{
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;