Not strictly a Pi problem but I'm having difficulty getting my head round a network situation.
Pi is downstairs in the parlour acting as a PVR, media centre, always-on bittorrent client and network file server. It's connected to the modem/router via an ethernet cable and accessed via SSH and VNC. So far, so good.
However, when we have visitors, my wife insists that I take it upstairs to my study because "all the wires look a mess". She has a point.
Upstairs I have a dual boot (Windows 8/Linux Mint 13) PC with 2 ethernet ports. One port is connected via wired ethernet to the downstairs modem/router and I want to connect the Pi to the other during its periods of banishment. Wi-Fi doesn't reach here.
So...
How do I get the Pi to recognise where it is so that it can adapt to its situation? I don't want to have "upstairs" and "downstairs" SD cards, nor do I want DHCP servers on the upstairs machine (not least because I don't know how to do it). Obviously I don't expect it to carry out all its functions upstairs but it would be nice to experiment with it (particularly when we have visitors).
Ideally I would like both Windows and Linux to be available.
Another Dave