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-rw-r--r--src/vnet/interface_api.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/vnet/interface_api.c b/src/vnet/interface_api.c
index d70cd1e42f8..938f3bb327e 100644
--- a/src/vnet/interface_api.c
+++ b/src/vnet/interface_api.c
@@ -258,7 +258,7 @@ send_sw_interface_details (vpe_api_main_t * am,
mp->link_duplex = ntohl (((hi->flags & VNET_HW_INTERFACE_FLAG_DUPLEX_MASK) >>
VNET_HW_INTERFACE_FLAG_DUPLEX_SHIFT));
mp->link_speed = ntohl (hi->link_speed);
- mp->link_mtu = ntohs (hi->max_packet_bytes);
+ mp->link_mtu = ntohs (hi->max_frame_size - hi->frame_overhead);
mp->mtu[VNET_MTU_L3] = ntohl (swif->mtu[VNET_MTU_L3]);
mp->mtu[VNET_MTU_IP4] = ntohl (swif->mtu[VNET_MTU_IP4]);
mp->mtu[VNET_MTU_IP6] = ntohl (swif->mtu[VNET_MTU_IP6]);