1 files changed, 8 insertions, 3 deletions
diff --git a/src/vnet/interface.h b/src/vnet/interface.h
index d462e1e8448..7556bc5544e 100644
--- a/src/vnet/interface.h
+++ b/src/vnet/interface.h
@@ -512,6 +512,14 @@ typedef struct vnet_hw_interface_t
   /* Largest packet size for this interface. */
   u32 max_packet_bytes;
 
+  /* Number of extra bytes that go on the wire.
+     Packet length on wire
+     = max (length + per_packet_overhead_bytes, min_packet_bytes). */
+  u32 per_packet_overhead_bytes;
+
+  /* Receive and transmit layer 3 packet size limits (MRU/MTU). */
+  u32 max_l3_packet_bytes[VLIB_N_RX_TX];
+
   /* Hash table mapping sub interface id to sw_if_index. */
   uword *sub_interface_sw_if_index_by_id;
 
@@ -648,9 +656,6 @@ typedef struct
 
   u32 link_speed;
 
-  /* Receive and transmit layer 3 packet size limits (MRU/MTU). */
-  u32 max_l3_packet_bytes[VLIB_N_RX_TX];
-
   union
   {
     /* VNET_SW_INTERFACE_TYPE_HARDWARE. */