Here is the description I got this evening from my friend. They have Ethernet cable to each room of their house, home-runned to a switch in the basement(16 port). They have Comcast Business 150meg service. He works from home with three devices in his office. It sounds like they have a combo modem/router from Comcast. There are two older Apple wireless AP's connected to the switch also. He gets 180meg speeds when his three office lines are connected directly into the router/modem(it has 4 ports). However, if you connect the switch to the router, service slows to a crawl. If his office lines go through the switch, it is super slow again. Only when his lines are directly connected to the router AND the switch is NOT connected to the router does he get full speed service. They have changed the router/modem and tried 3 different switches. Same results. I told him to connect it as he has it now(office lines into router, no switch) and run speedtest. Then connect switch, run speedtest. Then I told him to start with one AP and disconnect it from the switch, run speedtest. Then connect the other AP and repeat. If no change, start disconnecting one at a time and repeating speedtest. Any other ideas as to what could be going on?
Thanks!
Thanks!