Mar 4th 2011, 16:53:56
There are a few options. What is likely happening is both routers are trying to run DHCP and it's conflicting back and forth. The two routers may also be trying to use the same IP address as well.
If you want to use the second router as a switch you can disable DHCP and then make the second router a different IP address on the same network as your primary router.
Another option is to plug your wire coming from the first router in to the WAN port on your second router. This will seperate your tivo and xbox on a different network, so that will likely cause a problem with media sharing if you have that setup on computers elsewhere.
Third option is the switch. Replacing the second router with a switch will get it all working without any configuring or anything, just plug and play :)