This is the working one (MxCube.Version=6.12.1), opening it with 6.13 cubeMX will migrated it and then break LWIP. in lwip.c I add this to trace DHCP success: /* USER CODE BEGIN 2 */ // DHCP callback function, returns 1 when there's an address int8_t...

No obvious diff... blaming stmcubeMX update was a my finding after days of regression investigations. We settled 'downgrade to 6.12' as an acceptable solution.Just signaling the issue to help others who might wondering what's suddenly is going wrong....