Question Bridged Modem & R7000 router slow wired internet speed

Aug 15, 2019
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Hey everyone, I have a super confusing issue with my network setup at home and I could really use some help/guidance! I'll try to explain it as well as I can:

I have a R7000 that I use as a router with a bridged modem/router Arris TG2492 given to me by my ISP. I am meant to have 200mbps of download speed and 10mbps of upload speed, and that is what I get when connected to my 5Ghz wifi network with my personal laptop, or connected through wire anywhere.

The issue is, I have a gigabit switch (TL SG105) which connects both my desktop, and an access point I setup (EX6130, which I know does not have a gigabit port). Now, despite getting the 200mbps when I connect my laptop to my switch, my desktop only gets 40 to 50 mbps when my R7000 is setup as a router and my TG2492 is in bridge mode. I get barely nothing in upload speed too.



I tried setting up the TG2492 as a router/modem and use the R7000 as a hub, and I get speeds over 100mbps when using speedtest on my desktop, but then within seconds the dl speed crashes down to 50, 60. It's also very unstable, I can tell I get really poor dl speed with it compared to what I'm used to getting when my R7000 is setup as a modem and I'm using my laptop.

It's very strange, because I just changed all my cabling and everything except my Access Point should be gigabit capable. I'm thinking it might be an issue with the way I setup the router/bridged modem configuration, but I have factory reset both several times now and I consistently get the same results... I also have the latest firmware for both.

Here's a diagram of my network for clarity:


I would greatly greatly greatly appreciate any help, I'm extremely confused and don't know how to diagnose the issue anymore!
 
Aug 15, 2019
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Are any of those lines between devices in-wall cabling (my guess is yes) ? What is the performance of the PC if connected directly to the wired port on the R7000 ?
Hey, thanks for your answer!

Yes, the cable between the r7000 and the sg105 is inside a wall.

The pc performs similarly when I skip the sg105 and just plug the ethernet cable into the computer (ie, I get 40mbps dl and 1mbps ul). When I plug my laptop, I get the full 200mbps.

I'm formatting my desktop right now since I'm running out of ideas, I'll let you guys know how it goes!
 
Aug 15, 2019
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If you get 40Mbit directly plugged into the R7000, then I would recommend a factory reset of the R7000. Set just the admin password, ISP required info, SSIDs and WIFI passwords. Disable UPNP and WPS -- IMO. Then retest.
After formatting, the issue seems to be fixed! Not quite sure what happened... I just hope it stays fixed!

Thanks for your help!
 

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