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diff --git a/extras/vom/vom/ip_unnumbered.hpp b/extras/vom/vom/ip_unnumbered.hpp
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+++ b/extras/vom/vom/ip_unnumbered.hpp
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+/*
+ * Copyright (c) 2017 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef __VOM_IP_UNNUMBERED_H__
+#define __VOM_IP_UNNUMBERED_H__
+
+#include "vom/hw.hpp"
+#include "vom/inspect.hpp"
+#include "vom/interface.hpp"
+#include "vom/object_base.hpp"
+#include "vom/om.hpp"
+#include "vom/singular_db.hpp"
+
+namespace VOM {
+/**
+ * A representation of IP unnumbered configuration on an interface
+ */
+class ip_unnumbered : public object_base
+{
+public:
+  /**
+   * Construct a new object matching the desried state
+   *
+   * @param itf - The interface with no IP address
+   * @param l3_itf - The interface that has the IP address we wish to
+   * share.
+   */
+  ip_unnumbered(const interface& itf, const interface& l3_itf);
+
+  /**
+   * Copy Constructor
+   */
+  ip_unnumbered(const ip_unnumbered& o);
+
+  /**
+   * Destructor
+   */
+  ~ip_unnumbered();
+
+  /**
+   * Return the 'singular instance' of the L3-Config that matches this
+   * object
+   */
+  std::shared_ptr<ip_unnumbered> singular() const;
+
+  /**
+   * convert to string format for debug purposes
+   */
+  std::string to_string() const;
+
+  /**
+   * Dump all ip_unnumbereds into the stream provided
+   */
+  static void dump(std::ostream& os);
+
+  /**
+   * The key type for ip_unnumbereds
+   */
+  typedef interface::key_t key_t;
+
+  /**
+   * Find an singular instance in the DB for the interface passed
+   */
+  static std::shared_ptr<ip_unnumbered> find(const interface& i);
+
+private:
+  /**
+   * Class definition for listeners to OM events
+   */
+  class event_handler : public OM::listener, public inspect::command_handler
+  {
+  public:
+    event_handler();
+    virtual ~event_handler() = default;
+
+    /**
+     * Handle a populate event
+     */
+    void handle_populate(const client_db::key_t& key);
+
+    /**
+     * Handle a replay event
+     */
+    void handle_replay();
+
+    /**
+     * Show the object in the Singular DB
+     */
+    void show(std::ostream& os);
+
+    /**
+     * Get the sortable Id of the listener
+     */
+    dependency_t order() const;
+  };
+
+  /**
+   * event_handler to register with OM
+   */
+  static event_handler m_evh;
+
+  /**
+   * Enquue commonds to the VPP command Q for the update
+   */
+  void update(const ip_unnumbered& obj);
+
+  /**
+   * Find or add the singular instance in the DB
+   */
+  static std::shared_ptr<ip_unnumbered> find_or_add(const ip_unnumbered& temp);
+
+  /*
+   * It's the VPPHW class that updates the objects in HW
+   */
+  friend class OM;
+
+  /**
+   * It's the singular_db class that calls replay
+   */
+  friend class singular_db<key_t, ip_unnumbered>;
+
+  /**
+   * Sweep/reap the object if still stale
+   */
+  void sweep(void);
+
+  /**
+   * replay the object to create it in hardware
+   */
+  void replay(void);
+
+  /**
+   * A reference counting pointer the interface that requires an address.
+   */
+  const std::shared_ptr<interface> m_itf;
+  /**
+   * A reference counting pointer the interface that has an address.
+   */
+  const std::shared_ptr<interface> m_l3_itf;
+
+  /**
+   * HW configuration for the binding. The bool representing the
+   * do/don't bind.
+   */
+  HW::item<bool> m_config;
+
+  /**
+   * A map of all L3 configs keyed against a combination of the interface
+   * and subnet's keys.
+   */
+  static singular_db<key_t, ip_unnumbered> m_db;
+};
+};
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "mozilla")
+ * End:
+ */
+
+#endif