Well, I shoved a 10/100 Netgear NIC into my PC and ran a wire from there to the DMA2200 (with appropriate cross-wiring). I set both the NIC and the DMA2200 to static IP and the DMA2200 won't see the PC.
Do I have to disconnect/reconnect the DMA2200 since the MAC and IP address changed?
Just to test the cable and the adapter, I created a network bridge between the two NICs on the PC and reverted to automatic IP. The DMA2200 logged on with no trouble. I tried watching a few things and it all works, but in my mind the bridge seems to defeat the purpose of having the second NIC.
I see 13% network usage watching live TV and recorded TV located on the PC. I see 27% usage when I play recorded TV located on the server, with or without the bridge.