Can't Connect To Xbox Live

The problem with your set up is that you have two devices within your network (Linksys SPA2102, Netgear WNR2000) that performs NAT (Network Address Translation). Multiple layers, or double NAT environment is not a set up that support
UDP (User Datagram Protocol) over
NAT traversal.

So, what you have to do is either configure your Linksys to be operating in bridge mode, or change the order, for your Netgear to be the perimeter router of the route. This means that your Linksys terminates to the Netgear, by connecting from the Linksys
'Internet' (WAN) port, to a LAN port on the Netgear, and the Netgear then terminates to a modem, or wall socket (network).

All devices on your network that needs to communicate to the Internet-at-large, have to be connected to your perimeter router (Netgear).

Consult the manual for the Linksys 2102, how to configure in bridge/switch mode.

I would also suggest that you search google, how to bridge the Linksys.

 

I was examining my set up and found that they are both connected to a splitter. Does this make difference?

 

Where does the Ethernet cable, that goes from the WAN port of the Netgear router, connects to?

 

I bought a Ethernet cable so, all is good.

 

Will I be able to use my Ethernet cable for the Xbox One?

 

Yes! They use the same type of cable.