try

Author: Mikej81

dist/terraform/latest/bigiq_cluster.json

@@ -130,6 +130,12 @@
             "allowService": "default",
             "trafficGroup": "traffic-group-local-only"
         },
+        "default": {
+            "class": "Route",
+            "gw": "${externalGateway}",
+            "network": "default",
+            "mtu": 1500
+        },
         "vdms": {
             "class": "Route",
             "gw": "${internalGateway}",

dist/terraform/latest/byol_cluster.json

@@ -121,6 +121,12 @@
             "allowService": "default",
             "trafficGroup": "traffic-group-local-only"
         },
+        "default": {
+            "class": "Route",
+            "gw": "${externalGateway}",
+            "network": "default",
+            "mtu": 1500
+        },
         "vdms": {
             "class": "Route",
             "gw": "${internalGateway}",