diff --git a/platform/src/packet_io.cpp b/platform/src/packet_io.cpp
index c286185..a802812 100644
--- a/platform/src/packet_io.cpp
+++ b/platform/src/packet_io.cpp
@@ -163,6 +163,10 @@ static int handle_session_resetall(struct metadata *meta, struct ctrl_pkt_parser
 
 static void session_value_free_cb(void *ctx);
 
+// return 0 : not keepalive packet
+// return 1 : is  keepalive packet
+static int marsio_buff_is_keepalive(marsio_buff_t *rx_buff);
+
 /******************************************************************************
  * API Definition
  ******************************************************************************/
@@ -334,6 +338,14 @@ int packet_io_polling_nf_interface(struct packet_io *handle, int thread_seq, voi
     {
         marsio_buff_t *rx_buff = rx_buffs[j];
         int raw_len = marsio_buff_datalen(rx_buff);
+
+        if (marsio_buff_is_keepalive(rx_buff))
+        {
+            throughput_metrics_inc(&g_metrics->keepalive_packet_rx, 1, raw_len);
+            marsio_send_burst(handle->dev_nf_interface.mr_path, thread_seq, &rx_buff, 1);
+            continue;
+        }
+
         if (marsio_buff_is_ctrlbuf(rx_buff))
         {
             handle_control_packet(handle, rx_buff, thread_seq, ctx);
@@ -1330,4 +1342,26 @@ static void session_value_free_cb(void *ctx)
 {
     struct session_ctx *s_ctx = (struct session_ctx *)ctx;
     session_ctx_free(s_ctx);
+}
+
+// return 0 : not keepalive packet
+// return 1 : is  keepalive packet
+static int marsio_buff_is_keepalive(marsio_buff_t *rx_buff)
+{
+    int raw_len = marsio_buff_datalen(rx_buff);
+    char *raw_data = marsio_buff_mtod(rx_buff);
+    if (raw_data == NULL || raw_len == 0)
+    {
+        return 0;
+    }
+
+    struct ethhdr *eth_hdr = (struct ethhdr *)raw_data;
+    if (eth_hdr->h_proto == 0xAAAA)
+    {
+        return 1;
+    }
+    else
+    {
+        return 0;
+    }
 }
\ No newline at end of file