Double routing only applies if you have double NAT (eg using two routers with DHCP/WAN ports). Am I thinking of the wrong product: http://www.tp-link.com/res/down/doc/Archer_D7(UN_V1_QIG_.pdf?...

You can use a downstream router as an access point and have the upstream router as the DHCP server. You just do not want both enabled.

Then, once the printer is setup on its own, you can add printer to your device. The Samsung Printer Diagnostics is also a pretty useful tool for troubleshooting.

I am not familiar with Sky IP, but maybe I can try and help. Are you using a separate modem or gateway and router? Or, are you just using the Archer D7? It makes a difference if you have to setup...

Is there any appreciable function loss associated with the error? Which band are you using? How is the signal strength? Is there a lot of traffic? Are you using a fix or auto channel?

I have Samsung Xpress C460W connected to Archer C9 without any issues out of the box. I have UPnP and WPS disabled on all routers. It is a lot easier to setup the Samsung printer to connect to...