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+/* VxLAN common header.
+ * Copyright (C) 2016, 2017 Cumulus Networks, Inc.
+ *
+ * This file is part of FRR.
+ *
+ * FRR is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2, or (at your option) any
+ * later version.
+ *
+ * FRR 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 FRR; see the file COPYING. If not, write to the Free
+ * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ * 02111-1307, USA.
+ */
+
+#ifndef __VXLAN_H__
+#define __VXLAN_H__
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* EVPN MH DF election algorithm */
+#define EVPN_MH_DF_ALG_SERVICE_CARVING 0
+#define EVPN_MH_DF_ALG_HRW 1
+#define EVPN_MH_DF_ALG_PREF 2
+
+/* preference range for DF election */
+#define EVPN_MH_DF_PREF_MIN 0
+#define EVPN_MH_DF_PREF_DEFAULT 32767
+#define EVPN_MH_DF_PREF_MAX 65535
+
+/* VxLAN Network Identifier - 24-bit (RFC 7348) */
+typedef uint32_t vni_t;
+#define VNI_MAX 16777215 /* (2^24 - 1) */
+
+/* Flooding mechanisms for BUM packets. */
+/* Currently supported mechanisms are head-end (ingress) replication
+ * (which is the default) and no flooding. Future options could be
+ * using PIM-SM, PIM-Bidir etc.
+ */
+enum vxlan_flood_control {
+ VXLAN_FLOOD_HEAD_END_REPL = 0,
+ VXLAN_FLOOD_DISABLED,
+ VXLAN_FLOOD_PIM_SM,
+};
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __VXLAN_H__ */