Not to discredit Chris on his way of doing this but for the GUI users, go to the Diagnostics menu --> Packet Capture --> Change the interface the one you are having issues with, change the number of packets to 1000, and change the level to full. Start the capture, and when finshed, download the pcap file and open it with Wireshark or then send it to Chris. This method is easier for me (fat fingers) :).
Verify your packet output with the DHCP RFC http://www.networksorcery.com/enp/rfc/rfc2131.txt Curtis
