diff --git a/gns3server/modules/dynamips/__init__.py b/gns3server/modules/dynamips/__init__.py
index 324be5b2..d4ae2030 100644
--- a/gns3server/modules/dynamips/__init__.py
+++ b/gns3server/modules/dynamips/__init__.py
@@ -20,6 +20,7 @@ Dynamips server module.
 """
 
 import os
+import base64
 import tempfile
 from gns3server.modules import IModule
 import gns3server.jsonrpc as jsonrpc
@@ -362,6 +363,35 @@ class Dynamips(IModule):
             router.ghost_status = 2
             router.ghost_file = ghost_instance
 
+    def save_base64config(self, config_base64, router, config_filename):
+        """
+        Saves a base64 encoded config (decoded) to a file.
+
+        :param config_base64: base64 encoded config
+        :param router: router instance
+        :param config_filename: file name to save the config
+
+        :returns: relative path to the config file
+        """
+
+        config = base64.decodestring(config_base64.encode("utf-8")).decode("utf-8")
+        config = "!\n" + config.replace("\r", "")
+        config = config.replace('%h', router.name)
+        config_dir = os.path.join(router.hypervisor.working_dir, "configs")
+        if not os.path.exists(config_dir):
+            try:
+                os.makedirs(config_dir)
+            except EnvironmentError as e:
+                raise DynamipsError("Could not create configs directory: {}".format(e))
+        config_path = os.path.join(config_dir, config_filename)
+        try:
+            with open(config_path, "w") as f:
+                log.info("saving startup-config to {}".format(config_path))
+                f.write(config)
+        except EnvironmentError as e:
+            raise DynamipsError("Could not save the configuration {}: {}".format(config_path, e))
+        return "configs" + os.sep + os.path.basename(config_path)
+
     @IModule.route("dynamips.nio.get_interfaces")
     def nio_get_interfaces(self, request):
         """
diff --git a/gns3server/modules/dynamips/backends/vm.py b/gns3server/modules/dynamips/backends/vm.py
index 2b237cf0..df9f57ab 100644
--- a/gns3server/modules/dynamips/backends/vm.py
+++ b/gns3server/modules/dynamips/backends/vm.py
@@ -101,6 +101,7 @@ class VM(object):
         - console (console port number)
         - aux (auxiliary console port number)
         - mac_addr (MAC address)
+        - chassis (router chassis model)
 
         Response parameters:
         - id (vm identifier)
@@ -123,6 +124,9 @@ class VM(object):
         image = request["image"]
         ram = request["ram"]
         hypervisor = None
+        chassis = None
+        if "chassis" in request:
+            chassis = request["chassis"]
 
         try:
 
@@ -131,7 +135,10 @@ class VM(object):
 
             hypervisor = self._hypervisor_manager.allocate_hypervisor_for_router(image, ram)
 
-            router = PLATFORMS[platform](hypervisor, name)
+            if chassis:
+                router = PLATFORMS[platform](hypervisor, name, chassis=chassis)
+            else:
+                router = PLATFORMS[platform](hypervisor, name)
             router.ram = ram
             router.image = image
             router.sparsemem = self._hypervisor_manager.sparse_memory_support
@@ -341,6 +348,7 @@ class VM(object):
         Optional request parameters:
         - any setting to update
         - startup_config_base64 (startup-config base64 encoded)
+        - private_config_base64 (private-config base64 encoded)
 
         Response parameters:
         - same as original request
@@ -360,25 +368,18 @@ class VM(object):
         try:
             # a new startup-config has been pushed
             if "startup_config_base64" in request:
-                config = base64.decodestring(request["startup_config_base64"].encode("utf-8")).decode("utf-8")
-                config = "!\n" + config.replace("\r", "")
-                config = config.replace('%h', router.name)
-                config_dir = os.path.join(router.hypervisor.working_dir, "configs")
-                if not os.path.exists(config_dir):
-                    try:
-                        os.makedirs(config_dir)
-                    except EnvironmentError as e:
-                        raise DynamipsError("Could not create configs directory: {}".format(e))
-                config_path = os.path.join(config_dir, "{}.cfg".format(router.name))
-                try:
-                    with open(config_path, "w") as f:
-                        log.info("saving startup-config to {}".format(config_path))
-                        f.write(config)
-                except EnvironmentError as e:
-                    raise DynamipsError("Could not save the configuration {}: {}".format(config_path, e))
-                request["startup_config"] = "configs" + os.sep + os.path.basename(config_path)
+                config_filename = "{}.cfg".format(router.name)
+                request["startup_config"] = self.save_base64config(request["startup_config_base64"], router, config_filename)
             if "startup_config" in request:
                 router.set_config(request["startup_config"])
+
+            # a new private-config has been pushed
+            if "private_config_base64" in request:
+                config_filename = "{}-private.cfg".format(router.name)
+                request["private_config"] = self.save_base64config(request["private_config_base64"], router, config_filename)
+            if "private_config" in request:
+                router.set_config(router.startup_config, request["private_config"])
+
         except DynamipsError as e:
             self.send_custom_error(str(e))
             return
@@ -455,9 +456,9 @@ class VM(object):
         router_id = request["id"]
         router = self._routers[router_id]
         try:
-            if router.startup_config:
-                #TODO: handle private-config
-                startup_config_base64, _ = router.extract_config()
+            if router.startup_config or router.private_config:
+
+                startup_config_base64, private_config_base64 = router.extract_config()
                 if startup_config_base64:
                     try:
                         config = base64.decodestring(startup_config_base64.encode("utf-8")).decode("utf-8")
@@ -467,7 +468,19 @@ class VM(object):
                             log.info("saving startup-config to {}".format(router.startup_config))
                             f.write(config)
                     except EnvironmentError as e:
-                        raise DynamipsError("Could not save the configuration {}: {}".format(config_path, e))
+                        raise DynamipsError("Could not save the startup configuration {}: {}".format(config_path, e))
+
+                if private_config_base64:
+                    try:
+                        config = base64.decodestring(private_config_base64.encode("utf-8")).decode("utf-8")
+                        config = "!\n" + config.replace("\r", "")
+                        config_path = os.path.join(router.hypervisor.working_dir, router.private_config)
+                        with open(config_path, "w") as f:
+                            log.info("saving private-config to {}".format(router.private_config))
+                            f.write(config)
+                    except EnvironmentError as e:
+                        raise DynamipsError("Could not save the private configuration {}: {}".format(config_path, e))
+
         except DynamipsError as e:
             log.warn("could not save config to {}: {}".format(router.startup_config, e))
 
diff --git a/gns3server/modules/dynamips/nodes/c7200.py b/gns3server/modules/dynamips/nodes/c7200.py
index e83a0b48..0307eedc 100644
--- a/gns3server/modules/dynamips/nodes/c7200.py
+++ b/gns3server/modules/dynamips/nodes/c7200.py
@@ -86,7 +86,9 @@ class C7200(Router):
                              "disk1": self._disk1,
                              "npe": self._npe,
                              "midplane": self._midplane,
-                             "clock_divisor": self._clock_divisor}
+                             "clock_divisor": self._clock_divisor,
+                             "sensors": self._sensors,
+                             "power_supplies": self._power_supplies}
 
         # update the router defaults with the platform specific defaults
         router_defaults.update(platform_defaults)
@@ -230,3 +232,17 @@ class C7200(Router):
             power_supply_id += 1
 
         self._power_supplies = power_supplies
+
+    def start(self):
+        """
+        Starts this router.
+        At least the IOS image must be set before starting it.
+        """
+
+        # trick: we must send sensors and power supplies info after starting the router
+        # otherwise they are not taken into account (Dynamips bug?)
+        Router.start(self)
+        if self._sensors != [22, 22, 22, 22]:
+            self.sensors = self._sensors
+        if self._power_supplies != [1, 1]:
+            self.power_supplies = self._power_supplies
diff --git a/gns3server/modules/dynamips/nodes/router.py b/gns3server/modules/dynamips/nodes/router.py
index aac9a04d..2c50c747 100644
--- a/gns3server/modules/dynamips/nodes/router.py
+++ b/gns3server/modules/dynamips/nodes/router.py
@@ -452,11 +452,15 @@ class Router(object):
                                                                                            id=self._id,
                                                                                            startup='"' + startup_config + '"'))
 
+            self._startup_config = startup_config
+
             if private_config:
                 log.info("router {name} [id={id}]: has a private-config set: {private}".format(name=self._name,
                                                                                                id=self._id,
                                                                                                private='"' + private_config + '"'))
 
+                self._private_config = private_config
+
     def extract_config(self):
         """
         Gets the contents of the config files
@@ -1180,9 +1184,9 @@ class Router(object):
 
         # Generate an OIR event if the router is running and
         # only for c7200, c3600 and c3745 (NM-4T only)
-        if self.is_running() and self._platform == 'c7200' \
+        if self.is_running() and (self._platform == 'c7200' \
         or (self._platform == 'c3600' and self.chassis == '3660') \
-        or (self._platform == 'c3745' and adapter == 'NM-4T'):
+        or (self._platform == 'c3745' and adapter == 'NM-4T')):
 
             self._hypervisor.send("vm slot_oir_start {name} {slot_id} 0".format(name=self._name,
                                                                                 slot_id=slot_id))
@@ -1212,9 +1216,9 @@ class Router(object):
 
         # Generate an OIR event if the router is running and
         # only for c7200, c3600 and c3745 (NM-4T only)
-        if self.is_running() and self._platform == 'c7200' \
+        if self.is_running() and (self._platform == 'c7200' \
         or (self._platform == 'c3600' and self.chassis == '3660') \
-        or (self._platform == 'c3745' and adapter == 'NM-4T'):
+        or (self._platform == 'c3745' and adapter == 'NM-4T')):
 
             self._hypervisor.send("vm slot_oir_stop {name} {slot_id} 0".format(name=self._name,
                                                                                slot_id=slot_id))