diff --git a/app/test-pmd/parameters.c b/app/test-pmd/parameters.c
index c8acd5d1b7..c5dac33b0f 100644
--- a/app/test-pmd/parameters.c
+++ b/app/test-pmd/parameters.c
@@ -224,6 +224,7 @@ usage(char* progname)
 	printf("  --hairpin-mode=0xXX: bitmask set the hairpin port mode.\n "
 	       "    0x10 - explicit Tx rule, 0x02 - hairpin ports paired\n"
 	       "    0x01 - hairpin ports loop, 0x00 - hairpin port self\n");
+	printf("  --eth-link-speed: forced link speed.\n");
 }
 
 #ifdef RTE_LIB_CMDLINE
@@ -485,6 +486,43 @@ parse_event_printing_config(const char *optarg, int enable)
 	return 0;
 }
 
+static int
+parse_link_speed(int n)
+{
+	uint32_t speed = ETH_LINK_SPEED_FIXED;
+
+	switch (n) {
+	case 1000:
+		speed |= ETH_LINK_SPEED_1G;
+		break;
+	case 10000:
+		speed |= ETH_LINK_SPEED_10G;
+		break;
+	case 25000:
+		speed |= ETH_LINK_SPEED_25G;
+		break;
+	case 40000:
+		speed |= ETH_LINK_SPEED_40G;
+		break;
+	case 50000:
+		speed |= ETH_LINK_SPEED_50G;
+		break;
+	case 100000:
+		speed |= ETH_LINK_SPEED_100G;
+		break;
+	case 200000:
+		speed |= ETH_LINK_SPEED_200G;
+		break;
+	case 100:
+	case 10:
+	default:
+		printf("Unsupported fixed speed\n");
+		return 0;
+	}
+
+	return speed;
+}
+
 void
 launch_args_parse(int argc, char** argv)
 {
@@ -605,6 +643,7 @@ launch_args_parse(int argc, char** argv)
 		{ "rx-mq-mode",                 1, 0, 0 },
 		{ "record-core-cycles",         0, 0, 0 },
 		{ "record-burst-stats",         0, 0, 0 },
+		{ "eth-link-speed",		1, 0, 0 },
 		{ 0, 0, 0, 0 },
 	};
 
@@ -1366,6 +1405,11 @@ launch_args_parse(int argc, char** argv)
 				record_core_cycles = 1;
 			if (!strcmp(lgopts[opt_idx].name, "record-burst-stats"))
 				record_burst_stats = 1;
+			if (!strcmp(lgopts[opt_idx].name, "eth-link-speed")) {
+				n = atoi(optarg);
+				if (n >= 0 && parse_link_speed(n) > 0)
+					eth_link_speed = parse_link_speed(n);
+			}
 			break;
 		case 'h':
 			usage(argv[0]);
diff --git a/app/test-pmd/testpmd.c b/app/test-pmd/testpmd.c
index 1a57324b1b..98c3248c01 100644
--- a/app/test-pmd/testpmd.c
+++ b/app/test-pmd/testpmd.c
@@ -513,6 +513,11 @@ uint8_t gro_flush_cycles = GRO_DEFAULT_FLUSH_CYCLES;
  */
 enum rte_eth_rx_mq_mode rx_mq_mode = ETH_MQ_RX_VMDQ_DCB_RSS;
 
+/*
+ * Used to set forced link speed
+ */
+uint32_t eth_link_speed;
+
 /* Forward function declarations */
 static void setup_attached_port(portid_t pi);
 static void check_all_ports_link_status(uint32_t port_mask);
@@ -1484,6 +1489,9 @@ init_config(void)
 			port->tx_conf[k].offloads =
 				port->dev_conf.txmode.offloads;
 
+		if (eth_link_speed)
+			port->dev_conf.link_speeds = eth_link_speed;
+
 		/* set flag to initialize port/queue */
 		port->need_reconfig = 1;
 		port->need_reconfig_queues = 1;
diff --git a/app/test-pmd/testpmd.h b/app/test-pmd/testpmd.h
index ce83f31f0d..0f54bcc346 100644
--- a/app/test-pmd/testpmd.h
+++ b/app/test-pmd/testpmd.h
@@ -353,6 +353,7 @@ extern bool setup_on_probe_event; /**< disabled by port setup-on iterator */
 extern uint8_t hot_plug; /**< enable by "--hot-plug" parameter */
 extern int do_mlockall; /**< set by "--mlockall" or "--no-mlockall" parameter */
 extern uint8_t clear_ptypes; /**< disabled by set ptype cmd */
+extern uint32_t eth_link_speed;
 
 #ifdef RTE_LIBRTE_IXGBE_BYPASS
 extern uint32_t bypass_timeout; /**< Store the NIC bypass watchdog timeout */
diff --git a/doc/guides/rel_notes/release_21_05.rst b/doc/guides/rel_notes/release_21_05.rst
index ca28d05d59..dde652dddf 100644
--- a/doc/guides/rel_notes/release_21_05.rst
+++ b/doc/guides/rel_notes/release_21_05.rst
@@ -64,6 +64,9 @@ New Features
   * Added command to display Rx queue used descriptor count.
     ``show port (port_id) rxq (queue_id) desc used count``
 
+  * Added a command line option to configure forced speed for Ethernet port.
+    ``dpdk-testpmd -c 0xff  -- -i  --eth-link-speed N``
+
 
 Removed Items
 -------------
diff --git a/doc/guides/testpmd_app_ug/run_app.rst b/doc/guides/testpmd_app_ug/run_app.rst
index 6745072329..3035118cdc 100644
--- a/doc/guides/testpmd_app_ug/run_app.rst
+++ b/doc/guides/testpmd_app_ug/run_app.rst
@@ -536,3 +536,18 @@ The command line options are:
     bit 1 - two hairpin ports paired
     bit 0 - two hairpin ports loop
     The default value is 0. Hairpin will use single port mode and implicit Tx flow mode.
+
+*   ``--eth-link-speed``
+
+    Set a forced link speed to the ethernet port::
+
+       10 - 10Mbps (not supported)
+       100 - 100Mbps (not supported)
+       1000 - 1Gbps
+       10000 - 10Gbps
+       25000 - 25Gbps
+       40000 - 40Gbps
+       50000 - 50Gbps
+       100000 - 100Gbps
+       200000 - 200Gbps
+       ...
