diff --git a/gns3server/modules/dynamips/__init__.py b/gns3server/modules/dynamips/__init__.py
index 49446172..4be683e0 100644
--- a/gns3server/modules/dynamips/__init__.py
+++ b/gns3server/modules/dynamips/__init__.py
@@ -171,8 +171,11 @@ class Dynamips(BaseManager):
         files = glob.glob(os.path.join(project_dir, "*.ghost"))
         files += glob.glob(os.path.join(project_dir, "*_lock"))
         files += glob.glob(os.path.join(project_dir, "ilt_*"))
-        files += glob.glob(os.path.join(project_dir, "c[0-9][0-9][0-9][0-9]_*_rommon_vars"))
-        files += glob.glob(os.path.join(project_dir, "c[0-9][0-9][0-9][0-9]_*_ssa"))
+        files += glob.glob(os.path.join(project_dir, "c[0-9][0-9][0-9][0-9]_i[0-9]*_rommon_vars"))
+        files += glob.glob(os.path.join(project_dir, "c[0-9][0-9][0-9][0-9]_i[0-9]*_ssa"))
+        files += glob.glob(os.path.join(project_dir, "c[0-9][0-9][0-9][0-9]_i[0-9]*_log.txt"))
+        files += glob.glob(os.path.join(project_dir, "c[0-9][0-9][0-9][0-9]_i[0-9]*_rom"))
+        files += glob.glob(os.path.join(project_dir, "c[0-9][0-9][0-9][0-9]_i[0-9]*_bootflash"))
         for file in files:
             try:
                 log.debug("Deleting file {}".format(file))
diff --git a/gns3server/modules/dynamips/nodes/router.py b/gns3server/modules/dynamips/nodes/router.py
index e58d516b..4954d698 100644
--- a/gns3server/modules/dynamips/nodes/router.py
+++ b/gns3server/modules/dynamips/nodes/router.py
@@ -87,6 +87,7 @@ class Router(BaseVM):
             self._exec_area = 64  # 64 MB on other systems
         self._disk0 = 0  # Megabytes
         self._disk1 = 0  # Megabytes
+        self._auto_delete_disks = False
         self._aux = aux
         self._mac_addr = ""
         self._system_id = "FTX0945W0MY"  # processor board ID in IOS
@@ -145,6 +146,7 @@ class Router(BaseVM):
                        "exec_area": self._exec_area,
                        "disk0": self._disk0,
                        "disk1": self._disk1,
+                       "auto_delete_disks": self._auto_delete_disks,
                        "console": self._console,
                        "aux": self._aux,
                        "mac_addr": self._mac_addr,
@@ -182,6 +184,16 @@ class Router(BaseVM):
     @asyncio.coroutine
     def create(self):
 
+        # delete any previous file with same Dynamips identifier
+        project_dir = os.path.join(self.project.module_working_directory(self.manager.module_name.lower()))
+        for file in glob.glob(os.path.join(project_dir, "c[0-9][0-9][0-9][0-9]_i{}_*".format(self._dynamips_id))):
+            try:
+                log.debug("Deleting file {}".format(file))
+                yield from wait_run_in_executor(os.remove, file)
+            except OSError as e:
+                log.warn("Could not delete file {}: {}".format(file, e))
+                continue
+
         if not self._hypervisor:
             module_workdir = self.project.module_working_directory(self.manager.module_name.lower())
             self._hypervisor = yield from self.manager.start_new_hypervisor(working_dir=module_workdir)
@@ -342,6 +354,20 @@ class Router(BaseVM):
                 pass
             yield from self.hypervisor.stop()
 
+        if self._auto_delete_disks:
+            # delete nvram and disk files
+            project_dir = os.path.join(self.project.module_working_directory(self.manager.module_name.lower()))
+            files = glob.glob(os.path.join(project_dir, "{}_i{}_disk[0-1]".format(self.platform, self.dynamips_id)))
+            files += glob.glob(os.path.join(project_dir, "{}_i{}_slot[0-1]".format(self.platform, self.dynamips_id)))
+            files += glob.glob(os.path.join(project_dir, "{}_i{}_nvram".format(self.platform, self.dynamips_id)))
+            files += glob.glob(os.path.join(project_dir, "{}_i{}_flash[0-1]".format(self.platform, self.dynamips_id)))
+            for file in files:
+                try:
+                    log.debug("Deleting file {}".format(file))
+                    yield from wait_run_in_executor(os.remove, file)
+                except OSError as e:
+                    log.warn("Could not delete file {}: {}".format(file, e))
+                    continue
         self._closed = True
 
     @property
@@ -851,6 +877,30 @@ class Router(BaseVM):
                                                                                                     new_disk1=disk1))
         self._disk1 = disk1
 
+    @property
+    def auto_delete_disks(self):
+        """
+        Returns True if auto delete disks is enabled on this router.
+
+        :returns: boolean either auto delete disks is activated or not
+        """
+
+        return self._auto_delete_disks
+
+    @asyncio.coroutine
+    def set_auto_delete_disks(self, auto_delete_disks):
+        """
+        Enable/disable use of auto delete disks
+
+        :param auto_delete_disks: activate/deactivate auto delete disks (boolean)
+        """
+
+        if auto_delete_disks:
+            log.info('Router "{name}" [{id}]: auto delete disks enabled'.format(name=self._name, id=self._id))
+        else:
+            log.info('Router "{name}" [{id}]: auto delete disks disabled'.format(name=self._name, id=self._id))
+        self._auto_delete_disks = auto_delete_disks
+
     @asyncio.coroutine
     def set_console(self, console):
         """
diff --git a/gns3server/schemas/dynamips_vm.py b/gns3server/schemas/dynamips_vm.py
index 2d5de5b9..cbc4243d 100644
--- a/gns3server/schemas/dynamips_vm.py
+++ b/gns3server/schemas/dynamips_vm.py
@@ -120,6 +120,10 @@ VM_CREATE_SCHEMA = {
             "description": "disk1 size in MB",
             "type": "integer"
         },
+        "auto_delete_disks": {
+            "description": "automatically delete nvram and disk files",
+            "type": "boolean"
+        },
         "console": {
             "description": "console TCP port",
             "type": "integer",
@@ -337,6 +341,10 @@ VM_UPDATE_SCHEMA = {
             "description": "disk1 size in MB",
             "type": "integer"
         },
+        "auto_delete_disks": {
+            "description": "automatically delete nvram and disk files",
+            "type": "boolean"
+        },
         "console": {
             "description": "console TCP port",
             "type": "integer",
@@ -591,6 +599,10 @@ VM_OBJECT_SCHEMA = {
             "description": "disk1 size in MB",
             "type": "integer"
         },
+        "auto_delete_disks": {
+            "description": "automatically delete nvram and disk files",
+            "type": "boolean"
+        },
         "console": {
             "description": "console TCP port",
             "type": "integer",