Using the R6040 packet driver from vogonsdrivers, using MTCP DHCP 2025-01-10, timeout is reached instantly no matter what is set for -timeout. The error says the ethernet card is receiving packets but the DHCP server never responded.
Using default values (simply running DHCP.exe), each attempt lasts less than 1 second even though the default timeout is 10 seconds. I've made sure that the system clock isn't running too fast.