Hi, I have some difficulties using ip checksum tx offload capabilities - I think I set everything as advised by the API documentation, but unfortunately the packet leaves the interface with its ip checksum still being zero (it reaches its destination).
What I do is: buffer->ol_flags |= PKT_TX_IP_CKSUM|PKT_TX_IPV4; ip_header->hdr_checksum = 0; buffer->l3_len = sizeof(struct ipv4_hdr); buffer->l2_len = sizeof(struct ether_hdr); In L4 there's UDP, which checksum is zeroed if that matters. Is there something I am missing? The NIC is Intel Corporation Ethernet Controller X710 for 10GbE SFP+ (rev 01). What is more, is there any particular reason for assuming in i40e_xmit_pkts that offloading checksums is unlikely (I mean the line no 1307 "if (unlikely(ol_flags & I40E_TX_CKSUM_OFFLOAD_MASK))" at dpdk-2.0.0/lib/librte_pmd_i40e/i40e_rxtx.c)? Regards, Angela
