diff --git a/gns3server/modules/vpcs/adapters/__init__.py b/gns3server/modules/vpcs/adapters/__init__.py
new file mode 100644
index 00000000..e69de29b
diff --git a/gns3server/modules/vpcs/adapters/adapter.py b/gns3server/modules/vpcs/adapters/adapter.py
new file mode 100644
index 00000000..4d2f4053
--- /dev/null
+++ b/gns3server/modules/vpcs/adapters/adapter.py
@@ -0,0 +1,104 @@
+# -*- coding: utf-8 -*-
+#
+# Copyright (C) 2014 GNS3 Technologies Inc.
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+
+class Adapter(object):
+    """
+    Base class for adapters.
+
+    :param interfaces: number of interfaces supported by this adapter.
+    """
+
+    def __init__(self, interfaces=4):
+
+        self._interfaces = interfaces
+
+        self._ports = {}
+        for port_id in range(0, interfaces):
+            self._ports[port_id] = None
+
+    def removable(self):
+        """
+        Returns True if the adapter can be removed from a slot
+        and False if not.
+
+        :returns: boolean
+        """
+
+        return True
+
+    def port_exists(self, port_id):
+        """
+        Checks if a port exists on this adapter.
+
+        :returns: True is the port exists,
+        False otherwise.
+        """
+
+        if port_id in self._ports:
+            return True
+        return False
+
+    def add_nio(self, port_id, nio):
+        """
+        Adds a NIO to a port on this adapter.
+
+        :param port_id: port ID (integer)
+        :param nio: NIO instance
+        """
+
+        self._ports[port_id] = nio
+
+    def remove_nio(self, port_id):
+        """
+        Removes a NIO from a port on this adapter.
+
+        :param port_id: port ID (integer)
+        """
+
+        self._ports[port_id] = None
+
+    def get_nio(self, port_id):
+        """
+        Returns the NIO assigned to a port.
+
+        :params port_id: port ID (integer)
+
+        :returns: NIO instance
+        """
+
+        return self._ports[port_id]
+
+    @property
+    def ports(self):
+        """
+        Returns port to NIO mapping
+
+        :returns: dictionary port -> NIO
+        """
+
+        return self._ports
+
+    @property
+    def interfaces(self):
+        """
+        Returns the number of interfaces supported by this adapter.
+
+        :returns: number of interfaces
+        """
+
+        return self._interfaces
diff --git a/gns3server/modules/vpcs/adapters/ethernet_adapter.py b/gns3server/modules/vpcs/adapters/ethernet_adapter.py
new file mode 100644
index 00000000..bbca7f40
--- /dev/null
+++ b/gns3server/modules/vpcs/adapters/ethernet_adapter.py
@@ -0,0 +1,31 @@
+# -*- coding: utf-8 -*-
+#
+# Copyright (C) 2014 GNS3 Technologies Inc.
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+from .adapter import Adapter
+
+
+class EthernetAdapter(Adapter):
+    """
+    VPCS Ethernet adapter.
+    """
+
+    def __init__(self):
+        Adapter.__init__(self, interfaces=1)
+
+    def __str__(self):
+
+        return "VPCS Ethernet adapter"
diff --git a/gns3server/modules/vpcs/vpcs_device.py b/gns3server/modules/vpcs/vpcs_device.py
index 3bd3f95a..88f07f85 100644
--- a/gns3server/modules/vpcs/vpcs_device.py
+++ b/gns3server/modules/vpcs/vpcs_device.py
@@ -29,6 +29,7 @@ import threading
 import configparser
 from .vpcscon import start_vpcscon
 from .vpcs_error import VPCSError
+from .adapters.ethernet_adapter import EthernetAdapter
 from .nios.nio_udp import NIO_UDP
 from .nios.nio_tap import NIO_TAP
 
@@ -80,6 +81,8 @@ class VPCSDevice(object):
 
         # VPCS settings
         self._script_file = ""
+        self._ethernet_adapters = [EthernetAdapter()]  # one adapter = 1 interfaces
+        self._slots = self._ethernet_adapters
         
         # update the working directory
         self.working_dir = working_dir
@@ -437,9 +440,17 @@ class VPCSDevice(object):
 
         command = [self._path]
         command.extend(["-p", str(self._console)])
-        command.extend(["-s", str(self._lport)])
-        command.extend(["-c", str(self._rport)])
-        command.extend(["-t", str(self._rhost)])
+        
+        for adapter in self._slots:
+            for unit in adapter.ports.keys():
+                nio = adapter.get_nio(unit)
+                if nio:
+                    if isinstance(nio, NIO_UDP):
+                        # UDP tunnel
+                        command.extend(["-s", str(nio.lport)])
+                        command.extend(["-c", str(nio.rport)])
+                        command.extend(["-t", str(nio.rhost)])
+        
         command.extend(["-m", str(self._id)]) #The unique ID is used to set the mac address offset
         if self._script_file:
             command.extend([self._script_file])