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diff --git a/src/plugins/l3xc/l3xc.api b/src/plugins/l3xc/l3xc.api
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+/* Hey Emacs use -*- mode: C -*- */
+/*
+ * Copyright (c) 2016 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.
+ */
+
+/** \file
+    This file defines the vpp control-plane API messages
+    used to control the L3XC plugin
+*/
+
+option version = "1.0.0";
+
+import "vnet/fib/fib_types.api";
+
+/** \brief Get the plugin version
+    @param client_index - opaque cookie to identify the sender
+    @param context - sender context, to match reply w/ request
+*/
+define l3xc_plugin_get_version
+{
+  u32 client_index;
+  u32 context;
+};
+
+/** \brief Reply to get the plugin version
+    @param context - returned sender context, to match reply w/ request
+    @param major - Incremented every time a known breaking behavior change is introduced
+    @param minor - Incremented with small changes, may be used to avoid buggy versions
+*/
+define l3xc_plugin_get_version_reply
+{
+  u32 context;
+  u32 major;
+  u32 minor;
+};
+
+/** \brief A description of an L3XC policy
+    @param input interface of the x-connect
+    @param n_paths Number of paths
+    @param paths The set of forwarding paths.
+ */
+typeonly define l3xc
+{
+  u32 sw_if_index;
+  u8 is_ip6;
+  u8 n_paths;
+  vl_api_fib_path_t paths[n_paths];
+};
+
+define l3xc_update
+{
+  u32 client_index;
+  u32 context;
+  vl_api_l3xc_t l3xc;
+};
+define l3xc_update_reply
+{
+  u32 context;
+  i32 retval;
+  u32 stats_index;
+};
+
+
+autoreply define l3xc_del
+{
+  u32 client_index;
+  u32 context;
+  u32 sw_if_index;
+  u8 is_ip6;
+};
+
+/** \brief Dump all L3XC policies
+ */
+define l3xc_dump
+{
+  u32 client_index;
+  u32 context;
+  u32 sw_if_index;
+};
+
+/** \brief description returned in the dump
+ */
+define l3xc_details
+{
+  u32 context;
+  vl_api_l3xc_t l3xc;
+};