Hi Emfiend,
Welcome to the forum.
Did you already try the methods in the tutorial from the post
#2 above? They will help determine what may be the problem.
Shawn
Thanks. I happened to find this forum after googling all the possible combinations of terms related to "vista" "lan" and "slow."
As per your suggestion, Yes. All that and then some. Turned off auto tuning, turned off rdc, turned off rss, disabled ipv6, and installed all hotfixes/hardware firmware, purged the dns, etc. I'm still holding out hope that there's something I did wrong and that this is easily fixable. The idea that an incompatible router is causing the problem seems plausible since the dgl-4300 was available a little before vista was released.
Things I haven't tried yet:
1. putting in a new nic on the xp computer (still waiting to get it in the mail)
2. hard-setting to 100/half duplex on everything (just learned about this today from another forum and will try after work)
3. connecting the two computers together w/o using a router (don't really know how to do this and have been looking for info online)
4. extensive network benchmarking with iperf (this is something I'll also need to learn how to do)
As you can see, at this point I'd be happy just to know what the source of the problem is but my lack of knowledge in networking is a bit of an obstacle.