Loss of speed when connecting a router to a switch connected to another router

sergiol17

Reputable
May 24, 2014
1
0
4,510
Hi,
I have a home network set up where the cable mode/router provided by Comcast (Arris TG862G) is connected to a Dell 2716 switch, which is then wired to every room in the house. The Comcast router is in the basement and I want to set up wifi in the second floor in my house. My internet connection is supposed to be 100 mbps.

In order to get wifi in the second floor, I am connecting a wireless router (Linksys E2500) to one of the ethernet outlets in the second floor that is wired to the switch. I am able to connect to the internet, but the speed I get from the E2500 router is significantly slower than what my speed should be. When I do a wired connection to it and run a speed test, I only get around 20 mbps. If I unplug the router and plug the computer directly to the ethernet outlet, I get the full 100 mbps. So far I have tried the following connections:

Computer to Arris TCG862G cable modem/router - I get 100 mbps+
Wifi to Arris TCG862G - I get around 80-90 mbps
Computer to Linksys E2500 to Arris TCG862G - I get around 100 mbps
Wifi to Linksys E2500 to Arris TCG862G - I get around 70-80 mbps
Computer to switch to Arris TCG826G - I get 100 mbps+
Computer to Linksys E2500 to switch to Arris TCG826G - I get around 20 mbps
Wifi to Linksys E2500 to switch to Arris TCG826G - I get around 9-10 mbps

I have tried setting up the Linksys router both as a bridge and with DHCP enabled but the results don't change. Does anybody have an idea of what could be wrong or how to troubleshoot the issue? I don't really know where to go from here. Thanks!
 
Solution
When you connet the E2500 are you using its WAN or LAN port? You should turn off DHCP on the E2500 and connect one of its LAN ports to the switch. Its WAN port should not be in use.