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diff --git a/extras/deprecated/vom/vom/sub_interface.hpp b/extras/deprecated/vom/vom/sub_interface.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_SUB_INTERFACE_H__
+#define __VOM_SUB_INTERFACE_H__
+
+#include "vom/interface.hpp"
+
+namespace VOM {
+/**
+ * A Sub-interface. e.g. a VLAN sub-interface on an Ethernet interface
+ */
+class sub_interface : public interface
+{
+  /*
+   * Typedef for VLAN ID
+   */
+  typedef uint16_t vlan_id_t;
+
+public:
+  /**
+   * Construct a new object matching the desried state
+   */
+  sub_interface(const interface& parent, admin_state_t state, vlan_id_t vlan);
+
+  sub_interface(const interface& parent,
+                admin_state_t state,
+                const route_domain& rd,
+                vlan_id_t vlan);
+
+  /**
+   * Destructor
+   */
+  ~sub_interface();
+  /**
+   * Copy Constructor
+   */
+  sub_interface(const sub_interface& o);
+
+  /**
+   * comparison operator - for UT
+   */
+  bool operator==(const sub_interface& s) const;
+
+  /**
+   * Return the matching 'singular instance' of the sub-interface
+   */
+  std::shared_ptr<sub_interface> singular() const;
+
+  /**
+   * Find a subinterface from its key
+   */
+  static std::shared_ptr<sub_interface> find(const key_t& k);
+
+private:
+  /**
+   * Return the matching 'instance' of the sub-interface
+   *  over-ride from the base class
+   */
+  std::shared_ptr<interface> singular_i() const;
+
+  /**
+   * Virtual functions to construct an interface create commands.
+   */
+  virtual std::queue<cmd*>& mk_create_cmd(std::queue<cmd*>& cmds);
+
+  /**
+   * Virtual functions to construct an interface delete commands.
+   */
+  virtual std::queue<cmd*>& mk_delete_cmd(std::queue<cmd*>& cmds);
+
+  /**
+   * From the name of the parent and the vlan,
+   * construct the sub-interface's name
+   */
+  static std::string mk_name(const interface& parent, vlan_id_t vlan);
+
+  /**
+   * Refernece conter lock on the parent
+   */
+  const std::shared_ptr<interface> m_parent;
+
+  /**
+   * VLAN ID
+   */
+  vlan_id_t m_vlan;
+};
+};
+
+/*
+ * fd.io coding-style-patch-verification: OFF
+ *
+ * Local Variables:
+ * eval: (c-set-style "mozilla")
+ * End:
+ */
+
+#endif