So this morning my 211k was giving me the same problem again. It is still on port #1 so i'm guessing its a switch problem. I'm going to swap the switch out and see if that resolves the problem.
Replaced the original switch with a new one. Everything has been working fine now for a few days (knock on wood). So it seems it was an issue with the DPP33.
Replaced the original switch with a new one. Everything has been working fine now for a few days (knock on wood). So it seems it was an issue with the DPP33.