I am using Linksys router WRT54GL. My router is connected with modem and everything works fine - I can connect computers with UTP cables via router / modem. I can also have wi-fi from linksys router. All OK.
I only have one problem. House is wired with UTP cables, so I simply plug in the cable in the upper floor in the switch in the wall and I have internet. And here's the problem - If I connect internet through modem, all is fine (so, plug in cable from modem to the switch in the wall). If I do the same thing from the router - I don't have an internet connection.
I connect router through PPPoe with user name / password.
What is the difference between router and modem connection?
To be more clear: If I connect computer directly to the router with cables, it works. Only if I do this by first connecting router with the network already installed in the house, then it doesn't work - computers in upper floors don't have internet connection. Doing same thing with modem - all OK.