--- main.c  2017-10-06 22:58:52.000000000 +0530
+++ /home/padam.singh/main.c    2018-04-12 11:41:49.460075874 +0530
@@ -119,6 +119,7 @@
        .header_split   = 0, /**< Header Split disabled */
        .hw_ip_checksum = 0, /**< IP checksum offload disabled */
        .hw_vlan_filter = 0, /**< VLAN filtering disabled */
+       .hw_vlan_strip  = 1,
        .jumbo_frame    = 0, /**< Jumbo Frame Support disabled */
        .hw_strip_crc   = 1, /**< CRC stripped by hardware */
    },
@@ -210,11 +211,16 @@
    int sent;
    struct rte_eth_dev_tx_buffer *buffer;

+   struct ether_hdr *eth;
    dst_port = l2fwd_dst_ports[portid];

    if (mac_updating)
        l2fwd_mac_updating(m, dst_port);

+   eth = rte_pktmbuf_mtod(m, struct ether_hdr *);
+   printf("mbuff->vlan_tci=%d vlan_tci_outer=%d ethertype=%x \n",
+       m->vlan_tci, m->vlan_tci_outer,
+       eth->ether_type);
    buffer = tx_buffer[dst_port];
    sent = rte_eth_tx_buffer(dst_port, 0, buffer, m);
    if (sent)
@@ -307,7 +313,6 @@
            portid = qconf->rx_port_list[i];
            nb_rx = rte_eth_rx_burst((uint8_t) portid, 0,
                         pkts_burst, MAX_PKT_BURST);
-
            port_statistics[portid].rx += nb_rx;

            for (j = 0; j < nb_rx; j++) {
@@ -665,6 +670,7 @@
        if (ret < 0)
            rte_exit(EXIT_FAILURE, "Cannot configure device: err=%d, port=%u\n",
                  ret, (unsigned) portid);
+        rte_eth_dev_set_vlan_offload(portid, ETH_VLAN_STRIP_OFFLOAD);

        rte_eth_macaddr_get(portid,&l2fwd_ports_eth_addr[portid]);

@@ -709,6 +715,7 @@
        if (ret < 0)
            rte_exit(EXIT_FAILURE, "rte_eth_dev_start:err=%d, port=%u\n",
                  ret, (unsigned) portid);
+        rte_eth_dev_set_vlan_offload(portid, ETH_VLAN_STRIP_OFFLOAD);

        printf("done: \n");