/griffon-13.json b/data/grid5000/sites/nancy/clusters/griffon/nodes/griffon-13.json
index 221e340bc697960bc50f16db259678936ebc9812..9d024351fa7619f95abf3344e0a283dca972da9e 100644
--- a/data/grid5000/sites/nancy/clusters/griffon/nodes/griffon-13.json
+++ b/data/grid5000/sites/nancy/clusters/griffon/nodes/griffon-13.json
@@ -64,15 +64,13 @@
       "bridged": false,
       "device": "eth2",
       "driver": "myri10ge",
-      "enabled": true,
+      "enabled": false,
       "interface": "Ethernet",
       "mac": "00:60:dd:46:84:a8",
       "management": false,
-      "mountable": true,
+      "mountable": false,
       "mounted": false,
       "rate": 10000000000,
-      "switch": null,
-      "switch_port": null,
       "vendor": "myrinet",
       "version": "Myri-10G"
     },
diff --git a/data/grid5000/sites/nancy/clusters/griffon/nodes/griffon-14.json b/data/grid5000/sites/nancy/clusters/griffon/nodes/griffon-14.json
index 542dc77ca441bbf78c0efab0f3b7d9f958d61298..b5f72e6e665893ed3e5dc5088fa618c53744df28 100644
--- a/data/grid5000/sites/nancy/clusters/griffon/nodes/griffon-14.json
+++ b/data/grid5000/sites/nancy/clusters/griffon/nodes/griffon-14.json
@@ -64,15 +64,13 @@
       "bridged": false,
       "device": "eth2",
       "driver": "myri10ge",
-      "enabled": true,
+      "enabled": false,
       "interface": "Ethernet",
       "mac": "00:60:dd:46:84:b8",
       "management": false,
-      "mountable": true,
+      "mountable": false,
       "mounted": false,
       "rate": 10000000000,
-      "switch": null,
-      "switch_port": null,
       "vendor": "myrinet",
       "version": "Myri-10G"
     },
diff --git a/data/grid5000/sites/nancy/network_equipments/sgraoullyib.json b/data/grid5000/sites/nancy/network_equipments/sgraoullyib.json
new file mode 100644
index 0000000000000000000000000000000000000000..ac91a2f9271628ea420e7e8956fb58f8db7dddbc
--- /dev/null
+++ b/data/grid5000/sites/nancy/network_equipments/sgraoullyib.json
@@ -0,0 +1,108 @@
+{
+  "backplane_bps": null,
+  "channels": {
+    "naming_pattern": "Po%CHANNELID%"
+  },
+  "kind": "switch",
+  "linecards": [
+    {
+
+    },
+    {
+
+    },
+    {
+
+    },
+    {
+
+    },
+    {
+
+    },
+    {
+
+    },
+    {
+
+    },
+    {
+
+    },
+    {
+
+    },
+    {
+
+    },
+    {
+
+    },
+    {
+
+    },
+    {
+      "kind": "switch",
+      "naming_pattern": "%LINECARD%/%PORT%",
+      "ports": [
+        {
+
+        },
+        {
+
+        },
+        {
+
+        },
+        {
+
+        },
+        {
+
+        },
+        {
+
+        },
+        {
+
+        },
+        {
+
+        },
+        {
+
+        },
+        {
+
+        },
+        {
+
+        },
+        {
+
+        },
+        {
+          "kind": "switch",
+          "uid": "sgriffonib"
+        }
+      ],
+      "rate": 20000000000,
+      "snmp_pattern": "%LINECARD%/%PORT%"
+    }
+  ],
+  "model": "Infiniband",
+  "mtu": null,
+  "routes": {
+
+  },
+  "site": "nancy",
+  "snmp_community": "public",
+  "type": "network_equipment",
+  "uid": "sgraoullyib",
+  "vlans": {
+    "naming_pattern": "Vlan%VLANID%"
+  },
+  "weathermap": {
+    "use_cacti": "no"
+  }
+}
\ No newline at end of file
diff --git a/data/grid5000/sites/nancy/network_equipments/sgriffon1.json b/data/grid5000/sites/nancy/network_equipments/sgriffon1.json
index 320970113114a9404bb61e7920f61b703f2c6362..501da9169349263c288a0692002e8b5b4086d921 100644
--- a/data/grid5000/sites/nancy/network_equipments/sgriffon1.json
+++ b/data/grid5000/sites/nancy/network_equipments/sgriffon1.json
@@ -163,9 +163,7 @@
 
         },
         {
-          "kind": "node",
-          "port": "eth2",
-          "uid": "griffon-11"
+
         },
         {
           "kind": "switch",
@@ -174,24 +172,6 @@
       ],
       "rate": 10000000000,
       "snmp_pattern": "Ten-GigabitEthernet1/%LINECARD%/%PORT%"
-    },
-    {
-      "kind": "node",
-      "naming_pattern": "Ten-GigabitEthernet1/%LINECARD%/%PORT%",
-      "ports": [
-        {
-
-        },
-        {
-
-        },
-        {
-          "port": "eth2",
-          "uid": "griffon-12"
-        }
-      ],
-      "rate": 10000000000,
-      "snmp_pattern": "Ten-GigabitEthernet1/%LINECARD%/%PORT%"
     }
   ],
   "model": "3com 4500g",
diff --git a/generators/input/sites/nancy/clusters/griffon/griffon.rb b/generators/input/sites/nancy/clusters/griffon/griffon.rb
index daaa801a0e4cad311a6fd9ef2bdc717584b6c11f..53f8c0c58ad7283b09aea332a43c428d63805456 100644
--- a/generators/input/sites/nancy/clusters/griffon/griffon.rb
+++ b/generators/input/sites/nancy/clusters/griffon/griffon.rb
@@ -102,16 +102,14 @@ site :nancy do |site_uid|
           {
             :interface        => lookup('griffon_manual', node_uid, 'network_interfaces', 'eth2', 'interface'),
             :rate             => 10.G,
-            :enabled          => lookup('griffon_manual', node_uid, 'network_interfaces', 'eth2', 'enabled'),
+            :enabled          => false, # see bug 6490,
             :management       => lookup('griffon_manual', node_uid, 'network_interfaces', 'eth2', 'management'),
-            :mountable        => lookup('griffon_manual', node_uid, 'network_interfaces', 'eth2', 'mountable'),
-            :mounted          => lookup('griffon_manual', node_uid, 'network_interfaces', 'eth2', 'mounted'),
+            :mountable        => false, # see bug 6490,
+            :mounted          => false, # see bug 6490,
             :bridged          => false,
             :device           => "eth2",
             :vendor           => "myrinet",
             :version          => "Myri-10G",
-            :switch           => net_switch_lookup('nancy','griffon', node_uid, 'eth2'),
-            :switch_port      => net_port_lookup('nancy','griffon', node_uid, 'eth2'),
             :driver           => lookup('griffon_manual', node_uid, 'network_interfaces', 'eth2', 'driver'),
             :mac              => lookup('griffon_manual', node_uid, 'network_interfaces', 'eth2', 'mac')
           },
diff --git a/generators/input/sites/nancy/net-links/sgriffon1.yaml b/generators/input/sites/nancy/net-links/sgriffon1.yaml
index 0842fd71fc325bc1e65ad829bf77a91740670a99..f5a1fb4ff149135bbd70ee4e57b6e0a01192c1dd 100644
--- a/generators/input/sites/nancy/net-links/sgriffon1.yaml
+++ b/generators/input/sites/nancy/net-links/sgriffon1.yaml
@@ -70,22 +70,9 @@ sgriffon1:
       kind: other
       rate: 10000000000
       ports:
-        1:
-          uid: griffon-11
-          port: eth2
-          kind: node
         2: 
           uid: sgravillon1
           kind: switch
-    2:
-      naming_pattern: "Ten-GigabitEthernet1/%LINECARD%/%PORT%"
-      snmp_pattern: "Ten-GigabitEthernet1/%LINECARD%/%PORT%"
-      kind: node
-      rate: 10000000000
-      ports:
-        2:
-          uid: griffon-12
-          port: eth2
 
   channels:
     naming_pattern: Po%CHANNELID%