Actually, I've found that the 30/5 test was a fluke. I think we're supposed to get and are getting 20/5. That sounds better anyway, and is a more common speed among ISPs around here.

I think on most attached computers I'm getting 18-19Mbps.

Unfortunately I don't have anything long enough to run it from switch 1-2. I suppose it's possible that the long run is damaged in some way, but this would seem unlikely. It's housed in a brand new underground conduit running from the new building construction to the old building, and there hasn't been construction going for months, so I can't see how anyone would have cut it or anything.

Is there a way to see if I'm at half or full duplex? I'm not sure how to tell. Isn't it on automatic by default? I suppose I could force it to full and see if it works or not.