diff --git a/components/idf_test/include/idf_performance.h b/components/idf_test/include/idf_performance.h
index 0a40dc14e1..84e1d897df 100644
--- a/components/idf_test/include/idf_performance.h
+++ b/components/idf_test/include/idf_performance.h
@@ -68,6 +68,20 @@
 #define IDF_PERFORMANCE_MIN_UDP_TX_ETH_THROUGHPUT                                   70
 #endif
 
+#ifndef IDF_PERFORMANCE_MIN_TCP_RX_ETH_THROUGHPUT_SPI_ETH
+#define IDF_PERFORMANCE_MIN_TCP_RX_ETH_THROUGHPUT_SPI_ETH                           2
+#endif
+#ifndef IDF_PERFORMANCE_MIN_TCP_TX_ETH_THROUGHPUT_SPI_ETH
+#define IDF_PERFORMANCE_MIN_TCP_TX_ETH_THROUGHPUT_SPI_ETH                           3
+#endif
+#ifndef IDF_PERFORMANCE_MIN_UDP_RX_ETH_THROUGHPUT_SPI_ETH
+#define IDF_PERFORMANCE_MIN_UDP_RX_ETH_THROUGHPUT_SPI_ETH                           5
+#endif
+#ifndef IDF_PERFORMANCE_MIN_UDP_TX_ETH_THROUGHPUT_SPI_ETH
+#define IDF_PERFORMANCE_MIN_UDP_TX_ETH_THROUGHPUT_SPI_ETH                           7
+#endif
+
+
 // events dispatched per second by event loop library
 #if !CONFIG_FREERTOS_SMP // IDF-5112
 #ifndef IDF_PERFORMANCE_MIN_EVENT_DISPATCH
diff --git a/examples/ethernet/iperf/pytest_eth_iperf.py b/examples/ethernet/iperf/pytest_eth_iperf.py
index ce7be622b1..b6977a0357 100644
--- a/examples/ethernet/iperf/pytest_eth_iperf.py
+++ b/examples/ethernet/iperf/pytest_eth_iperf.py
@@ -1,4 +1,4 @@
-# SPDX-FileCopyrightText: 2022-2023 Espressif Systems (Shanghai) CO LTD
+# SPDX-FileCopyrightText: 2022-2024 Espressif Systems (Shanghai) CO LTD
 # SPDX-License-Identifier: Unlicense OR CC0-1.0
 """
 Test case for iperf example.
@@ -8,8 +8,6 @@ This test case might have problem running on Windows:
 - use `sudo killall iperf` to force kill iperf, didn't implement windows version
 
 """
-from __future__ import division, unicode_literals
-
 import os
 import subprocess
 
@@ -19,7 +17,7 @@ from idf_iperf_test_util import IperfUtility
 from pytest_embedded import Dut
 
 try:
-    from typing import Any, Callable, Tuple
+    from typing import Any, Callable, Tuple, Optional
 except ImportError:
     # Only used for type annotations
     pass
@@ -51,12 +49,11 @@ class IperfTestUtilityEth(IperfUtility.IperfTestUtility):
         return dut_ip, rssi
 
 
-@pytest.mark.esp32
-@pytest.mark.ethernet_router
 def test_esp_eth_iperf(
     dut: Dut,
     log_performance: Callable[[str, object], None],
     check_performance: Callable[[str, float, str], None],
+    spi_eth: Optional[bool] = False
 ) -> None:
     """
     steps: |
@@ -83,7 +80,11 @@ def test_esp_eth_iperf(
     test_utility.run_test('tcp', 'tx', 0, NO_BANDWIDTH_LIMIT)
     test_utility.run_test('tcp', 'rx', 0, NO_BANDWIDTH_LIMIT)
     test_utility.run_test('udp', 'tx', 0, 80)
-    test_utility.run_test('udp', 'rx', 0, NO_BANDWIDTH_LIMIT)
+    # Limit speed to 10Mbps for SPI Ethernet PHYs
+    if spi_eth:
+        test_utility.run_test('udp', 'rx', 0, 10)
+    else:
+        test_utility.run_test('udp', 'rx', 0, NO_BANDWIDTH_LIMIT)
 
     # 4. log performance and compare with pass standard
     for throughput_type in test_result:
@@ -92,6 +93,115 @@ def test_esp_eth_iperf(
 
     # do check after logging, otherwise test will exit immediately if check fail, some performance can't be logged.
     for throughput_type in test_result:
-        check_performance('{}_throughput'.format(throughput_type + '_eth'),
-                          test_result[throughput_type].get_best_throughput(),
-                          dut.target)
+        if spi_eth:
+            check_performance('{}_eth_throughput_spi_eth'.format(throughput_type),
+                              test_result[throughput_type].get_best_throughput(),
+                              dut.target)
+        else:
+            check_performance('{}_eth_throughput'.format(throughput_type),
+                              test_result[throughput_type].get_best_throughput(),
+                              dut.target)
+
+
+@pytest.mark.esp32
+@pytest.mark.ethernet_router
+@pytest.mark.parametrize('config', [
+    'default_ip101',
+], indirect=True)
+def test_esp_eth_iperf_ip101(
+    dut: Dut,
+    log_performance: Callable[[str, object], None],
+    check_performance: Callable[[str, float, str], None],
+) -> None:
+    test_esp_eth_iperf(dut, log_performance, check_performance)
+
+
+@pytest.mark.esp32
+@pytest.mark.eth_lan8720
+@pytest.mark.parametrize('config', [
+    'default_lan8720',
+], indirect=True)
+def test_esp_eth_iperf_lan8720(
+    dut: Dut,
+    log_performance: Callable[[str, object], None],
+    check_performance: Callable[[str, float, str], None],
+) -> None:
+    test_esp_eth_iperf(dut, log_performance, check_performance)
+
+
+@pytest.mark.esp32
+@pytest.mark.eth_rtl8201
+@pytest.mark.parametrize('config', [
+    'default_rtl8201',
+], indirect=True)
+def test_esp_eth_iperf_rtl8201(
+    dut: Dut,
+    log_performance: Callable[[str, object], None],
+    check_performance: Callable[[str, float, str], None],
+) -> None:
+    test_esp_eth_iperf(dut, log_performance, check_performance)
+
+
+@pytest.mark.esp32
+@pytest.mark.eth_dp83848
+@pytest.mark.parametrize('config', [
+    'default_dp83848',
+], indirect=True)
+def test_esp_eth_iperf_dp83848(
+    dut: Dut,
+    log_performance: Callable[[str, object], None],
+    check_performance: Callable[[str, float, str], None],
+) -> None:
+    test_esp_eth_iperf(dut, log_performance, check_performance)
+
+
+@pytest.mark.esp32
+@pytest.mark.eth_ksz8041
+@pytest.mark.parametrize('config', [
+    'default_ksz8041',
+], indirect=True)
+def test_esp_eth_iperf_ksz8041(
+    dut: Dut,
+    log_performance: Callable[[str, object], None],
+    check_performance: Callable[[str, float, str], None],
+) -> None:
+    test_esp_eth_iperf(dut, log_performance, check_performance)
+
+
+@pytest.mark.esp32
+@pytest.mark.eth_dm9051
+@pytest.mark.parametrize('config', [
+    'default_dm9051',
+], indirect=True)
+def test_esp_eth_iperf_dm9051(
+    dut: Dut,
+    log_performance: Callable[[str, object], None],
+    check_performance: Callable[[str, float, str], None],
+) -> None:
+    test_esp_eth_iperf(dut, log_performance, check_performance, spi_eth=True)
+
+
+@pytest.mark.esp32
+@pytest.mark.eth_w5500
+@pytest.mark.parametrize('config', [
+    'default_w5500',
+], indirect=True)
+def test_esp_eth_iperf_w5500(
+    dut: Dut,
+    log_performance: Callable[[str, object], None],
+    check_performance: Callable[[str, float, str], None],
+) -> None:
+    test_esp_eth_iperf(dut, log_performance, check_performance, spi_eth=True)
+
+
+@pytest.mark.esp32
+@pytest.mark.eth_ksz8851snl
+@pytest.mark.parametrize('config', [
+    'default_ksz8851snl',
+], indirect=True)
+def test_esp_eth_iperf_ksz8851snl(
+    dut: Dut,
+    log_performance: Callable[[str, object], None],
+    check_performance: Callable[[str, float, str], None],
+) -> None:
+    test_esp_eth_iperf(dut, log_performance, check_performance, spi_eth=True)
diff --git a/examples/ethernet/iperf/sdkconfig.ci.default_dm9051 b/examples/ethernet/iperf/sdkconfig.ci.default_dm9051
new file mode 100644
index 0000000000..9ab9acaecc
--- /dev/null
+++ b/examples/ethernet/iperf/sdkconfig.ci.default_dm9051
@@ -0,0 +1,38 @@
+# Increase main task stack size
+CONFIG_ESP_MAIN_TASK_STACK_SIZE=7168
+
+# Enable filesystem for console commands history storage
+CONFIG_ESPTOOLPY_FLASHSIZE_4MB=y
+CONFIG_PARTITION_TABLE_CUSTOM=y
+CONFIG_PARTITION_TABLE_CUSTOM_FILENAME="partitions_example.csv"
+CONFIG_PARTITION_TABLE_FILENAME="partitions_example.csv"
+
+# Enable FreeRTOS stats formatting functions, needed for 'tasks' command
+CONFIG_FREERTOS_USE_TRACE_FACILITY=y
+CONFIG_FREERTOS_USE_STATS_FORMATTING_FUNCTIONS=y
+
+# --------------------------------
+# Performance optimization options
+# --------------------------------
+# `lwIP` and `iperf` tasks have serial dependency to each other (i.e. `iperf` must wait for `lwIP`
+# to process the packets). Therefore, you don't gain much performance improvement when running
+# multi core mode. On the other hand, IRAM optimizations have greater effect for single core mode.
+
+# Run FreeRTOS only on the first core
+CONFIG_FREERTOS_UNICORE=y
+
+# Disable watch dog
+CONFIG_ESP_INT_WDT=n
+CONFIG_ESP_TASK_WDT_EN=n
+
+# Enable lwIP IRAM optimization
+CONFIG_LWIP_IRAM_OPTIMIZATION=y
+
+# Enable Ethernet IRAM optimization
+CONFIG_ETH_IRAM_OPTIMIZATION=y
+
+CONFIG_EXAMPLE_USE_SPI_ETHERNET=y
+CONFIG_EXAMPLE_USE_INTERNAL_ETHERNET=n
+CONFIG_EXAMPLE_SPI_ETHERNETS_NUM=1
+CONFIG_EXAMPLE_USE_DM9051=y
+CONFIG_EXAMPLE_ETH_SPI_CLOCK_MHZ=20
diff --git a/examples/ethernet/iperf/sdkconfig.ci.default_dp83848 b/examples/ethernet/iperf/sdkconfig.ci.default_dp83848
new file mode 100644
index 0000000000..f02a7365bd
--- /dev/null
+++ b/examples/ethernet/iperf/sdkconfig.ci.default_dp83848
@@ -0,0 +1,45 @@
+# Increase main task stack size
+CONFIG_ESP_MAIN_TASK_STACK_SIZE=7168
+
+# Enable filesystem for console commands history storage
+CONFIG_ESPTOOLPY_FLASHSIZE_4MB=y
+CONFIG_PARTITION_TABLE_CUSTOM=y
+CONFIG_PARTITION_TABLE_CUSTOM_FILENAME="partitions_example.csv"
+CONFIG_PARTITION_TABLE_FILENAME="partitions_example.csv"
+
+# Enable FreeRTOS stats formatting functions, needed for 'tasks' command
+CONFIG_FREERTOS_USE_TRACE_FACILITY=y
+CONFIG_FREERTOS_USE_STATS_FORMATTING_FUNCTIONS=y
+
+# --------------------------------
+# Performance optimization options
+# --------------------------------
+# `lwIP` and `iperf` tasks have serial dependency to each other (i.e. `iperf` must wait for `lwIP`
+# to process the packets). Therefore, you don't gain much performance improvement when running
+# multi core mode. On the other hand, IRAM optimizations have greater effect for single core mode.
+
+# Run FreeRTOS only on the first core
+CONFIG_FREERTOS_UNICORE=y
+
+# Disable watch dog
+CONFIG_ESP_INT_WDT=n
+CONFIG_ESP_TASK_WDT_EN=n
+
+# Enable lwIP IRAM optimization
+CONFIG_LWIP_IRAM_OPTIMIZATION=y
+
+# Enable Ethernet IRAM optimization
+CONFIG_ETH_IRAM_OPTIMIZATION=y
+
+CONFIG_EXAMPLE_USE_INTERNAL_ETHERNET=y
+CONFIG_EXAMPLE_ETH_PHY_DP83848=y
+CONFIG_EXAMPLE_ETH_MDC_GPIO=23
+CONFIG_EXAMPLE_ETH_MDIO_GPIO=18
+CONFIG_EXAMPLE_ETH_PHY_RST_GPIO=5
+CONFIG_EXAMPLE_ETH_PHY_ADDR=1
+
+CONFIG_ETH_ENABLED=y
+CONFIG_ETH_USE_ESP32_EMAC=y
+CONFIG_ETH_PHY_INTERFACE_RMII=y
+CONFIG_ETH_RMII_CLK_OUTPUT=y
+CONFIG_ETH_RMII_CLK_OUT_GPIO=17
diff --git a/examples/ethernet/iperf/sdkconfig.ci.default_ip101 b/examples/ethernet/iperf/sdkconfig.ci.default_ip101
new file mode 100644
index 0000000000..82f756e542
--- /dev/null
+++ b/examples/ethernet/iperf/sdkconfig.ci.default_ip101
@@ -0,0 +1,44 @@
+# Increase main task stack size
+CONFIG_ESP_MAIN_TASK_STACK_SIZE=7168
+
+# Enable filesystem for console commands history storage
+CONFIG_ESPTOOLPY_FLASHSIZE_4MB=y
+CONFIG_PARTITION_TABLE_CUSTOM=y
+CONFIG_PARTITION_TABLE_CUSTOM_FILENAME="partitions_example.csv"
+CONFIG_PARTITION_TABLE_FILENAME="partitions_example.csv"
+
+# Enable FreeRTOS stats formatting functions, needed for 'tasks' command
+CONFIG_FREERTOS_USE_TRACE_FACILITY=y
+CONFIG_FREERTOS_USE_STATS_FORMATTING_FUNCTIONS=y
+
+# --------------------------------
+# Performance optimization options
+# --------------------------------
+# `lwIP` and `iperf` tasks have serial dependency to each other (i.e. `iperf` must wait for `lwIP`
+# to process the packets). Therefore, you don't gain much performance improvement when running
+# multi core mode. On the other hand, IRAM optimizations have greater effect for single core mode.
+
+# Run FreeRTOS only on the first core
+CONFIG_FREERTOS_UNICORE=y
+
+# Disable watch dog
+CONFIG_ESP_INT_WDT=n
+CONFIG_ESP_TASK_WDT_EN=n
+
+# Enable lwIP IRAM optimization
+CONFIG_LWIP_IRAM_OPTIMIZATION=y
+
+# Enable Ethernet IRAM optimization
+CONFIG_ETH_IRAM_OPTIMIZATION=y
+
+CONFIG_EXAMPLE_USE_INTERNAL_ETHERNET=y
+CONFIG_EXAMPLE_ETH_PHY_IP101=y
+CONFIG_EXAMPLE_ETH_MDC_GPIO=23
+CONFIG_EXAMPLE_ETH_MDIO_GPIO=18
+CONFIG_EXAMPLE_ETH_PHY_RST_GPIO=5
+CONFIG_EXAMPLE_ETH_PHY_ADDR=1
+
+CONFIG_ETH_ENABLED=y
+CONFIG_ETH_USE_ESP32_EMAC=y
+CONFIG_ETH_PHY_INTERFACE_RMII=y
+CONFIG_ETH_RMII_CLK_INPUT=y
diff --git a/examples/ethernet/iperf/sdkconfig.ci.default_ksz8041 b/examples/ethernet/iperf/sdkconfig.ci.default_ksz8041
new file mode 100644
index 0000000000..bbb4b51c05
--- /dev/null
+++ b/examples/ethernet/iperf/sdkconfig.ci.default_ksz8041
@@ -0,0 +1,45 @@
+# Increase main task stack size
+CONFIG_ESP_MAIN_TASK_STACK_SIZE=7168
+
+# Enable filesystem for console commands history storage
+CONFIG_ESPTOOLPY_FLASHSIZE_4MB=y
+CONFIG_PARTITION_TABLE_CUSTOM=y
+CONFIG_PARTITION_TABLE_CUSTOM_FILENAME="partitions_example.csv"
+CONFIG_PARTITION_TABLE_FILENAME="partitions_example.csv"
+
+# Enable FreeRTOS stats formatting functions, needed for 'tasks' command
+CONFIG_FREERTOS_USE_TRACE_FACILITY=y
+CONFIG_FREERTOS_USE_STATS_FORMATTING_FUNCTIONS=y
+
+# --------------------------------
+# Performance optimization options
+# --------------------------------
+# `lwIP` and `iperf` tasks have serial dependency to each other (i.e. `iperf` must wait for `lwIP`
+# to process the packets). Therefore, you don't gain much performance improvement when running
+# multi core mode. On the other hand, IRAM optimizations have greater effect for single core mode.
+
+# Run FreeRTOS only on the first core
+CONFIG_FREERTOS_UNICORE=y
+
+# Disable watch dog
+CONFIG_ESP_INT_WDT=n
+CONFIG_ESP_TASK_WDT_EN=n
+
+# Enable lwIP IRAM optimization
+CONFIG_LWIP_IRAM_OPTIMIZATION=y
+
+# Enable Ethernet IRAM optimization
+CONFIG_ETH_IRAM_OPTIMIZATION=y
+
+CONFIG_EXAMPLE_USE_INTERNAL_ETHERNET=y
+CONFIG_EXAMPLE_ETH_PHY_KSZ80XX=y
+CONFIG_EXAMPLE_ETH_MDC_GPIO=23
+CONFIG_EXAMPLE_ETH_MDIO_GPIO=18
+CONFIG_EXAMPLE_ETH_PHY_RST_GPIO=5
+CONFIG_EXAMPLE_ETH_PHY_ADDR=1
+
+CONFIG_ETH_ENABLED=y
+CONFIG_ETH_USE_ESP32_EMAC=y
+CONFIG_ETH_PHY_INTERFACE_RMII=y
+CONFIG_ETH_RMII_CLK_INPUT=y
+CONFIG_ETH_RMII_CLK_IN_GPIO=0
diff --git a/examples/ethernet/iperf/sdkconfig.ci.default_ksz8851snl b/examples/ethernet/iperf/sdkconfig.ci.default_ksz8851snl
new file mode 100644
index 0000000000..819e36a9d2
--- /dev/null
+++ b/examples/ethernet/iperf/sdkconfig.ci.default_ksz8851snl
@@ -0,0 +1,38 @@
+# Increase main task stack size
+CONFIG_ESP_MAIN_TASK_STACK_SIZE=7168
+
+# Enable filesystem for console commands history storage
+CONFIG_ESPTOOLPY_FLASHSIZE_4MB=y
+CONFIG_PARTITION_TABLE_CUSTOM=y
+CONFIG_PARTITION_TABLE_CUSTOM_FILENAME="partitions_example.csv"
+CONFIG_PARTITION_TABLE_FILENAME="partitions_example.csv"
+
+# Enable FreeRTOS stats formatting functions, needed for 'tasks' command
+CONFIG_FREERTOS_USE_TRACE_FACILITY=y
+CONFIG_FREERTOS_USE_STATS_FORMATTING_FUNCTIONS=y
+
+# --------------------------------
+# Performance optimization options
+# --------------------------------
+# `lwIP` and `iperf` tasks have serial dependency to each other (i.e. `iperf` must wait for `lwIP`
+# to process the packets). Therefore, you don't gain much performance improvement when running
+# multi core mode. On the other hand, IRAM optimizations have greater effect for single core mode.
+
+# Run FreeRTOS only on the first core
+CONFIG_FREERTOS_UNICORE=y
+
+# Disable watch dog
+CONFIG_ESP_INT_WDT=n
+CONFIG_ESP_TASK_WDT_EN=n
+
+# Enable lwIP IRAM optimization
+CONFIG_LWIP_IRAM_OPTIMIZATION=y
+
+# Enable Ethernet IRAM optimization
+CONFIG_ETH_IRAM_OPTIMIZATION=y
+
+CONFIG_EXAMPLE_USE_SPI_ETHERNET=y
+CONFIG_EXAMPLE_USE_INTERNAL_ETHERNET=n
+CONFIG_EXAMPLE_SPI_ETHERNETS_NUM=1
+CONFIG_EXAMPLE_USE_KSZ8851SNL=y
+CONFIG_EXAMPLE_ETH_SPI_CLOCK_MHZ=20
diff --git a/examples/ethernet/iperf/sdkconfig.ci.default_lan8720 b/examples/ethernet/iperf/sdkconfig.ci.default_lan8720
new file mode 100644
index 0000000000..038777d84f
--- /dev/null
+++ b/examples/ethernet/iperf/sdkconfig.ci.default_lan8720
@@ -0,0 +1,45 @@
+# Increase main task stack size
+CONFIG_ESP_MAIN_TASK_STACK_SIZE=7168
+
+# Enable filesystem for console commands history storage
+CONFIG_ESPTOOLPY_FLASHSIZE_4MB=y
+CONFIG_PARTITION_TABLE_CUSTOM=y
+CONFIG_PARTITION_TABLE_CUSTOM_FILENAME="partitions_example.csv"
+CONFIG_PARTITION_TABLE_FILENAME="partitions_example.csv"
+
+# Enable FreeRTOS stats formatting functions, needed for 'tasks' command
+CONFIG_FREERTOS_USE_TRACE_FACILITY=y
+CONFIG_FREERTOS_USE_STATS_FORMATTING_FUNCTIONS=y
+
+# --------------------------------
+# Performance optimization options
+# --------------------------------
+# `lwIP` and `iperf` tasks have serial dependency to each other (i.e. `iperf` must wait for `lwIP`
+# to process the packets). Therefore, you don't gain much performance improvement when running
+# multi core mode. On the other hand, IRAM optimizations have greater effect for single core mode.
+
+# Run FreeRTOS only on the first core
+CONFIG_FREERTOS_UNICORE=y
+
+# Disable watch dog
+CONFIG_ESP_INT_WDT=n
+CONFIG_ESP_TASK_WDT_EN=n
+
+# Enable lwIP IRAM optimization
+CONFIG_LWIP_IRAM_OPTIMIZATION=y
+
+# Enable Ethernet IRAM optimization
+CONFIG_ETH_IRAM_OPTIMIZATION=y
+
+CONFIG_EXAMPLE_USE_INTERNAL_ETHERNET=y
+CONFIG_EXAMPLE_ETH_PHY_LAN87XX=y
+CONFIG_EXAMPLE_ETH_MDC_GPIO=23
+CONFIG_EXAMPLE_ETH_MDIO_GPIO=18
+CONFIG_EXAMPLE_ETH_PHY_RST_GPIO=5
+CONFIG_EXAMPLE_ETH_PHY_ADDR=0
+
+CONFIG_ETH_ENABLED=y
+CONFIG_ETH_USE_ESP32_EMAC=y
+CONFIG_ETH_PHY_INTERFACE_RMII=y
+CONFIG_ETH_RMII_CLK_OUTPUT=y
+CONFIG_ETH_RMII_CLK_OUT_GPIO=17
diff --git a/examples/ethernet/iperf/sdkconfig.ci.default_rtl8201 b/examples/ethernet/iperf/sdkconfig.ci.default_rtl8201
new file mode 100644
index 0000000000..229ffbb78a
--- /dev/null
+++ b/examples/ethernet/iperf/sdkconfig.ci.default_rtl8201
@@ -0,0 +1,44 @@
+# Increase main task stack size
+CONFIG_ESP_MAIN_TASK_STACK_SIZE=7168
+
+# Enable filesystem for console commands history storage
+CONFIG_ESPTOOLPY_FLASHSIZE_4MB=y
+CONFIG_PARTITION_TABLE_CUSTOM=y
+CONFIG_PARTITION_TABLE_CUSTOM_FILENAME="partitions_example.csv"
+CONFIG_PARTITION_TABLE_FILENAME="partitions_example.csv"
+
+# Enable FreeRTOS stats formatting functions, needed for 'tasks' command
+CONFIG_FREERTOS_USE_TRACE_FACILITY=y
+CONFIG_FREERTOS_USE_STATS_FORMATTING_FUNCTIONS=y
+
+# --------------------------------
+# Performance optimization options
+# --------------------------------
+# `lwIP` and `iperf` tasks have serial dependency to each other (i.e. `iperf` must wait for `lwIP`
+# to process the packets). Therefore, you don't gain much performance improvement when running
+# multi core mode. On the other hand, IRAM optimizations have greater effect for single core mode.
+
+# Run FreeRTOS only on the first core
+CONFIG_FREERTOS_UNICORE=y
+
+# Disable watch dog
+CONFIG_ESP_INT_WDT=n
+CONFIG_ESP_TASK_WDT_EN=n
+
+# Enable lwIP IRAM optimization
+CONFIG_LWIP_IRAM_OPTIMIZATION=y
+
+# Enable Ethernet IRAM optimization
+CONFIG_ETH_IRAM_OPTIMIZATION=y
+
+CONFIG_EXAMPLE_ETH_MDC_GPIO=16
+CONFIG_EXAMPLE_ETH_MDIO_GPIO=17
+CONFIG_EXAMPLE_ETH_PHY_RST_GPIO=-1
+CONFIG_EXAMPLE_ETH_PHY_ADDR=0
+
+CONFIG_EXAMPLE_USE_INTERNAL_ETHERNET=y
+CONFIG_EXAMPLE_ETH_PHY_RTL8201=y
+
+CONFIG_ETH_RMII_CLK_INPUT=y
+# CONFIG_ETH_RMII_CLK_OUTPUT is not set
+CONFIG_ETH_RMII_CLK_IN_GPIO=0
diff --git a/examples/ethernet/iperf/sdkconfig.ci.default_w5500 b/examples/ethernet/iperf/sdkconfig.ci.default_w5500
new file mode 100644
index 0000000000..a2ec710628
--- /dev/null
+++ b/examples/ethernet/iperf/sdkconfig.ci.default_w5500
@@ -0,0 +1,38 @@
+# Increase main task stack size
+CONFIG_ESP_MAIN_TASK_STACK_SIZE=7168
+
+# Enable filesystem for console commands history storage
+CONFIG_ESPTOOLPY_FLASHSIZE_4MB=y
+CONFIG_PARTITION_TABLE_CUSTOM=y
+CONFIG_PARTITION_TABLE_CUSTOM_FILENAME="partitions_example.csv"
+CONFIG_PARTITION_TABLE_FILENAME="partitions_example.csv"
+
+# Enable FreeRTOS stats formatting functions, needed for 'tasks' command
+CONFIG_FREERTOS_USE_TRACE_FACILITY=y
+CONFIG_FREERTOS_USE_STATS_FORMATTING_FUNCTIONS=y
+
+# --------------------------------
+# Performance optimization options
+# --------------------------------
+# `lwIP` and `iperf` tasks have serial dependency to each other (i.e. `iperf` must wait for `lwIP`
+# to process the packets). Therefore, you don't gain much performance improvement when running
+# multi core mode. On the other hand, IRAM optimizations have greater effect for single core mode.
+
+# Run FreeRTOS only on the first core
+CONFIG_FREERTOS_UNICORE=y
+
+# Disable watch dog
+CONFIG_ESP_INT_WDT=n
+CONFIG_ESP_TASK_WDT_EN=n
+
+# Enable lwIP IRAM optimization
+CONFIG_LWIP_IRAM_OPTIMIZATION=y
+
+# Enable Ethernet IRAM optimization
+CONFIG_ETH_IRAM_OPTIMIZATION=y
+
+CONFIG_EXAMPLE_USE_SPI_ETHERNET=y
+CONFIG_EXAMPLE_USE_INTERNAL_ETHERNET=n
+CONFIG_EXAMPLE_SPI_ETHERNETS_NUM=1
+CONFIG_EXAMPLE_USE_W5500=y
+CONFIG_EXAMPLE_ETH_SPI_CLOCK_MHZ=20