I have an Nvidia based chipset on my motherboard.

My motherboard has dual gigabit lan connections.

I have an option to "Team" my network adapters.

Teaming usually means that 1 connection will process outgoing info and the other incoming, but will both be seen as 1 connection.

When teaming is enabled FFXIV crashes, randomly and frequently, with disconnect errors.

If I disable the teaming, the errors stop.

Hopefully this helps someone.