I have two identical Siemens SE567 routers, from Telus, and I usually had one hooked up to my computer and my PS3 directly, using two Ethernet cables. Today, I moved my computer upstairs, and I decided to try and hook up both of the routers so that both my PS3 and PC have wired internet connectivity. I unhooked my computer from the original router, checked, and found that the internet still worked on the PlayStation.
So I went upstairs, hooked up all the stuff for the PC, and plugged the second router in to see if I could get it to work. It would not connect to the internet, and I tried configuring a new network, but I couldn't get it to function. However, once I turned off the first router, this one started up fine and the PC's Ethernet connection and wireless network (which I checked on my tablet) both work fine.
Therefore, it seems to me as though both routers cannot function both at the same time, at least the way they are set up, because they interfere with each other. So I'm wondering, is there a way to set both routers up, using my PC, so that I can have my PS3 connected with an Ethernet cable downstairs and my computer connected with an Ethernet cable upstairs, to two separate routers? Thanks for any stabs at this.