Home network, a lot of Android, Windows, Linux devices. Outside connection is a Touchstone TG2492LG, also on the net an Epson L4160 network printer (all WiFi). Internet connection works fine, but connection between devices (e.g. to the printer) is intermittent at best. Works fine a while, then they are completely gone (printer can be managed by HTTP, get "no route to host", no ping/ssh to other Linuxes on the internal net, Internet works fine all the time).
There are no configuration changes in between, everything is up to date. Search turns out empty/irrelevant (lots on lost Internet connectivity, nothing on internal network working intermittently).
Edit: Further details: WiFi router (AP) is using 2.4GHz, no channel collisions with nearby networks (set to auto, anyway). I have Linux boxes 192.168.0.3, 192.168.0.23, printer 192.168.0.6, all WiFi, same network (there is only one). Intermittent (at best) ping between Linuxes or to printer, Internet connection from Linuxes works fine throughout (would need to connect to the printer --via WiFi-- to check if it has Internet connectivity). Internal connections work fine sometimes (could ssh to a Linux from my phone yesterday), most of the time they don't work at all.
