Hi,
I am trying to use ixgbe tcp cksum h/w offload by following steps: - populate pseudo cksum - set l2_len, l3_len, l4_len - set ol_flags But I found the pkt doesn't get right h/w checksum by sniffing on recv side, and TCP cksum still leave with the original pseudo cksum. And I verified those meta are correctly set, e.g. a TCP syn pkt: l2_len = 14, l3_len = 20, l4_len = 40 (with some tcp options), and ol_flags = 0x90000000000000 which means PKT_TX_IPV4 | PKT_TX_TCP_CKSUM Did I miss any step? Thanks in advance, Tim