It is that simple. No need for the xbox wireless adapter or running cables. No impacts on MTU (1500 for cable or 1462 for DSL). Can't play xbox on line (can't logon to XBox Live) without UPnP enabled. Well, you might be able to connect to Xbox Live, but NAT would be restricted, so you would have problems inviting friends and joining games. Enable UPnP.
Assuming the wrt connects to the 655 and the wrt gets the internet, proceed as follows. Getting the wrt to connect to the net through the 655 is up to you.
1 - wrt: set UPnP to on and set MTU to 1500 (1462 if DSL) - save, reboot, verify settings took
2 - 655: set UPnP to on and set MTU to 1500 (1462 if DSL) - save, reboot, verify settings took
3 - Connect XBox to wrt LAN port (not WAN) with network cable.
4 - Xbox network settings - my xbox - system - network - auto get address. Test xbox network. If it does not connect to Xbox Live, you missed something. WRT assigns the dynamic IP - no static needed. It does not matter if the wrt is repeater (different subnet) or client (same subnet).
4 - play Xbox - go wild
5 - you can connect up to 3 other devices to the wrt LANs in addition to the xbox.
6 - If you want to use Tveristy on the XBox, the wrt has to be a client on the same subnet as the Tversity server.
I got tired of fighting my teenagers over using Xbox, so I bought my own - drives Mom nutz
