Malfunction Ethernet switch

Very once in a while, I find my home internet connection not available even though the DSL model obviously working fine.  I knew it because I used WiFi to access the router connected next to the modem, and it always worked properly.  This morning I think I found out what the problem is.  It's the ancient Ethernet switch  that I used to connect between the router downstairs and the network upstairs causing the problem.  When the network hiccup happens, all I need to do is restart that router, and the problem will be solved.  So the bottom line is that I need to start shopping for a replacement network switch.