[mercantour6] define network

data/grid5000/sites/sophia/clusters/mercantour6/nodes/mercantour6-1.json

@@ -131,8 +131,8 @@
       "rate": 1000000000,
       "sriov": false,
       "sriov_totalvfs": 0,
-      "switch": null,
-      "switch_port": null,
+      "switch": "sw-3",
+      "switch_port": "1/1/17",
       "vendor": "Broadcom Inc. and subsidiaries"
     },
     {