diff --git a/app/sample/sample_util.c b/app/sample/sample_util.c
index 5dcd19a85..f50a0e448 100644
--- a/app/sample/sample_util.c
+++ b/app/sample/sample_util.c
@@ -45,6 +45,7 @@ enum sample_args_cmd {
   SAMPLE_ARG_RSS_MODE,
   SAMPLE_ARG_NB_TX_DESC,
   SAMPLE_ARG_NB_RX_DESC,
+  SAMPLE_ARG_DHCP,
 
   SAMPLE_ARG_TX_VIDEO_URL = 0x200,
   SAMPLE_ARG_RX_VIDEO_URL,
@@ -100,6 +101,7 @@ static struct option sample_args_options[] = {
     {"rss_mode", required_argument, 0, SAMPLE_ARG_RSS_MODE},
     {"nb_tx_desc", required_argument, 0, SAMPLE_ARG_NB_TX_DESC},
     {"nb_rx_desc", required_argument, 0, SAMPLE_ARG_NB_RX_DESC},
+    {"dhcp", no_argument, 0, SAMPLE_ARG_DHCP},
 
     {"tx_url", required_argument, 0, SAMPLE_ARG_TX_VIDEO_URL},
     {"rx_url", required_argument, 0, SAMPLE_ARG_RX_VIDEO_URL},
@@ -252,6 +254,10 @@ static int _sample_parse_args(struct st_sample_context* ctx, int argc, char** ar
       case SAMPLE_ARG_UDP_LCORE:
         p->flags |= MTL_FLAG_UDP_LCORE;
         break;
+      case SAMPLE_ARG_DHCP:
+        for (int port = 0; port < MTL_PORT_MAX; port++)
+          p->net_proto[port] = MTL_PROTO_DHCP;
+        break;
       case SAMPLE_ARG_RSS_MODE:
         if (!strcmp(optarg, "l3"))
           p->rss_mode = MTL_RSS_MODE_L3;
diff --git a/app/udp/udp_client_sample.c b/app/udp/udp_client_sample.c
index 5352de8a6..445196cc0 100644
--- a/app/udp/udp_client_sample.c
+++ b/app/udp/udp_client_sample.c
@@ -139,7 +139,7 @@ int main(int argc, char** argv) {
   int ret;
 
   memset(&ctx, 0, sizeof(ctx));
-  ret = sample_parse_args(&ctx, argc, argv, true, false, true);
+  ret = sample_parse_args(&ctx, argc, argv, true, true, true);
   if (ret < 0) return ret;
 
   ctx.st = mtl_init(&ctx.param);
diff --git a/app/udp/udp_server_sample.c b/app/udp/udp_server_sample.c
index 082ebd979..73ad6fefd 100644
--- a/app/udp/udp_server_sample.c
+++ b/app/udp/udp_server_sample.c
@@ -187,7 +187,7 @@ int main(int argc, char** argv) {
   int ret;
 
   memset(&ctx, 0, sizeof(ctx));
-  ret = sample_parse_args(&ctx, argc, argv, false, true, true);
+  ret = sample_parse_args(&ctx, argc, argv, true, true, true);
   if (ret < 0) return ret;
 
   ctx.st = mtl_init(&ctx.param);