Our team had a problem connecting to FMS during Bayou. We troubleshooted, and we found out that whenever we tethered the robot, the subnet mask would always reset to 255.0.0.0. I had to manually go the tcp/ip settings before every match and change the subnet back to 255.255.255.0. This fixed everything.
We also had the all-too-common loose ethernet port problem.
During
this match at the 1:14 mark you can see 3389 ramming into the alliance station wall causing the ethernet cord to fall out. I plugged it back in fast enough for it to reconnect.