I want do end or stop the ETH/ethernet component to conserve energy:

In ETH.H/CPP there is a begin method but no corressponding endmethod.
In the underlying Espressif esp-idf there is a esp_eth_start and a corresponding esp_eth_stop.

I'm using WT32_ETH01 and/or Olimex ESP32 POE mostly both are using the LAN 8720 PHY
Some have power pin some have not.

I observe that power raises from 60-80mA to 150mA when starting ETH (ethernet), but there is no way back.

Workaround so far is the set some static (flash/eeprom) markers and then reboot (not activating Ethernet).
But this disturbes the other working tasks...