My client is not getting good reception in her second floor and wants to use a second router as a range extender. I am fairly new at networking and have never done this before. Would I have to run a cable all the way from the first floor primary router to the second floor router? even then would it just work or would I need to play with configuration settings? how would I even access the config for the second router? (normally its just the LAN IP address in a browser. any tips would be much appreciated