If not script file is setted we use the default from VPCS

gns3server/modules/vpcs/vpcs_vm.py

@@ -165,8 +165,15 @@ class VPCSVM(BaseVM):
     @property
     def startup_script(self):
         """Return the content of the current startup script"""
+
         if self._script_file is None:
-            return None
+            # If the default VPCS file exist we use it
+            path = os.path.join(self.working_dir, 'startup.vpc')
+            if os.path.exists(path):
+                self._script_file = path
+            else:
+                return None
+
         try:
             with open(self._script_file) as f:
                 return f.read()

tests/modules/vpcs/test_vpcs_vm.py

@@ -155,6 +155,20 @@ def test_get_startup_script(vm):
     assert vm.startup_script == content
 
 
+def test_get_startup_script_using_default_script(vm):
+    content = "echo GNS3 VPCS\nip 192.168.1.2\n"
+
+    # Reset script file location
+    vm.script_file = None
+
+    filepath = os.path.join(vm.working_dir, 'startup.vpc')
+    with open(filepath, 'w+') as f:
+        assert f.write(content)
+
+    assert vm.startup_script == content
+    assert vm.script_file == filepath
+
+
 def test_change_console_port(vm, port_manager):
     port1 = port_manager.get_free_console_port()
     port2 = port_manager.get_free_console_port()