diff --git a/model/ccnx-interface.h b/model/ccnx-interface.h
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+/* -*- Mode: C++; c-file-style: "gnu"; indent-tabs-mode:nil; -*- */
+/*
+ * Copyright (c) 2005,2006,2007 INRIA
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation;
+ *
+ * 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, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ * Authors: 
+ */
+#ifndef CCNX_INTERFACE_H
+#define CCNX_INTERFACE_H
+
+#include <list>
+#include "ns3/ptr.h"
+#include "ns3/object.h"
+
+namespace ns3 {
+
+class NetDevice;
+class Packet;
+class Node;
+
+/**
+ * \brief The Ccnx representation of a network interface
+ *
+ * This class roughly corresponds to the struct in_device
+ * of Linux; the main purpose is to provide address-family
+ * specific information (addresses) about an interface.
+ *
+ * By default, Ccnx interface are created in the "down" state
+ * no IP addresses.  Before becoming useable, the user must 
+ * add an address of some type and invoke Setup on them.
+ */
+class CcnxInterface  : public Object
+{
+public:
+  static TypeId GetTypeId (void);
+
+  CcnxInterface ();
+  virtual ~CcnxInterface();
+
+  void SetNode (Ptr<Node> node); 
+  void SetDevice (Ptr<NetDevice> device);
+
+  /**
+   * \returns the underlying NetDevice. This method cannot return zero.
+   */
+  Ptr<NetDevice> GetDevice (void) const;
+
+  /**
+   * \param metric configured routing metric (cost) of this interface
+   *
+   * Note:  This is synonymous to the Metric value that ifconfig prints
+   * out.  It is used by ns-3 global routing, but other routing daemons
+   * choose to ignore it. 
+   */
+  void SetMetric (uint16_t metric);
+
+  /**
+   * \returns configured routing metric (cost) of this interface
+   *
+   * Note:  This is synonymous to the Metric value that ifconfig prints
+   * out.  It is used by ns-3 global routing, but other routing daemons 
+   * may choose to ignore it. 
+   */
+  uint16_t GetMetric (void) const;
+
+  /**
+   * These are IP interface states and may be distinct from 
+   * NetDevice states, such as found in real implementations
+   * (where the device may be down but IP interface state is still up).
+   */
+  /**
+   * \returns true if this interface is enabled, false otherwise.
+   */
+  bool IsUp (void) const;
+
+  /**
+   * \returns true if this interface is disabled, false otherwise.
+   */
+  bool IsDown (void) const;
+
+  /**
+   * Enable this interface
+   */
+  void SetUp (void);
+
+  /**
+   * Disable this interface
+   */
+  void SetDown (void);
+
+  /**
+   * \param p packet to send
+   */ 
+  void Send (Ptr<Packet> p);
+
+protected:
+  virtual void DoDispose (void);
+
+private:
+  bool m_ifup;
+  uint16_t m_metric;
+  Ptr<Node> m_node;
+  Ptr<NetDevice> m_device;
+};
+
+} // namespace ns3
+
+#endif