999999 is WAY too high. now you'd be getting fragmentation.
The MTU is such a factor because, by default, Windows 2000 and Windows XP set the MTU size to 1,500. It's been my experience that if a network is running slowly, even the 1,492 value I mentioned earlier is too high. I usually have the best luck by setting the MTU to around 1,454.
http://asia.cnet.com/itmanager/netadmin/0,...39089320,00.htm
This is what my win2k server setup looks like with equivalent to t1 and t2
http://members.shaw.ca/telfaq/TCP.jpg
choose save as and open in paint or whatever
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