In a home LAN, I have connected one router A (which is also connected to the Internet) to router B but router B is supposed to work only as a switch (I am not using the WAN port in router B at all). Right now there are 2 computers connected directly through Ethernet to router A (and 2 other using WiFi) and 1 computer connected to router (switch) B.
After that I have noticed that on the other machines the Internet stops working for a short periods of time.
What can cause these problems? Should I setup static IP addresses for all of the computers in the network?