If it helps, I just tried my Mega2560 and ethernet shield on both a network with a dhcp server, and one without. The response was exactly as I expected on both. The dhcp issue was within a couple seconds. The fail took almost a minute.
If it helps, I just tried my Mega2560 and ethernet shield on both a network with a dhcp server, and one without. The response was exactly as I expected on both. The dhcp issue was within a couple seconds. The fail took almost a minute.