I have a normal home WiFi network with some 10-15 devices connected. I have one regular use 2Mbps ADSL internet source and one high-speed 50Mbps cable line. I don't need to use both simultaneously, as one is unlimited and the other is limited. I simply need to pick one of the two and continue working.
Currently, I physically go to the router, plug out the LAN cable from one modem and put it into another. It's actually easy and it doesn't need any more config, so I haven't bothered to change this. But it would be nice to be able to pick between two via a web UI or something simpler.
I'm picturing a solution similar to a KVM switch but for LAN cables. There are dual-WAN (or multi-WAN) routers, but most of them seem to be built for automatic load balancing, so those are out.
I don't want to set up a proxy, because that will require too much config.
I don't want two separate WiFi routers because, like I said, I have several devices connected to to the network, which would be inaccessible from the other network. The devices are a healthy mix of Windows, Mac, Android, RPi and other devices including a smart TV and an Xbox 360.
What kind of a solution can you suggest?