diff --git a/components/esp_eth/include/esp_eth_driver.h b/components/esp_eth/include/esp_eth_driver.h
index 405138e4e63..b5d51bf3b66 100644
--- a/components/esp_eth/include/esp_eth_driver.h
+++ b/components/esp_eth/include/esp_eth_driver.h
@@ -1,5 +1,5 @@
 /*
- * SPDX-FileCopyrightText: 2019-2025 Espressif Systems (Shanghai) CO LTD
+ * SPDX-FileCopyrightText: 2019-2026 Espressif Systems (Shanghai) CO LTD
  *
  * SPDX-License-Identifier: Apache-2.0
  */
@@ -178,6 +178,8 @@ typedef enum {
     ETH_CMD_S_ALL_MULTICAST,          /*!< Set receive all multicast */
     ETH_CMD_ADD_MAC_FILTER,           /*!< Add MAC filter */
     ETH_CMD_DEL_MAC_FILTER,           /*!< Delete MAC filter */
+    ETH_CMD_S_PHY_MASTER_MODE,        /*!< Set PHY master mode */
+    ETH_CMD_G_PHY_MASTER_MODE,        /*!< Get PHY master mode */
 
     ETH_CMD_CUSTOM_MAC_CMDS = ETH_CMD_CUSTOM_MAC_CMDS_OFFSET, // Offset for start of MAC custom commands
     ETH_CMD_CUSTOM_PHY_CMDS = ETH_CMD_CUSTOM_PHY_CMDS_OFFSET, // Offset for start of PHY custom commands
@@ -383,9 +385,14 @@ esp_err_t esp_eth_transmit_ctrl_vargs(esp_eth_handle_t hdl, void *ctrl, uint32_t
 *                            Preconditions: Ethernet driver needs to be stopped and auto-negotiation disabled.
 * @li @c ETH_CMD_G_DUPLEX_MODE gets current Ethernet link duplex mode.  @c data argument is pointer to memory of eth_duplex_t datatype to which the duplex mode is to be stored.
 * @li @c ETH_CMD_S_PHY_LOOPBACK sets/resets PHY to/from loopback mode. @c data argument is pointer to memory of bool datatype from which the configuration option is read.
+* @li @c ETH_CMD_READ_PHY_REG reads PHY register. @c data argument is pointer to @c esp_eth_phy_reg_rw_data_t containing register address and pointer to store read value.
+* @li @c ETH_CMD_WRITE_PHY_REG writes PHY register. @c data argument is pointer to @c esp_eth_phy_reg_rw_data_t containing register address and pointer to value to write.
 * @li @c ETH_CMD_S_ALL_MULTICAST sets/resets Ethernet interface to/from receive all multicast mode. @c data argument is pointer to memory of bool datatype from which the configuration option is read.
 * @li @c ETH_CMD_ADD_MAC_FILTER adds a MAC address to the MAC filter. @c data argument is pointer to MAC address buffer with expected size of 6 bytes.
 * @li @c ETH_CMD_DEL_MAC_FILTER deletes a MAC address from the MAC filter. @c data argument is pointer to MAC address buffer with expected size of 6 bytes.
+* @li @c ETH_CMD_S_PHY_MASTER_MODE sets PHY master/slave mode for 1000BASE-T. @c data argument is pointer to memory of bool datatype from which the configuration option is read (true = master, false = slave).
+*                           Preconditions: Ethernet driver needs to be stopped. Required before forcing 1000 Mbps speed when auto-negotiation is disabled.
+* @li @c ETH_CMD_G_PHY_MASTER_MODE gets PHY master/slave mode for 1000BASE-T. @c data argument is pointer to memory of bool datatype to which the current configuration is to be stored (true = master, false = slave).
 *
 * @li Note that additional control commands may be available for specific MAC or PHY chips. Please consult specific MAC or PHY documentation or driver code.
 */
diff --git a/components/esp_eth/include/esp_eth_phy.h b/components/esp_eth/include/esp_eth_phy.h
index a5a0d14e85d..6ad829e6306 100644
--- a/components/esp_eth/include/esp_eth_phy.h
+++ b/components/esp_eth/include/esp_eth_phy.h
@@ -1,5 +1,5 @@
 /*
- * SPDX-FileCopyrightText: 2019-2025 Espressif Systems (Shanghai) CO LTD
+ * SPDX-FileCopyrightText: 2019-2026 Espressif Systems (Shanghai) CO LTD
  *
  * SPDX-License-Identifier: Apache-2.0
  */
@@ -267,6 +267,40 @@ struct esp_eth_phy_s {
     *
     */
     esp_err_t (*del)(esp_eth_phy_t *phy);
+
+    /**
+    * @brief Sets PHY master/slave mode for 1000BASE-T
+    *
+    * @note This configuration is required before forcing 1000 Mbps speed mode when auto-negotiation
+    *       is disabled. One link partner must be configured as master and the other as slave.
+    * @note This function pointer may be set to NULL when the PHY does not support 1000BASE-T.
+    *
+    * @param[in] phy: Ethernet PHY instance
+    * @param[in] master: set true to configure as master; set false to configure as slave
+    *
+    * @return
+    *      - ESP_OK: PHY instance master/slave mode has been configured successfully
+    *      - ESP_ERR_NOT_SUPPORTED: PHY does not support 1000BASE-T
+    *      - ESP_FAIL: PHY instance master/slave mode configuration failed because some error occurred
+    *
+    */
+    esp_err_t (*set_master_mode)(esp_eth_phy_t *phy, bool master);
+
+    /**
+    * @brief Gets PHY master/slave mode for 1000BASE-T
+    *
+    * @note This function pointer may be set to NULL when the PHY does not support 1000BASE-T.
+    *
+    * @param[in] phy: Ethernet PHY instance
+    * @param[out] master: set to true if PHY is configured as master; false if configured as slave
+    *
+    * @return
+    *      - ESP_OK: PHY instance master/slave mode has been read successfully
+    *      - ESP_ERR_NOT_SUPPORTED: PHY does not support 1000BASE-T
+    *      - ESP_FAIL: PHY instance master/slave mode read failed because some error occurred
+    *
+    */
+    esp_err_t (*get_master_mode)(esp_eth_phy_t *phy, bool *master);
 };
 
 /**
diff --git a/components/esp_eth/include/esp_eth_phy_802_3.h b/components/esp_eth/include/esp_eth_phy_802_3.h
index 57a2ff901ee..06b7ac81f5a 100644
--- a/components/esp_eth/include/esp_eth_phy_802_3.h
+++ b/components/esp_eth/include/esp_eth_phy_802_3.h
@@ -1,5 +1,5 @@
 /*
- * SPDX-FileCopyrightText: 2022-2025 Espressif Systems (Shanghai) CO LTD
+ * SPDX-FileCopyrightText: 2022-2026 Espressif Systems (Shanghai) CO LTD
  *
  * SPDX-License-Identifier: Apache-2.0
  */
@@ -162,6 +162,32 @@ esp_err_t esp_eth_phy_802_3_set_speed(phy_802_3_t *phy_802_3, eth_speed_t speed)
  */
 esp_err_t esp_eth_phy_802_3_set_duplex(phy_802_3_t *phy_802_3, eth_duplex_t duplex);
 
+/**
+ * @brief Set Ethernet PHY master/slave mode for 1000BASE-T
+ *
+ * @note Required before forcing 1000 Mbps speed when auto-negotiation is disabled.
+ *
+ * @param phy_802_3 IEEE 802.3 PHY object infostructure
+ * @param master set true to configure as master; set false to configure as slave
+ * @return
+ *      - ESP_OK: Ethernet PHY master/slave mode set successfully
+ *      - ESP_ERR_NOT_SUPPORTED: PHY does not support 1000BASE-T
+ *      - ESP_FAIL: Set Ethernet PHY master/slave mode failed because some error occurred
+ */
+esp_err_t esp_eth_phy_802_3_set_master_mode(phy_802_3_t *phy_802_3, bool master);
+
+/**
+ * @brief Get Ethernet PHY master/slave mode for 1000BASE-T
+ *
+ * @param phy_802_3 IEEE 802.3 PHY object infostructure
+ * @param master set to true if PHY is configured as master; false if configured as slave
+ * @return
+ *      - ESP_OK: Ethernet PHY master/slave mode read successfully
+ *      - ESP_ERR_NOT_SUPPORTED: PHY does not support 1000BASE-T
+ *      - ESP_FAIL: Get Ethernet PHY master/slave mode failed because some error occurred
+ */
+esp_err_t esp_eth_phy_802_3_get_master_mode(phy_802_3_t *phy_802_3, bool *master);
+
 /**
  * @brief Set Ethernet PHY link status
  *
diff --git a/components/esp_eth/include/eth_phy_802_3_regs.h b/components/esp_eth/include/eth_phy_802_3_regs.h
index e9091f63a39..a600daa2ab3 100644
--- a/components/esp_eth/include/eth_phy_802_3_regs.h
+++ b/components/esp_eth/include/eth_phy_802_3_regs.h
@@ -161,10 +161,13 @@ typedef union {
  */
 typedef union {
     struct {
-        uint32_t reserved0 : 8;        /*!< Reserved */
-        uint32_t base1000_t : 1;       /*!< 1000Base-T half duplex support */
-        uint32_t base1000_t_fd : 1;    /*!< 1000Base-T full duplex support */
-        uint32_t reserved1 : 6;        /*!< Reserved */
+        uint32_t reserved0 : 8;             /*!< Reserved */
+        uint32_t base1000_t : 1;            /*!< 1000Base-T half duplex support */
+        uint32_t base1000_t_fd : 1;         /*!< 1000Base-T full duplex support */
+        uint32_t port_type : 1;             /*!< Port type: multiport device(1), single-port device(0) */
+        uint32_t master_slave_cfg : 1;      /*!< Master-slave config value: master(1), slave(0) */
+        uint32_t master_slave_manual : 1;   /*!< Master-slave manual configuration enable */
+        uint32_t test_mode : 3;             /*!< Transmitter test mode */
     };
     uint32_t val;
 } gbcr_reg_t;
diff --git a/components/esp_eth/src/esp_eth.c b/components/esp_eth/src/esp_eth.c
index 76dab829d20..112a15109bc 100644
--- a/components/esp_eth/src/esp_eth.c
+++ b/components/esp_eth/src/esp_eth.c
@@ -1,5 +1,5 @@
 /*
- * SPDX-FileCopyrightText: 2019-2025 Espressif Systems (Shanghai) CO LTD
+ * SPDX-FileCopyrightText: 2019-2026 Espressif Systems (Shanghai) CO LTD
  *
  * SPDX-License-Identifier: Apache-2.0
  */
@@ -508,6 +508,18 @@ esp_err_t esp_eth_ioctl(esp_eth_handle_t hdl, esp_eth_io_cmd_t cmd, void *data)
         ESP_GOTO_ON_FALSE(data, ESP_ERR_INVALID_ARG, err, TAG, "can't set loopback to null");
         ESP_GOTO_ON_ERROR(phy->loopback(phy, *(bool *)data), err, TAG, "configuration of phy loopback mode failed");
         break;
+    case ETH_CMD_S_PHY_MASTER_MODE:
+        ESP_GOTO_ON_FALSE(data, ESP_ERR_INVALID_ARG, err, TAG, "can't set master mode to null");
+        ESP_GOTO_ON_FALSE(phy->set_master_mode != NULL, ESP_ERR_NOT_SUPPORTED, err, TAG, "set PHY master mode not supported");
+        // check if driver is stopped; configuration should be changed only when transmitting/receiving is not active
+        ESP_GOTO_ON_FALSE(atomic_load(&eth_driver->fsm) == ESP_ETH_FSM_STOP, ESP_ERR_INVALID_STATE, err, TAG, "link configuration is only allowed when driver is stopped");
+        ESP_GOTO_ON_ERROR(phy->set_master_mode(phy, *(bool *)data), err, TAG, "set PHY master mode failed");
+        break;
+    case ETH_CMD_G_PHY_MASTER_MODE:
+        ESP_GOTO_ON_FALSE(data, ESP_ERR_INVALID_ARG, err, TAG, "no mem to store master mode value");
+        ESP_GOTO_ON_FALSE(phy->get_master_mode != NULL, ESP_ERR_NOT_SUPPORTED, err, TAG, "get PHY master mode not supported");
+        ESP_GOTO_ON_ERROR(phy->get_master_mode(phy, (bool *)data), err, TAG, "get PHY master mode failed");
+        break;
     case ETH_CMD_READ_PHY_REG: {
         uint32_t phy_addr;
         ESP_GOTO_ON_FALSE(data, ESP_ERR_INVALID_ARG, err, TAG, "invalid register read/write info");
diff --git a/components/esp_eth/src/openeth/esp_openeth.h b/components/esp_eth/src/openeth/esp_openeth.h
index 8fe99d92e72..1cef94dca87 100644
--- a/components/esp_eth/src/openeth/esp_openeth.h
+++ b/components/esp_eth/src/openeth/esp_openeth.h
@@ -1,5 +1,5 @@
 /*
- * SPDX-FileCopyrightText: 2023-2024 Espressif Systems (Shanghai) CO LTD
+ * SPDX-FileCopyrightText: 2023-2026 Espressif Systems (Shanghai) CO LTD
  *
  * SPDX-License-Identifier: Apache-2.0
  */
@@ -13,7 +13,11 @@
  * we can reuse the Wifi interrupt source for ethernet, since QEMU doesn't emulate Wifi (yet).
  * We also map the EMAC registers to an unused address range.
  */
- #if SOC_WIFI_SUPPORTED && !SOC_EMAC_SUPPORTED
+#if SOC_WIFI_SUPPORTED && !SOC_EMAC_SUPPORTED
 #define ETS_ETH_MAC_INTR_SOURCE     ETS_WIFI_MAC_INTR_SOURCE
 #define DR_REG_EMAC_BASE            0x600CD000
 #endif
+
+#if SOC_EMAC_SUPPORT_1000M
+#define DR_REG_EMAC_BASE            DR_REG_GMAC_BASE
+#endif
diff --git a/components/esp_eth/src/phy/esp_eth_phy_802_3.c b/components/esp_eth/src/phy/esp_eth_phy_802_3.c
index a7a10d6aa8a..7b708e464c0 100644
--- a/components/esp_eth/src/phy/esp_eth_phy_802_3.c
+++ b/components/esp_eth/src/phy/esp_eth_phy_802_3.c
@@ -88,6 +88,18 @@ static esp_err_t set_duplex(esp_eth_phy_t *phy, eth_duplex_t duplex)
     return esp_eth_phy_802_3_set_duplex(phy_802_3, duplex);
 }
 
+static esp_err_t set_master_mode(esp_eth_phy_t *phy, bool master)
+{
+    phy_802_3_t *phy_802_3 = esp_eth_phy_into_phy_802_3(phy);
+    return esp_eth_phy_802_3_set_master_mode(phy_802_3, master);
+}
+
+static esp_err_t get_master_mode(esp_eth_phy_t *phy, bool *master)
+{
+    phy_802_3_t *phy_802_3 = esp_eth_phy_into_phy_802_3(phy);
+    return esp_eth_phy_802_3_get_master_mode(phy_802_3, master);
+}
+
 static esp_err_t set_link(esp_eth_phy_t *phy, eth_link_t link)
 {
     phy_802_3_t *phy_802_3 = esp_eth_phy_into_phy_802_3(phy);
@@ -393,6 +405,33 @@ err:
 
 }
 
+/**
+ * @brief Check whether the PHY supports 1000BASE-T
+ *
+ * @param[in] phy_802_3 IEEE 802.3 PHY object
+ * @param[out] is_1000_capable set to true if PHY supports 1000BASE-T
+ * @return
+ *      - ESP_OK: capability checked successfully
+ *      - ESP_FAIL: failed to read PHY registers
+ */
+static esp_err_t phy_802_3_is_1000_capable(phy_802_3_t *phy_802_3, bool *is_1000_capable)
+{
+    esp_err_t ret = ESP_OK;
+    esp_eth_mediator_t *eth = phy_802_3->eth;
+
+    *is_1000_capable = false;
+    bmsr_reg_t bmsr;
+    ESP_GOTO_ON_ERROR(eth->phy_reg_read(eth, phy_802_3->addr, ETH_PHY_BMSR_REG_ADDR, &(bmsr.val)), err, TAG, "read BMSR failed");
+    if (bmsr.ext_status) {
+        exsr_reg_t exsr;
+        ESP_GOTO_ON_ERROR(eth->phy_reg_read(eth, phy_802_3->addr, ETH_PHY_EXSR_REG_ADDR, &(exsr.val)), err, TAG, "read EXSR failed");
+        *is_1000_capable = exsr.base1000_t || exsr.base1000_t_fd;
+    }
+    return ESP_OK;
+err:
+    return ret;
+}
+
 esp_err_t esp_eth_phy_802_3_set_speed(phy_802_3_t *phy_802_3, eth_speed_t speed)
 {
     esp_err_t ret = ESP_OK;
@@ -404,19 +443,10 @@ esp_err_t esp_eth_phy_802_3_set_speed(phy_802_3_t *phy_802_3, eth_speed_t speed)
     /* Set speed */
     bmcr_reg_t bmcr;
     ESP_GOTO_ON_ERROR(eth->phy_reg_read(eth, phy_802_3->addr, ETH_PHY_BMCR_REG_ADDR, &(bmcr.val)), err, TAG, "read BMCR failed");
-    bmsr_reg_t bmsr;
-    ESP_GOTO_ON_ERROR(eth->phy_reg_read(eth, phy_802_3->addr, ETH_PHY_BMSR_REG_ADDR, &(bmsr.val)), err, TAG, "read BMSR failed");
     bool is_1000_capable = false;
-    if (bmsr.ext_status) {
-        exsr_reg_t exsr;
-        ESP_GOTO_ON_ERROR(eth->phy_reg_read(eth, phy_802_3->addr, ETH_PHY_EXSR_REG_ADDR, &(exsr.val)), err, TAG, "read EXSR failed");
-        is_1000_capable = exsr.base1000_t || exsr.base1000_t_fd;
-    }
+    ESP_GOTO_ON_ERROR(phy_802_3_is_1000_capable(phy_802_3, &is_1000_capable), err, TAG, "check 1000BASE-T capability failed");
     if (speed == ETH_SPEED_1000M) {
-        if (!is_1000_capable) {
-            ret = ESP_ERR_NOT_SUPPORTED;
-            goto err;
-        }
+        ESP_GOTO_ON_FALSE(is_1000_capable, ESP_ERR_NOT_SUPPORTED, err, TAG, "PHY does not support 1000BASE-T");
         bmcr.speed_1000 = 1;
         bmcr.speed_select = 0;
     } else {
@@ -454,6 +484,47 @@ err:
     return ret;
 }
 
+esp_err_t esp_eth_phy_802_3_set_master_mode(phy_802_3_t *phy_802_3, bool master)
+{
+    esp_err_t ret = ESP_OK;
+    esp_eth_mediator_t *eth = phy_802_3->eth;
+
+    bool is_1000_capable = false;
+    ESP_GOTO_ON_ERROR(phy_802_3_is_1000_capable(phy_802_3, &is_1000_capable), err, TAG, "check 1000BASE-T capability failed");
+    ESP_GOTO_ON_FALSE(is_1000_capable, ESP_ERR_NOT_SUPPORTED, err, TAG, "PHY does not support 1000BASE-T");
+
+    /* Configure master/slave mode in 1000BASE-T Control register (IEEE 802.3 Clause 40) */
+    gbcr_reg_t gbcr;
+    ESP_GOTO_ON_ERROR(eth->phy_reg_read(eth, phy_802_3->addr, ETH_PHY_GBCR_REG_ADDR, &(gbcr.val)), err, TAG, "read GBCR failed");
+    gbcr.master_slave_manual = 1;
+    gbcr.master_slave_cfg = master ? 1 : 0;
+    ESP_GOTO_ON_ERROR(eth->phy_reg_write(eth, phy_802_3->addr, ETH_PHY_GBCR_REG_ADDR, gbcr.val), err, TAG, "write GBCR failed");
+
+    return ESP_OK;
+err:
+    return ret;
+}
+
+esp_err_t esp_eth_phy_802_3_get_master_mode(phy_802_3_t *phy_802_3, bool *master)
+{
+    esp_err_t ret = ESP_OK;
+    esp_eth_mediator_t *eth = phy_802_3->eth;
+
+    ESP_GOTO_ON_FALSE(master, ESP_ERR_INVALID_ARG, err, TAG, "master can't be null");
+
+    bool is_1000_capable = false;
+    ESP_GOTO_ON_ERROR(phy_802_3_is_1000_capable(phy_802_3, &is_1000_capable), err, TAG, "check 1000BASE-T capability failed");
+    ESP_GOTO_ON_FALSE(is_1000_capable, ESP_ERR_NOT_SUPPORTED, err, TAG, "PHY does not support 1000BASE-T");
+
+    gbcr_reg_t gbcr;
+    ESP_GOTO_ON_ERROR(eth->phy_reg_read(eth, phy_802_3->addr, ETH_PHY_GBCR_REG_ADDR, &(gbcr.val)), err, TAG, "read GBCR failed");
+    *master = gbcr.master_slave_cfg;
+
+    return ESP_OK;
+err:
+    return ret;
+}
+
 esp_err_t esp_eth_phy_802_3_set_link(phy_802_3_t *phy_802_3, eth_link_t link)
 {
     esp_err_t ret = ESP_OK;
@@ -745,6 +816,8 @@ esp_err_t esp_eth_phy_802_3_obj_config_init(phy_802_3_t *phy_802_3, const eth_ph
     phy_802_3->parent.loopback = loopback;
     phy_802_3->parent.set_speed = set_speed;
     phy_802_3->parent.set_duplex = set_duplex;
+    phy_802_3->parent.set_master_mode = set_master_mode;
+    phy_802_3->parent.get_master_mode = get_master_mode;
     phy_802_3->parent.del = del;
     phy_802_3->parent.set_link = set_link;
     phy_802_3->parent.get_link = get_link;
diff --git a/components/esp_eth/test_apps/.build-test-rules.yml b/components/esp_eth/test_apps/.build-test-rules.yml
index 7f37c8910ba..823edca42f2 100644
--- a/components/esp_eth/test_apps/.build-test-rules.yml
+++ b/components/esp_eth/test_apps/.build-test-rules.yml
@@ -2,8 +2,8 @@
 
 components/esp_eth/test_apps:
   enable:
-    - if: IDF_TARGET in ["esp32", "esp32p4"]
-      reason: ESP32 and ESP32P4 have internal EMAC. SPI Ethernet runners are based on ESP32.
+    - if: IDF_TARGET in ["esp32", "esp32p4", "esp32s31"]
+      reason: ESP32, ESP32P4 and ESP32S31 have internal EMAC.
   depends_components:
     - esp_eth
     - esp_http_client
diff --git a/components/esp_eth/test_apps/README.md b/components/esp_eth/test_apps/README.md
index b31dd517e56..2194cf0077e 100644
--- a/components/esp_eth/test_apps/README.md
+++ b/components/esp_eth/test_apps/README.md
@@ -1,5 +1,5 @@
-| Supported Targets | ESP32 | ESP32-P4 |
-| ----------------- | ----- | -------- |
+| Supported Targets | ESP32 | ESP32-P4 | ESP32-S31 |
+| ----------------- | ----- | -------- | --------- |
 
 # Ethernet Test
 
diff --git a/components/esp_eth/test_apps/pytest_esp_eth.py b/components/esp_eth/test_apps/pytest_esp_eth.py
index 42d930dfc97..13a6cadcc8e 100644
--- a/components/esp_eth/test_apps/pytest_esp_eth.py
+++ b/components/esp_eth/test_apps/pytest_esp_eth.py
@@ -104,117 +104,15 @@ def test_esp32p4_emac_clko(dut: IdfDut) -> None:
     dut.run_all_single_board_cases(group='esp_emac_clk_out')
 
 
-# ----------- LAN8720 -----------
-@pytest.mark.eth_lan8720
+# ----------- YT8531 ESP32S31 -----------
 @pytest.mark.parametrize(
-    'config',
+    'config, target',
     [
-        'default_lan8720',
+        pytest.param('default_yt8531_esp32s31', 'esp32s31', marks=[pytest.mark.eth_yt8531]),
     ],
-    indirect=True,
+    indirect=['target'],
 )
-@idf_parametrize('target', ['esp32'], indirect=['target'])
-def test_esp_eth_lan8720(dut: IdfDut, eth_test_runner: 'EthTestRunner') -> None:
-    eth_test_runner.run_ethernet_test_apps(dut)
-    dut.serial.hard_reset()
-    eth_test_runner.run_ethernet_l2_test(dut)
-
-
-# ----------- RTL8201 -----------
-@pytest.mark.eth_rtl8201
-@pytest.mark.parametrize(
-    'config',
-    [
-        'default_rtl8201',
-    ],
-    indirect=True,
-)
-@idf_parametrize('target', ['esp32'], indirect=['target'])
-def test_esp_eth_rtl8201(dut: IdfDut, eth_test_runner: 'EthTestRunner') -> None:
-    eth_test_runner.run_ethernet_test_apps(dut)
-    dut.serial.hard_reset()
-    eth_test_runner.run_ethernet_l2_test(dut)
-
-
-# ----------- KSZ8041 -----------
-@pytest.mark.eth_ksz8041
-@pytest.mark.parametrize(
-    'config',
-    [
-        'default_ksz8041',
-    ],
-    indirect=True,
-)
-@idf_parametrize('target', ['esp32'], indirect=['target'])
-def test_esp_eth_ksz8041(dut: IdfDut, eth_test_runner: 'EthTestRunner') -> None:
-    eth_test_runner.run_ethernet_test_apps(dut)
-    dut.serial.hard_reset()
-    eth_test_runner.run_ethernet_l2_test(dut)
-
-
-# ----------- DP83848 -----------
-@pytest.mark.eth_dp83848
-@pytest.mark.parametrize(
-    'config',
-    [
-        'default_dp83848',
-    ],
-    indirect=True,
-)
-@idf_parametrize('target', ['esp32'], indirect=['target'])
-def test_esp_eth_dp83848(dut: IdfDut, eth_test_runner: 'EthTestRunner') -> None:
-    eth_test_runner.run_ethernet_test_apps(dut)
-    dut.serial.hard_reset()
-    eth_test_runner.run_ethernet_l2_test(dut)
-
-
-# ----------- W5500 -----------
-@pytest.mark.eth_w5500
-@pytest.mark.parametrize(
-    'config',
-    [
-        'default_w5500',
-    ],
-    indirect=True,
-)
-@idf_parametrize('target', ['esp32'], indirect=['target'])
-def test_esp_eth_w5500(dut: IdfDut, eth_test_runner: 'EthTestRunner') -> None:
-    eth_test_runner.run_ethernet_test_apps(dut)
-    dut.serial.hard_reset()
-    eth_test_runner.run_ethernet_l2_test(dut)
-    dut.serial.hard_reset()
-    eth_test_runner.run_ethernet_heap_alloc_test(dut)
-
-
-# ----------- KSZ8851SNL -----------
-@pytest.mark.eth_ksz8851snl
-@pytest.mark.parametrize(
-    'config',
-    [
-        'default_ksz8851snl',
-    ],
-    indirect=True,
-)
-@idf_parametrize('target', ['esp32'], indirect=['target'])
-def test_esp_eth_ksz8851snl(dut: IdfDut, eth_test_runner: 'EthTestRunner') -> None:
-    eth_test_runner.run_ethernet_test_apps(dut)
-    dut.serial.hard_reset()
-    eth_test_runner.run_ethernet_l2_test(dut)
-    dut.serial.hard_reset()
-    eth_test_runner.run_ethernet_heap_alloc_test(dut)
-
-
-# ----------- DM9051 -----------
-@pytest.mark.eth_dm9051
-@pytest.mark.parametrize(
-    'config',
-    [
-        'default_dm9051',
-    ],
-    indirect=True,
-)
-@idf_parametrize('target', ['esp32'], indirect=['target'])
-def test_esp_eth_dm9051(dut: IdfDut, eth_test_runner: 'EthTestRunner') -> None:
+def test_esp32s31_ethernet(dut: IdfDut, eth_test_runner: 'EthTestRunner') -> None:
     eth_test_runner.run_ethernet_test_apps(dut)
     dut.serial.hard_reset()
     eth_test_runner.run_ethernet_l2_test(dut)
diff --git a/components/esp_eth/test_apps/sdkconfig.ci.default_dm9051 b/components/esp_eth/test_apps/sdkconfig.ci.default_dm9051
deleted file mode 100644
index 8a6c58bc861..00000000000
--- a/components/esp_eth/test_apps/sdkconfig.ci.default_dm9051
+++ /dev/null
@@ -1,24 +0,0 @@
-CONFIG_IDF_TARGET="esp32"
-
-CONFIG_UNITY_ENABLE_FIXTURE=y
-CONFIG_UNITY_ENABLE_IDF_TEST_RUNNER=y
-CONFIG_ETH_USE_ESP32_EMAC=y
-CONFIG_ESP_TASK_WDT_EN=n
-
-# Config Ethernet Init
-CONFIG_ETHERNET_SPI_SUPPORT=y
-CONFIG_ETHERNET_INTERNAL_SUPPORT=n
-CONFIG_ETHERNET_SPI_DEV0_DM9051=y
-CONFIG_ETHERNET_SPI_DEV1_NONE=y
-CONFIG_ETHERNET_SPI_CLOCK_MHZ=20
-CONFIG_ETHERNET_DEFAULT_EVENT_HANDLER=n
-
-# SPI specific test configuration
-CONFIG_ETH_TEST_MAC_ADDR_UI=n
-CONFIG_ETH_TEST_PHY_ADDRESS_DISABLED=y
-CONFIG_ETH_TEST_STRESS_TEST_TASK_PRIO=20
-
-# W5500 specific test configuration
-# FILL_RX_BUFFER_ITERATIONS = 16384 / 1522 = 10.8
-CONFIG_ETH_TEST_FILL_RX_BUFFER_ITERATIONS=11
-CONFIG_ETH_TEST_10MB_LOOPBACK_DISABLED=y
diff --git a/components/esp_eth/test_apps/sdkconfig.ci.default_dp83848 b/components/esp_eth/test_apps/sdkconfig.ci.default_dp83848
deleted file mode 100644
index b1a9cf6d4e9..00000000000
--- a/components/esp_eth/test_apps/sdkconfig.ci.default_dp83848
+++ /dev/null
@@ -1,19 +0,0 @@
-CONFIG_IDF_TARGET="esp32"
-
-CONFIG_UNITY_ENABLE_FIXTURE=y
-CONFIG_UNITY_ENABLE_IDF_TEST_RUNNER=y
-CONFIG_ETH_USE_ESP32_EMAC=y
-CONFIG_ESP_TASK_WDT_EN=n
-
-# Config Ethernet Init
-CONFIG_ETHERNET_INTERNAL_SUPPORT=y
-CONFIG_ETHERNET_PHY_DP83848=y
-CONFIG_ETHERNET_PHY_INTERFACE_RMII=y
-CONFIG_ETHERNET_RMII_CLK_OUTPUT=y
-CONFIG_ETHERNET_RMII_CLK_EXT_LOOPBACK_EN=n
-CONFIG_ETHERNET_RMII_CLK_GPIO=17
-CONFIG_ETHERNET_DEFAULT_EVENT_HANDLER=n
-
-# DP83848 specific test configuration
-CONFIG_ETH_TEST_FILL_RX_BUFFER_ITERATIONS=10
-CONFIG_ETH_TEST_LOOPBACK_WITH_AUTONEGOTIATION_DISABLED=y
diff --git a/components/esp_eth/test_apps/sdkconfig.ci.default_ksz8041 b/components/esp_eth/test_apps/sdkconfig.ci.default_ksz8041
deleted file mode 100644
index 4ef04aaa164..00000000000
--- a/components/esp_eth/test_apps/sdkconfig.ci.default_ksz8041
+++ /dev/null
@@ -1,15 +0,0 @@
-CONFIG_IDF_TARGET="esp32"
-
-CONFIG_UNITY_ENABLE_FIXTURE=y
-CONFIG_UNITY_ENABLE_IDF_TEST_RUNNER=y
-CONFIG_ETH_USE_ESP32_EMAC=y
-CONFIG_ESP_TASK_WDT_EN=n
-
-# Config Ethernet Init
-CONFIG_ETHERNET_INTERNAL_SUPPORT=y
-CONFIG_ETHERNET_PHY_KSZ80XX=y
-CONFIG_ETHERNET_DEFAULT_EVENT_HANDLER=n
-
-# KSZ8041 specific test configuration
-CONFIG_ETH_TEST_FILL_RX_BUFFER_ITERATIONS=10
-CONFIG_ETH_TEST_10MB_LOOPBACK_DISABLED=y
diff --git a/components/esp_eth/test_apps/sdkconfig.ci.default_ksz8851snl b/components/esp_eth/test_apps/sdkconfig.ci.default_ksz8851snl
deleted file mode 100644
index 0c309d12ed5..00000000000
--- a/components/esp_eth/test_apps/sdkconfig.ci.default_ksz8851snl
+++ /dev/null
@@ -1,23 +0,0 @@
-CONFIG_IDF_TARGET="esp32"
-
-CONFIG_UNITY_ENABLE_FIXTURE=y
-CONFIG_UNITY_ENABLE_IDF_TEST_RUNNER=y
-CONFIG_ETH_USE_ESP32_EMAC=y
-CONFIG_ESP_TASK_WDT_EN=n
-
-# Config Ethernet Init
-CONFIG_ETHERNET_SPI_SUPPORT=y
-CONFIG_ETHERNET_INTERNAL_SUPPORT=n
-CONFIG_ETHERNET_SPI_DEV0_KSZ8851SNL=y
-CONFIG_ETHERNET_SPI_DEV1_NONE=y
-CONFIG_ETHERNET_SPI_CLOCK_MHZ=20
-CONFIG_ETHERNET_DEFAULT_EVENT_HANDLER=n
-
-# SPI specific test configuration
-CONFIG_ETH_TEST_MAC_ADDR_UI=n
-CONFIG_ETH_TEST_PHY_ADDRESS_DISABLED=y
-CONFIG_ETH_TEST_STRESS_TEST_TASK_PRIO=20
-
-# KSZ8851SNL specific test configuration
-# FILL_RX_BUFFER_ITERATIONS = 12288 / 1522 = 8.1
-CONFIG_ETH_TEST_FILL_RX_BUFFER_ITERATIONS=9
diff --git a/components/esp_eth/test_apps/sdkconfig.ci.default_lan8720 b/components/esp_eth/test_apps/sdkconfig.ci.default_lan8720
deleted file mode 100644
index b6ed64ad58c..00000000000
--- a/components/esp_eth/test_apps/sdkconfig.ci.default_lan8720
+++ /dev/null
@@ -1,21 +0,0 @@
-CONFIG_IDF_TARGET="esp32"
-
-CONFIG_UNITY_ENABLE_FIXTURE=y
-CONFIG_UNITY_ENABLE_IDF_TEST_RUNNER=y
-CONFIG_ETH_USE_ESP32_EMAC=y
-CONFIG_ESP_TASK_WDT_EN=n
-
-# interface configuration
-CONFIG_ETHERNET_INTERNAL_SUPPORT=y
-CONFIG_ETHERNET_PHY_LAN87XX=y
-CONFIG_ETHERNET_PHY_INTERFACE_RMII=y
-CONFIG_ETHERNET_RMII_CLK_OUTPUT=y
-CONFIG_ETHERNET_RMII_CLK_EXT_LOOPBACK_EN=n
-CONFIG_ETHERNET_RMII_CLK_GPIO=17
-CONFIG_ETHERNET_PHY_ADDR=0
-CONFIG_ETHERNET_DEFAULT_EVENT_HANDLER=n
-
-# LAN8720 specific test configuration
-CONFIG_ETH_TEST_FILL_RX_BUFFER_ITERATIONS=10
-CONFIG_ETH_TEST_LOOPBACK_WITH_AUTONEGOTIATION_DISABLED=y
-CONFIG_ETH_TEST_LAN8720_ERRATA_ENABLED=y
diff --git a/components/esp_eth/test_apps/sdkconfig.ci.default_rtl8201 b/components/esp_eth/test_apps/sdkconfig.ci.default_rtl8201
deleted file mode 100644
index 545e9154a42..00000000000
--- a/components/esp_eth/test_apps/sdkconfig.ci.default_rtl8201
+++ /dev/null
@@ -1,20 +0,0 @@
-CONFIG_IDF_TARGET="esp32"
-
-CONFIG_UNITY_ENABLE_FIXTURE=y
-CONFIG_UNITY_ENABLE_IDF_TEST_RUNNER=y
-CONFIG_ETH_USE_ESP32_EMAC=y
-CONFIG_ESP_TASK_WDT_EN=n
-
-# Config Ethernet Init
-CONFIG_ETHERNET_PHY_RTL8201=y
-CONFIG_ETHERNET_INTERNAL_SUPPORT=y
-CONFIG_ETHERNET_RMII_CLK_INPUT=y
-CONFIG_ETHERNET_MDC_GPIO=16
-CONFIG_ETHERNET_MDIO_GPIO=17
-CONFIG_ETHERNET_PHY_RST_GPIO=-1
-CONFIG_ETHERNET_PHY_ADDR=0
-CONFIG_ETHERNET_DEFAULT_EVENT_HANDLER=n
-
-# RTL8201 specific test configuration
-CONFIG_ETH_TEST_FILL_RX_BUFFER_ITERATIONS=10
-CONFIG_ETH_TEST_LOOPBACK_WITH_AUTONEGOTIATION_DISABLED=y
diff --git a/components/esp_eth/test_apps/sdkconfig.ci.default_w5500 b/components/esp_eth/test_apps/sdkconfig.ci.default_w5500
deleted file mode 100644
index 5dcd27f41b3..00000000000
--- a/components/esp_eth/test_apps/sdkconfig.ci.default_w5500
+++ /dev/null
@@ -1,25 +0,0 @@
-CONFIG_IDF_TARGET="esp32"
-
-CONFIG_UNITY_ENABLE_FIXTURE=y
-CONFIG_UNITY_ENABLE_IDF_TEST_RUNNER=y
-CONFIG_ETH_USE_ESP32_EMAC=y
-CONFIG_ESP_TASK_WDT_EN=n
-
-# Config Ethernet Init
-CONFIG_ETHERNET_SPI_SUPPORT=y
-CONFIG_ETHERNET_INTERNAL_SUPPORT=n
-CONFIG_ETHERNET_SPI_DEV0_W5500=y
-CONFIG_ETHERNET_SPI_DEV1_NONE=y
-CONFIG_ETHERNET_SPI_CLOCK_MHZ=20
-CONFIG_ETHERNET_DEFAULT_EVENT_HANDLER=n
-
-# SPI specific test configuration
-CONFIG_ETH_TEST_MAC_ADDR_UI=n
-CONFIG_ETH_TEST_PHY_ADDRESS_DISABLED=y
-CONFIG_ETH_TEST_STRESS_TEST_TASK_PRIO=20
-
-# W5500 specific test configuration
-# FILL_RX_BUFFER_ITERATIONS = 16384 / 1522 = 10.8
-CONFIG_ETH_TEST_FILL_RX_BUFFER_ITERATIONS=11
-CONFIG_ETH_TEST_LOOPBACK_DISABLED=y
-CONFIG_ETH_TEST_W5500_IP6_MCAST_DEVIATION_ENABLED=y
diff --git a/components/esp_eth/test_apps/sdkconfig.ci.default_yt8531_esp32s31 b/components/esp_eth/test_apps/sdkconfig.ci.default_yt8531_esp32s31
new file mode 100644
index 00000000000..9716724d9ae
--- /dev/null
+++ b/components/esp_eth/test_apps/sdkconfig.ci.default_yt8531_esp32s31
@@ -0,0 +1,21 @@
+CONFIG_IDF_TARGET="esp32s31"
+
+CONFIG_UNITY_ENABLE_FIXTURE=y
+CONFIG_UNITY_ENABLE_IDF_TEST_RUNNER=y
+CONFIG_ETH_USE_ESP32_EMAC=y
+CONFIG_ESP_TASK_WDT_EN=n
+
+# interface configuration
+CONFIG_ETHERNET_INTERNAL_SUPPORT=y
+CONFIG_ETHERNET_PHY_INTERFACE_DEFAULT=y
+CONFIG_ETHERNET_PHY_YT8531=y
+CONFIG_ETHERNET_DEFAULT_EVENT_HANDLER=n
+
+# specific test configuration
+# ESP32S31 has smaller internal Rx FIFO, hence more Rx buffers is used by default
+CONFIG_ETH_TEST_FILL_RX_BUFFER_ITERATIONS=20
+CONFIG_ETH_TEST_LOOPBACK_WITH_AUTONEGOTIATION_DISABLED=y
+CONFIG_ETH_TEST_PHY_1000M_CAPABLE=y
+# ESP32S31 provides only two universally administered MAC addresses in eFuse, so the internal EMAC
+# gets a locally administered ETH MAC by default (see CONFIG_ESP32S31_UNIVERSAL_MAC_ADDRESSES).
+CONFIG_ETH_TEST_MAC_ADDR_UI=n
diff --git a/examples/ethernet/.build-test-rules.yml b/examples/ethernet/.build-test-rules.yml
index eed48efd412..324366ca33d 100644
--- a/examples/ethernet/.build-test-rules.yml
+++ b/examples/ethernet/.build-test-rules.yml
@@ -5,8 +5,6 @@ examples/ethernet/basic:
     - if: INCLUDE_DEFAULT == 1
   disable:
     - if: IDF_TARGET not in ["esp32", "esp32p4", "esp32s31"]
-  disable_test:
-    - if: IDF_TARGET == "esp32s31"
       temporary: true
       reason: lack of runners
   depends_components:
@@ -20,11 +18,10 @@ examples/ethernet/iperf:
     - if: IDF_TARGET in ["esp32h21", "esp32h4"]
       temporary: true
       reason: not supported yet # TODO: [ESP32H21] IDF-11581 [ESP32H4] IDF-12360
-    - if: IDF_TARGET not in ["esp32", "esp32p4"]
+    - if: IDF_TARGET not in ["esp32", "esp32p4", "esp32s31"]
       temporary: true
       reason: lack of runners
   depends_components:
-    - *common_components
     - esp_eth
     - esp_netif
     - lwip
diff --git a/examples/ethernet/basic/main/Kconfig.projbuild b/examples/ethernet/basic/main/Kconfig.projbuild
index b4d3ad1de97..5315c9b160f 100644
--- a/examples/ethernet/basic/main/Kconfig.projbuild
+++ b/examples/ethernet/basic/main/Kconfig.projbuild
@@ -62,11 +62,12 @@ menu "Example Ethernet Configuration"
         config EXAMPLE_ETH_RMII_CLK_EXT_LOOPBACK_IN_GPIO
             depends on EXAMPLE_ETH_RMII_CLK_EXT_LOOPBACK_EN
             int "RMII CLK loopback input GPIO"
-            range ENV_GPIO_RANGE_MIN ENV_GPIO_RANGE_MAX
+            range -1 ENV_GPIO_RANGE_MAX
             default 32 if IDF_TARGET_ESP32P4
             default 0
             help
                 Set GPIO number used by RMII REF CLK input to loopback internally generated RMII CLK output.
+                You can set -1 to use internal REF CLK routing if target supports it.
                 See datasheet for available GPIOs.
 
         if SOC_EMAC_USE_MULTI_IO_MUX
diff --git a/examples/ethernet/basic/pytest_eth_basic.py b/examples/ethernet/basic/pytest_eth_basic.py
index 9341939ab03..2999caf6f5e 100644
--- a/examples/ethernet/basic/pytest_eth_basic.py
+++ b/examples/ethernet/basic/pytest_eth_basic.py
@@ -14,6 +14,7 @@ from pytest_embedded import Dut
         pytest.param('lan8720_esp32', 'esp32', marks=[pytest.mark.eth_lan8720]),
         pytest.param('defaults_esp32p4', 'esp32p4', marks=[pytest.mark.eth_ip101]),
         pytest.param('defaults_esp32p4v1', 'esp32p4', marks=[pytest.mark.eth_ip101, pytest.mark.esp32p4_rev1]),
+        pytest.param('defaults_esp32s31', 'esp32s31', marks=[pytest.mark.eth_yt8531]),
     ],
     indirect=['target'],
 )
diff --git a/examples/ethernet/basic/sdkconfig.ci.alternate_esp32s31 b/examples/ethernet/basic/sdkconfig.ci.alternate_esp32s31
new file mode 100644
index 00000000000..15d59cb98e7
--- /dev/null
+++ b/examples/ethernet/basic/sdkconfig.ci.alternate_esp32s31
@@ -0,0 +1,27 @@
+CONFIG_IDF_TARGET="esp32s31"
+
+CONFIG_ETH_ENABLED=y
+CONFIG_ETH_USE_ESP32_EMAC=y
+
+CONFIG_EXAMPLE_ETH_PHY_INTERFACE_RGMII=y
+CONFIG_EXAMPLE_ETH_RGMII_RX_CLK_GPIO=14
+CONFIG_EXAMPLE_ETH_RGMII_TX_CLK_GPIO=13
+CONFIG_EXAMPLE_ETH_RGMII_PHY_REF_CLK_GPIO=-1
+CONFIG_EXAMPLE_ETH_RGMII_TX_CTL_GPIO=12
+CONFIG_EXAMPLE_ETH_RGMII_TXD0_GPIO=8
+CONFIG_EXAMPLE_ETH_RGMII_TXD1_GPIO=9
+CONFIG_EXAMPLE_ETH_RGMII_TXD2_GPIO=10
+CONFIG_EXAMPLE_ETH_RGMII_TXD3_GPIO=11
+CONFIG_EXAMPLE_ETH_RGMII_RX_CTL_GPIO=15
+CONFIG_EXAMPLE_ETH_RGMII_RXD0_GPIO=19
+CONFIG_EXAMPLE_ETH_RGMII_RXD1_GPIO=18
+CONFIG_EXAMPLE_ETH_RGMII_RXD2_GPIO=17
+CONFIG_EXAMPLE_ETH_RGMII_RXD3_GPIO=16
+
+CONFIG_EXAMPLE_ETH_MDC_GPIO=5
+CONFIG_EXAMPLE_ETH_MDIO_GPIO=6
+CONFIG_EXAMPLE_ETH_PHY_RST_GPIO=7
+
+CONFIG_EXAMPLE_ETH_DEINIT_AFTER_S=10
+
+CONFIG_EXAMPLE_ETH_PHY_RST_TIMING_EN=y
diff --git a/examples/ethernet/basic/sdkconfig.ci.defaults_esp32s31 b/examples/ethernet/basic/sdkconfig.ci.defaults_esp32s31
new file mode 100644
index 00000000000..0655afb0c06
--- /dev/null
+++ b/examples/ethernet/basic/sdkconfig.ci.defaults_esp32s31
@@ -0,0 +1,4 @@
+CONFIG_IDF_TARGET="esp32s31"
+
+CONFIG_ETH_ENABLED=y
+CONFIG_ETH_USE_ESP32_EMAC=y
diff --git a/examples/ethernet/iperf/README.md b/examples/ethernet/iperf/README.md
index 01e454c1f81..5651b9f9c1b 100644
--- a/examples/ethernet/iperf/README.md
+++ b/examples/ethernet/iperf/README.md
@@ -1,5 +1,5 @@
-| Supported Targets | ESP32 | ESP32-P4 |
-| ----------------- | ----- | -------- |
+| Supported Targets | ESP32 | ESP32-P4 | ESP32-S31 |
+| ----------------- | ----- | -------- | --------- |
 
 # Ethernet iperf Example
 
diff --git a/examples/ethernet/iperf/pytest_eth_iperf.py b/examples/ethernet/iperf/pytest_eth_iperf.py
index ac538dc80ab..83fa791c142 100644
--- a/examples/ethernet/iperf/pytest_eth_iperf.py
+++ b/examples/ethernet/iperf/pytest_eth_iperf.py
@@ -1,4 +1,4 @@
-# SPDX-FileCopyrightText: 2022-2025 Espressif Systems (Shanghai) CO LTD
+# SPDX-FileCopyrightText: 2022-2026 Espressif Systems (Shanghai) CO LTD
 # SPDX-License-Identifier: Unlicense OR CC0-1.0
 """
 Test case for iperf example.
@@ -275,3 +275,19 @@ def test_esp_eth_iperf_ksz8851snl(
     log_performance: Callable[[str, object], None],
 ) -> None:
     test_esp_eth_iperf(dut, log_performance, spi_eth=True, udp_rx_bw_lim=10)
+
+
+@pytest.mark.eth_yt8531
+@pytest.mark.parametrize(
+    'config',
+    [
+        'default_yt8531_esp32s31',
+    ],
+    indirect=True,
+)
+@idf_parametrize('target', ['esp32s31'], indirect=['target'])
+def test_esp_eth_iperf_yt8531(
+    dut: Dut,
+    log_performance: Callable[[str, object], None],
+) -> None:
+    test_esp_eth_iperf(dut, log_performance)
diff --git a/examples/ethernet/iperf/sdkconfig.ci.default_dm9051 b/examples/ethernet/iperf/sdkconfig.ci.default_dm9051
index ce5cc7e7f8f..2c3cac8d5fc 100644
--- a/examples/ethernet/iperf/sdkconfig.ci.default_dm9051
+++ b/examples/ethernet/iperf/sdkconfig.ci.default_dm9051
@@ -1,40 +1,4 @@
-# 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
-# --------------------------------
-# The lwIP and iperf tasks have a serial dependency (i.e., iperf must wait for lwIP to process packets),
-# meaning that running in multi-core mode does not significantly improve performance. Additionally,
-# IRAM optimizations have a more noticeable effect in single-core mode.
-# However, while a single-core configuration can enhance iperf performance in controlled or isolated
-# testing scenarios, it may not be optimal for real-world applications where the system also needs to
-# handle additional, non-network-related tasks. In such cases, multi-core configurations might be better
-# suited for balancing workloads and ensuring overall system responsiveness.
-
-# 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
-CONFIG_LWIP_EXTRA_IRAM_OPTIMIZATION=y
-
-# Enable Ethernet IRAM optimization
-CONFIG_ETH_IRAM_OPTIMIZATION=y
+# Common / performance options live in sdkconfig.defaults
 
 # Config Ethernet Init
 CONFIG_ETHERNET_SPI_SUPPORT=y
diff --git a/examples/ethernet/iperf/sdkconfig.ci.default_dp83848 b/examples/ethernet/iperf/sdkconfig.ci.default_dp83848
index 46f2df3e2bb..c14880c5339 100644
--- a/examples/ethernet/iperf/sdkconfig.ci.default_dp83848
+++ b/examples/ethernet/iperf/sdkconfig.ci.default_dp83848
@@ -1,40 +1,4 @@
-# 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
-# --------------------------------
-# The lwIP and iperf tasks have a serial dependency (i.e., iperf must wait for lwIP to process packets),
-# meaning that running in multi-core mode does not significantly improve performance. Additionally,
-# IRAM optimizations have a more noticeable effect in single-core mode.
-# However, while a single-core configuration can enhance iperf performance in controlled or isolated
-# testing scenarios, it may not be optimal for real-world applications where the system also needs to
-# handle additional, non-network-related tasks. In such cases, multi-core configurations might be better
-# suited for balancing workloads and ensuring overall system responsiveness.
-
-# 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
-CONFIG_LWIP_EXTRA_IRAM_OPTIMIZATION=y
-
-# Enable Ethernet IRAM optimization
-CONFIG_ETH_IRAM_OPTIMIZATION=y
+# Common / performance options live in sdkconfig.defaults
 
 CONFIG_ETH_ENABLED=y
 CONFIG_ETH_USE_ESP32_EMAC=y
diff --git a/examples/ethernet/iperf/sdkconfig.ci.default_ip101 b/examples/ethernet/iperf/sdkconfig.ci.default_ip101
index a26d45ecbeb..06d0d52c913 100644
--- a/examples/ethernet/iperf/sdkconfig.ci.default_ip101
+++ b/examples/ethernet/iperf/sdkconfig.ci.default_ip101
@@ -1,40 +1,4 @@
-# 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
-# --------------------------------
-# The lwIP and iperf tasks have a serial dependency (i.e., iperf must wait for lwIP to process packets),
-# meaning that running in multi-core mode does not significantly improve performance. Additionally,
-# IRAM optimizations have a more noticeable effect in single-core mode.
-# However, while a single-core configuration can enhance iperf performance in controlled or isolated
-# testing scenarios, it may not be optimal for real-world applications where the system also needs to
-# handle additional, non-network-related tasks. In such cases, multi-core configurations might be better
-# suited for balancing workloads and ensuring overall system responsiveness.
-
-# 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
-CONFIG_LWIP_EXTRA_IRAM_OPTIMIZATION=y
-
-# Enable Ethernet IRAM optimization
-CONFIG_ETH_IRAM_OPTIMIZATION=y
+# Common / performance options live in sdkconfig.defaults
 
 CONFIG_ETH_ENABLED=y
 CONFIG_ETH_USE_ESP32_EMAC=y
diff --git a/examples/ethernet/iperf/sdkconfig.ci.default_ip101_esp32p4 b/examples/ethernet/iperf/sdkconfig.ci.default_ip101_esp32p4
index e76b29ba1b7..960234d7f75 100644
--- a/examples/ethernet/iperf/sdkconfig.ci.default_ip101_esp32p4
+++ b/examples/ethernet/iperf/sdkconfig.ci.default_ip101_esp32p4
@@ -1,43 +1,7 @@
+# Common / performance options live in sdkconfig.defaults
+
 CONFIG_IDF_TARGET="esp32p4"
 
-# 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
-# --------------------------------
-# The lwIP and iperf tasks have a serial dependency (i.e., iperf must wait for lwIP to process packets),
-# meaning that running in multi-core mode does not significantly improve performance. Additionally,
-# IRAM optimizations have a more noticeable effect in single-core mode.
-# However, while a single-core configuration can enhance iperf performance in controlled or isolated
-# testing scenarios, it may not be optimal for real-world applications where the system also needs to
-# handle additional, non-network-related tasks. In such cases, multi-core configurations might be better
-# suited for balancing workloads and ensuring overall system responsiveness.
-
-# 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
-CONFIG_LWIP_EXTRA_IRAM_OPTIMIZATION=y
-
-# Enable Ethernet IRAM optimization
-CONFIG_ETH_IRAM_OPTIMIZATION=y
-
 CONFIG_ETH_ENABLED=y
 CONFIG_ETH_USE_ESP32_EMAC=y
 
diff --git a/examples/ethernet/iperf/sdkconfig.ci.default_ip101_esp32p4v1 b/examples/ethernet/iperf/sdkconfig.ci.default_ip101_esp32p4v1
index 67e8bf65932..d61ebeaea5a 100644
--- a/examples/ethernet/iperf/sdkconfig.ci.default_ip101_esp32p4v1
+++ b/examples/ethernet/iperf/sdkconfig.ci.default_ip101_esp32p4v1
@@ -1,44 +1,8 @@
+# Common / performance options live in sdkconfig.defaults
+
 CONFIG_IDF_TARGET="esp32p4"
 CONFIG_ESP32P4_SELECTS_REV_LESS_V3=y
 
-# 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
-# --------------------------------
-# The lwIP and iperf tasks have a serial dependency (i.e., iperf must wait for lwIP to process packets),
-# meaning that running in multi-core mode does not significantly improve performance. Additionally,
-# IRAM optimizations have a more noticeable effect in single-core mode.
-# However, while a single-core configuration can enhance iperf performance in controlled or isolated
-# testing scenarios, it may not be optimal for real-world applications where the system also needs to
-# handle additional, non-network-related tasks. In such cases, multi-core configurations might be better
-# suited for balancing workloads and ensuring overall system responsiveness.
-
-# 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
-CONFIG_LWIP_EXTRA_IRAM_OPTIMIZATION=y
-
-# Enable Ethernet IRAM optimization
-CONFIG_ETH_IRAM_OPTIMIZATION=y
-
 CONFIG_ETH_ENABLED=y
 CONFIG_ETH_USE_ESP32_EMAC=y
 
diff --git a/examples/ethernet/iperf/sdkconfig.ci.default_ksz8041 b/examples/ethernet/iperf/sdkconfig.ci.default_ksz8041
index 875e0adb123..92998452d49 100644
--- a/examples/ethernet/iperf/sdkconfig.ci.default_ksz8041
+++ b/examples/ethernet/iperf/sdkconfig.ci.default_ksz8041
@@ -1,40 +1,4 @@
-# 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
-# --------------------------------
-# The lwIP and iperf tasks have a serial dependency (i.e., iperf must wait for lwIP to process packets),
-# meaning that running in multi-core mode does not significantly improve performance. Additionally,
-# IRAM optimizations have a more noticeable effect in single-core mode.
-# However, while a single-core configuration can enhance iperf performance in controlled or isolated
-# testing scenarios, it may not be optimal for real-world applications where the system also needs to
-# handle additional, non-network-related tasks. In such cases, multi-core configurations might be better
-# suited for balancing workloads and ensuring overall system responsiveness.
-
-# 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
-CONFIG_LWIP_EXTRA_IRAM_OPTIMIZATION=y
-
-# Enable Ethernet IRAM optimization
-CONFIG_ETH_IRAM_OPTIMIZATION=y
+# Common / performance options live in sdkconfig.defaults
 
 CONFIG_ETH_ENABLED=y
 CONFIG_ETH_USE_ESP32_EMAC=y
diff --git a/examples/ethernet/iperf/sdkconfig.ci.default_ksz8851snl b/examples/ethernet/iperf/sdkconfig.ci.default_ksz8851snl
index 298561ddee3..ef0043d436d 100644
--- a/examples/ethernet/iperf/sdkconfig.ci.default_ksz8851snl
+++ b/examples/ethernet/iperf/sdkconfig.ci.default_ksz8851snl
@@ -1,40 +1,4 @@
-# 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
-# --------------------------------
-# The lwIP and iperf tasks have a serial dependency (i.e., iperf must wait for lwIP to process packets),
-# meaning that running in multi-core mode does not significantly improve performance. Additionally,
-# IRAM optimizations have a more noticeable effect in single-core mode.
-# However, while a single-core configuration can enhance iperf performance in controlled or isolated
-# testing scenarios, it may not be optimal for real-world applications where the system also needs to
-# handle additional, non-network-related tasks. In such cases, multi-core configurations might be better
-# suited for balancing workloads and ensuring overall system responsiveness.
-
-# 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
-CONFIG_LWIP_EXTRA_IRAM_OPTIMIZATION=y
-
-# Enable Ethernet IRAM optimization
-CONFIG_ETH_IRAM_OPTIMIZATION=y
+# Common / performance options live in sdkconfig.defaults
 
 # Config Ethernet Init
 CONFIG_ETHERNET_SPI_SUPPORT=y
diff --git a/examples/ethernet/iperf/sdkconfig.ci.default_lan8720 b/examples/ethernet/iperf/sdkconfig.ci.default_lan8720
index 123348d1a45..78c50026824 100644
--- a/examples/ethernet/iperf/sdkconfig.ci.default_lan8720
+++ b/examples/ethernet/iperf/sdkconfig.ci.default_lan8720
@@ -1,40 +1,4 @@
-# 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
-# --------------------------------
-# The lwIP and iperf tasks have a serial dependency (i.e., iperf must wait for lwIP to process packets),
-# meaning that running in multi-core mode does not significantly improve performance. Additionally,
-# IRAM optimizations have a more noticeable effect in single-core mode.
-# However, while a single-core configuration can enhance iperf performance in controlled or isolated
-# testing scenarios, it may not be optimal for real-world applications where the system also needs to
-# handle additional, non-network-related tasks. In such cases, multi-core configurations might be better
-# suited for balancing workloads and ensuring overall system responsiveness.
-
-# 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
-CONFIG_LWIP_EXTRA_IRAM_OPTIMIZATION=y
-
-# Enable Ethernet IRAM optimization
-CONFIG_ETH_IRAM_OPTIMIZATION=y
+# Common / performance options live in sdkconfig.defaults
 
 CONFIG_ETH_ENABLED=y
 CONFIG_ETH_USE_ESP32_EMAC=y
diff --git a/examples/ethernet/iperf/sdkconfig.ci.default_rtl8201 b/examples/ethernet/iperf/sdkconfig.ci.default_rtl8201
index ff69e18ceb7..086fe058ee4 100644
--- a/examples/ethernet/iperf/sdkconfig.ci.default_rtl8201
+++ b/examples/ethernet/iperf/sdkconfig.ci.default_rtl8201
@@ -1,40 +1,4 @@
-# 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
-# --------------------------------
-# The lwIP and iperf tasks have a serial dependency (i.e., iperf must wait for lwIP to process packets),
-# meaning that running in multi-core mode does not significantly improve performance. Additionally,
-# IRAM optimizations have a more noticeable effect in single-core mode.
-# However, while a single-core configuration can enhance iperf performance in controlled or isolated
-# testing scenarios, it may not be optimal for real-world applications where the system also needs to
-# handle additional, non-network-related tasks. In such cases, multi-core configurations might be better
-# suited for balancing workloads and ensuring overall system responsiveness.
-
-# 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
-CONFIG_LWIP_EXTRA_IRAM_OPTIMIZATION=y
-
-# Enable Ethernet IRAM optimization
-CONFIG_ETH_IRAM_OPTIMIZATION=y
+# Common / performance options live in sdkconfig.defaults
 
 # Config Ethernet Init
 CONFIG_ETHERNET_PHY_RTL8201=y
diff --git a/examples/ethernet/iperf/sdkconfig.ci.default_w5500 b/examples/ethernet/iperf/sdkconfig.ci.default_w5500
index 860f115a74d..462ecccacff 100644
--- a/examples/ethernet/iperf/sdkconfig.ci.default_w5500
+++ b/examples/ethernet/iperf/sdkconfig.ci.default_w5500
@@ -1,40 +1,4 @@
-# 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
-# --------------------------------
-# The lwIP and iperf tasks have a serial dependency (i.e., iperf must wait for lwIP to process packets),
-# meaning that running in multi-core mode does not significantly improve performance. Additionally,
-# IRAM optimizations have a more noticeable effect in single-core mode.
-# However, while a single-core configuration can enhance iperf performance in controlled or isolated
-# testing scenarios, it may not be optimal for real-world applications where the system also needs to
-# handle additional, non-network-related tasks. In such cases, multi-core configurations might be better
-# suited for balancing workloads and ensuring overall system responsiveness.
-
-# 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
-CONFIG_LWIP_EXTRA_IRAM_OPTIMIZATION=y
-
-# Enable Ethernet IRAM optimization
-CONFIG_ETH_IRAM_OPTIMIZATION=y
+# Common / performance options live in sdkconfig.defaults
 
 # Config Ethernet Init
 CONFIG_ETHERNET_SPI_SUPPORT=y
diff --git a/examples/ethernet/iperf/sdkconfig.ci.default_yt8531_esp32s31 b/examples/ethernet/iperf/sdkconfig.ci.default_yt8531_esp32s31
new file mode 100644
index 00000000000..c6de448a39d
--- /dev/null
+++ b/examples/ethernet/iperf/sdkconfig.ci.default_yt8531_esp32s31
@@ -0,0 +1,10 @@
+# Common / performance options live in sdkconfig.defaults
+
+CONFIG_IDF_TARGET="esp32s31"
+
+CONFIG_ETH_ENABLED=y
+CONFIG_ETH_USE_ESP32_EMAC=y
+
+# Config Ethernet Init
+CONFIG_ETHERNET_INTERNAL_SUPPORT=y
+CONFIG_ETHERNET_PHY_YT8531=y
diff --git a/examples/ethernet/iperf/sdkconfig.ci.worst_case_perf_w5500_c2 b/examples/ethernet/iperf/sdkconfig.ci.worst_case_perf_w5500_c2
index bf045ebcb3c..51042fb2137 100644
--- a/examples/ethernet/iperf/sdkconfig.ci.worst_case_perf_w5500_c2
+++ b/examples/ethernet/iperf/sdkconfig.ci.worst_case_perf_w5500_c2
@@ -12,28 +12,11 @@
 
 CONFIG_IDF_TARGET="esp32c2"
 
-# 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
-
-# Disable watch dog
-CONFIG_ESP_INT_WDT=n
-CONFIG_ESP_TASK_WDT_EN=n
-
-# Disable lwIP IRAM optimization
+# Disable lwIP IRAM optimization (overrides sdkconfig.defaults)
 CONFIG_LWIP_IRAM_OPTIMIZATION=n
 CONFIG_LWIP_EXTRA_IRAM_OPTIMIZATION=n
 
-# Disable Ethernet IRAM optimization
+# Disable Ethernet IRAM optimization (overrides sdkconfig.defaults)
 CONFIG_ETH_IRAM_OPTIMIZATION=n
 
 # Config Ethernet Init and Choose w5500
diff --git a/examples/network/.build-test-rules.yml b/examples/network/.build-test-rules.yml
index a98d7faebf4..a8e725182c8 100644
--- a/examples/network/.build-test-rules.yml
+++ b/examples/network/.build-test-rules.yml
@@ -2,9 +2,9 @@
 
 examples/network/bridge:
   disable:
-    - if: IDF_TARGET in ["esp32h21", "esp32h4", "esp32s31"]
+    - if: IDF_TARGET in ["esp32h21", "esp32h4"]
       temporary: true
-      reason: not supported yet # TODO: [ESP32H21] IDF-12203 [ESP32H4] IDF-12712 [ESP32S31] IDF-14929
+      reason: not supported yet # TODO: [ESP32H21] IDF-12203 [ESP32H4] IDF-12712
   disable_test:
     - if: IDF_TARGET != "esp32"
       reason: Generic functionality, no need to be run on specific targets
@@ -17,9 +17,6 @@ examples/network/bridge:
 examples/network/eth2ap:
   disable:
     - if: SOC_WIFI_SUPPORTED != 1
-    - if: IDF_TARGET in ["esp32s31"]
-      temporary: true
-      reason: not support yet # TODO: [ESP32S31] IDF-14929
   depends_components:
     - esp_eth
     - esp_wifi
@@ -27,10 +24,6 @@ examples/network/eth2ap:
 examples/network/simple_sniffer:
   disable:
     - if: SOC_WIFI_SUPPORTED != 1
-  disable_test:
-    - if: IDF_TARGET in ["esp32s31"]
-      temporary: true
-      reason: lack of runners
   depends_components:
     - esp_wifi
     - fatfs
@@ -39,9 +32,6 @@ examples/network/simple_sniffer:
 examples/network/sta2eth:
   disable:
     - if: SOC_WIFI_SUPPORTED != 1
-    - if: IDF_TARGET in ["esp32s31"]
-      temporary: true
-      reason: not support yet # TODO: [ESP32S31] IDF-14929
   depends_components:
     - esp_eth
     - esp_wifi
@@ -50,10 +40,6 @@ examples/network/sta2eth:
     - http-server
 
 examples/network/vlan_support:
-  disable:
-    - if: IDF_TARGET in ["esp32s31"]
-      temporary: true
-      reason: not support yet # TODO: [ESP32S31] IDF-14929
   disable_test:
     - if: IDF_TARGET not in ["esp32"]
       reason: Runner uses esp32 ethernet kit
diff --git a/examples/network/bridge/README.md b/examples/network/bridge/README.md
index 8243030de8b..bd3b2c73ffc 100644
--- a/examples/network/bridge/README.md
+++ b/examples/network/bridge/README.md
@@ -1,5 +1,5 @@
-| Supported Targets | ESP32 | ESP32-C2 | ESP32-C3 | ESP32-C5 | ESP32-C6 | ESP32-C61 | ESP32-H2 | ESP32-P4 | ESP32-S2 | ESP32-S3 |
-| ----------------- | ----- | -------- | -------- | -------- | -------- | --------- | -------- | -------- | -------- | -------- |
+| Supported Targets | ESP32 | ESP32-C2 | ESP32-C3 | ESP32-C5 | ESP32-C6 | ESP32-C61 | ESP32-H2 | ESP32-P4 | ESP32-S2 | ESP32-S3 | ESP32-S31 |
+| ----------------- | ----- | -------- | -------- | -------- | -------- | --------- | -------- | -------- | -------- | -------- | --------- |
 
 # Bridge Example
 (See the README.md file in the upper level 'examples' directory for more information about examples.)
diff --git a/examples/network/eth2ap/README.md b/examples/network/eth2ap/README.md
index a2e7c4e0b47..a184939bb0d 100644
--- a/examples/network/eth2ap/README.md
+++ b/examples/network/eth2ap/README.md
@@ -1,5 +1,5 @@
-| Supported Targets | ESP32 | ESP32-C2 | ESP32-C3 | ESP32-C5 | ESP32-C6 | ESP32-C61 | ESP32-S2 | ESP32-S3 |
-| ----------------- | ----- | -------- | -------- | -------- | -------- | --------- | -------- | -------- |
+| Supported Targets | ESP32 | ESP32-C2 | ESP32-C3 | ESP32-C5 | ESP32-C6 | ESP32-C61 | ESP32-S2 | ESP32-S3 | ESP32-S31 |
+| ----------------- | ----- | -------- | -------- | -------- | -------- | --------- | -------- | -------- | --------- |
 
 # eth2ap Example
 (See the README.md file in the upper level 'examples' directory for more information about examples. To try a more complex application about Ethernet to WiFi data forwarding, please go to [iot-solution](https://github.com/espressif/esp-iot-solution/tree/release/v1.0/examples/eth2wifi).)
diff --git a/examples/network/simple_sniffer/pytest_simple_sniffer.py b/examples/network/simple_sniffer/pytest_simple_sniffer.py
index 7971e6ab9c8..3a2367878c5 100644
--- a/examples/network/simple_sniffer/pytest_simple_sniffer.py
+++ b/examples/network/simple_sniffer/pytest_simple_sniffer.py
@@ -56,6 +56,7 @@ def _sniffer_packets_check(dut: Dut, channel: int, packet_num: int) -> None:
         'esp32c61',
         'esp32s2',
         'esp32s3',
+        'esp32s31',
     ],
     indirect=['target'],
 )
diff --git a/examples/network/sta2eth/README.md b/examples/network/sta2eth/README.md
index 96e3437aa41..42871e79349 100644
--- a/examples/network/sta2eth/README.md
+++ b/examples/network/sta2eth/README.md
@@ -1,5 +1,5 @@
-| Supported Targets | ESP32 | ESP32-C2 | ESP32-C3 | ESP32-C5 | ESP32-C6 | ESP32-C61 | ESP32-S2 | ESP32-S3 |
-| ----------------- | ----- | -------- | -------- | -------- | -------- | --------- | -------- | -------- |
+| Supported Targets | ESP32 | ESP32-C2 | ESP32-C3 | ESP32-C5 | ESP32-C6 | ESP32-C61 | ESP32-S2 | ESP32-S3 | ESP32-S31 |
+| ----------------- | ----- | -------- | -------- | -------- | -------- | --------- | -------- | -------- | --------- |
 
 # WiFi station to "Wired" interface L2 forwarder
 
diff --git a/examples/network/vlan_support/README.md b/examples/network/vlan_support/README.md
index 79a614298af..be488596b9e 100644
--- a/examples/network/vlan_support/README.md
+++ b/examples/network/vlan_support/README.md
@@ -1,5 +1,5 @@
-| Supported Targets | ESP32 | ESP32-C2 | ESP32-C3 | ESP32-C5 | ESP32-C6 | ESP32-C61 | ESP32-H2 | ESP32-H21 | ESP32-H4 | ESP32-P4 | ESP32-S2 | ESP32-S3 |
-| ----------------- | ----- | -------- | -------- | -------- | -------- | --------- | -------- | --------- | -------- | -------- | -------- | -------- |
+| Supported Targets | ESP32 | ESP32-C2 | ESP32-C3 | ESP32-C5 | ESP32-C6 | ESP32-C61 | ESP32-H2 | ESP32-H21 | ESP32-H4 | ESP32-P4 | ESP32-S2 | ESP32-S3 | ESP32-S31 |
+| ----------------- | ----- | -------- | -------- | -------- | -------- | --------- | -------- | --------- | -------- | -------- | -------- | -------- | --------- |
 
 # Ethernet VLAN Support Example
 
diff --git a/pytest.ini b/pytest.ini
index b50ebef0c0d..883561adfec 100644
--- a/pytest.ini
+++ b/pytest.ini
@@ -53,6 +53,7 @@ env_markers =
     eth_rtl8201: connected via RTL8201 ethernet transceiver
     eth_ksz8041: connected via KSZ8041 ethernet transceiver
     eth_dp83848: connected via DP83848 ethernet transceiver
+    eth_yt8531: connected via YT8531 ethernet transceiver
     eth_w5500: SPI Ethernet module with two W5500
     eth_ksz8851snl: SPI Ethernet module with two KSZ8851SNL
     eth_dm9051: SPI Ethernet module with two DM9051