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-rw-r--r--src/vnet/devices/af_packet/node.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/src/vnet/devices/af_packet/node.c b/src/vnet/devices/af_packet/node.c
index b627cfcb036..556d7489725 100644
--- a/src/vnet/devices/af_packet/node.c
+++ b/src/vnet/devices/af_packet/node.c
@@ -115,7 +115,8 @@ mark_tcp_udp_cksum_calc (vlib_buffer_t * b)
{
ip4_header_t *ip4 =
(vlib_buffer_get_current (b) + sizeof (ethernet_header_t));
- b->flags |= VNET_BUFFER_F_IS_IP4;
+ b->flags |= VNET_BUFFER_F_IS_IP4 | VNET_BUFFER_F_OFFLOAD_IP_CKSUM;
+ ip4->checksum = 0;
if (ip4->protocol == IP_PROTOCOL_TCP)
{
b->flags |= VNET_BUFFER_F_OFFLOAD_TCP_CKSUM;