esp_eth_set_mac does nothing. Can't change ESP's MAC Address

[GeorgeFlorian]

Hardware:

Board: ESP32 EVB
IDE name: PlatformIO Core, version 5.2.3
PSRAM enabled: no
Computer OS: Windows 10

Description:

Hello.
I have an ESP32-EVB with the following MACs:
WiFi Mac: 7c-9e-bd-30-2d-a8
ETH Mac: 7c-9e-bd-30-2d-ab

I'm trying to set the MAC of the ETH interface the same as the WiFi interface using the following code:

    ETH.begin();

    uint8_t mac[] = {};
    esp_wifi_get_mac(WIFI_IF_STA, &mac[0]);
    esp_eth_set_mac(&mac[0]);
    Serial.print("ETH MAC: ");
    Serial.println(ETH.macAddress());

This prints the right MAC, which is the same as the WiFi's MAC (7c-9e-bd-30-2d-a8), but using arp -a in cmd or looking in the router's device list gives me the original ETH MAC: 7c-9e-bd-30-2d-ab

How do I properly change the ETH MAC Address ?

[GeorgeFlorian]

Sooo ? Should it work or not ?

[smuellener]

@GeorgeFlorian Have you found a solution for this? Thank you

[smuellener]

Possible fix: #6458

[VojtechBartoska]

Thanks for linking this @smuellener. Closing this one as duplicate and @GeorgeFlorian please follow mentioned issue above as there is more extensive description and also PR. If it will be needed, you can reopen this issue.