Having a little problem here. I've got a configuration of a Modem (A) that's connected (by the WAN-port) to another router (B) and this one connectects to a another router (C) (LAN to WAN). It actually all works, used to work better though.
Since I've resetted the configuration of the router C, both routers allow only very slow internet use. Before that it was all fine.
I'm not 100% sure whether I set up router C correct again, but it's weird anyway that router B is now slow too. Only connecting to the modem itself gives me the full internet speed. There's no QoS enabled anywhere though. Anyone got suggestions what I could do here ? I'm pretty baffed about it.