Are you using unicast, broadcast, or multicast as the send method in the trio.xml?

I have recently become suspicious of packets larger than the ethernet MTU not being sent as expected on broadcast sockets. I don't have a conclusive theory yet, though. I thought large UDP messages got fragmented into as many IP packets as necessary, but this may not always be the case. What I've been seeing is the receiver not getting a packet, and not sending a retry either.

-dB