What I did: I needed Wifi access at both ends of our flat, but there was thick walls at the inside of the L shaped layout that stopped it from getting through. For this to work, you’ll pick a ‘master’ router and a ‘slave’ – the master handling the connection to the internet and the overall network, the slave merely creates another wireless network and bridges it to the master network. What that means: I set up our main router (I’d pick the better router i.e the Cisco N) as normal, then ran an ethernet cable under the carpet up to the other end of the flat from one of the ethernet ports, into a port on the ‘slave’ router. Before plugging in the ethernet to the slave, I plugged a computer into the slave router and used this to configure it (via its web based interface, typically at the address 192.168.1.1). I then set it to have a static IP address (I knew the other router was 192.168.1.1) of 192.168.1.2, so I could always tell them apart and remember the addresses for configuring them. In terms of the configuration of the slave, I merely had to disable its DHCP server, and set up the wifi as preferred (SSID, password etc). As far as I remember, that was all it took to have a second wifi network existing on essentially the same internet and network connection.