This has come up before and I've searched for everything I can find about it but still haven't found a working solution. I've been having issues similarly to what others have described trying to use a LAN8720 breakout with an ESP32 WROOM...the PHY seems to be working, it detects the ethernet cable being plugged in but I never get an IP address.

I (3483) emac: emac start success !!!
I (7483) eth_example: ~~~~~~~~~~~
I (7483) eth_example: ETHIP:0.0.0.0
I (7483) eth_example: ETHPMASK:0.0.0.0
I (7483) eth_example: ETHPGW:0.0.0.0
I (7483) eth_example: ~~~~~~~~~~~
I (7493) emac: eth link_up!!!
I (9483) eth_example: ~~~~~~~~~~~
I (9483) eth_example: ETHIP:0.0.0.0
I (9483) eth_example: ETHPMASK:0.0.0.0
I (9483) eth_example: ETHPGW:0.0.0.0
I (9483) eth_example: ~~~~~~~~~~~