Home Network Help

[jellybeard999]

I wonder if anyone can help me

I have a wireless router / modem downstairs which is the net connection. Two PCs upstairs connect to this wirelessly. I want to link the two PCs upstairs to each other via ethernet, but still connect to the net from downstairs.

Both have wifi
One is a fileserver one my main pc.

I have a switch available for use upstairs which is my next plan, but how do i force it to share between the two pcs via ethernet rather than wifi ?

To further compound, i want the share to be available to other pcs wirelessly.

I tried a bridged connection via crossover cable, but it went to pot when i turned the main pc off (fileserver was left on and had the wifi connection) .

Hopefully it all makes sense

 

[pc-modd]

I did something similar like this with my file server, but I had second wireless router that i used to cable the two pc's together and then used ICS on my file server to share internet and the second network wirelessly (i used a wireless router and not a switch)... If that makes sense