When ever I boot a system to add it to Fuel I get a TFTP timeout. It successfully talks to the Fuel node, starts the TFTP negotiation, but then this happens.

PXE-E32: TFTP open timeout

We have a multi server deployment environment with Fuel, MAAS, and a internal Chef type system. Rebooting the MAAS server does clear the issue, but it reappears again 12-24 hours later. We also tried restarting the TFTP service on the Fuel node at first, but that stopped being effective quickly.