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diff --git a/extras/deprecated/plugins/gbp/gbp_ext_itf.h b/extras/deprecated/plugins/gbp/gbp_ext_itf.h
new file mode 100644
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+++ b/extras/deprecated/plugins/gbp/gbp_ext_itf.h
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+/*
+ * Copyright (c) 2018 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 __GBP_EXT_ITF_H__
+#define __GBP_EXT_ITF_H__
+
+#include <gbp/gbp.h>
+
+enum
+{
+  GBP_EXT_ITF_F_NONE = 0,
+  GBP_EXT_ITF_F_ANON = 1 << 0,
+};
+
+/**
+ * An external interface maps directly to an oflex L3ExternalInterface.
+ * The special characteristics of an external interface is the way the source
+ * EPG is determined for input packets which, like a recirc interface, is via
+ * a LPM.
+ */
+typedef struct gpb_ext_itf_t_
+{
+  /**
+   * The interface
+   */
+  gbp_itf_hdl_t gx_itf;
+
+  /**
+   * The BD this external interface is a member of
+   */
+  index_t gx_bd;
+
+  /**
+   * The RD this external interface is a member of
+   */
+  index_t gx_rd;
+
+  /**
+   * cached FIB indices from the RD
+   */
+  u32 gx_fib_index[DPO_PROTO_NUM];
+
+  /**
+   * The associated flags
+   */
+  u32 gx_flags;
+
+} gbp_ext_itf_t;
+
+
+extern int gbp_ext_itf_add (u32 sw_if_index, u32 bd_id, u32 rd_id, u32 flags);
+extern int gbp_ext_itf_delete (u32 sw_if_index);
+
+extern u8 *format_gbp_ext_itf (u8 * s, va_list * args);
+
+typedef walk_rc_t (*gbp_ext_itf_cb_t) (gbp_ext_itf_t * gbpe, void *ctx);
+extern void gbp_ext_itf_walk (gbp_ext_itf_cb_t bgpe, void *ctx);
+
+
+/**
+ * Exposed types for the data-plane
+ */
+extern gbp_ext_itf_t *gbp_ext_itf_pool;
+extern index_t *gbp_ext_itf_db;
+
+always_inline gbp_ext_itf_t *
+gbp_ext_itf_get (u32 sw_if_index)
+{
+  return (pool_elt_at_index (gbp_ext_itf_pool, gbp_ext_itf_db[sw_if_index]));
+}
+
+#endif
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */