Friday, 24 May 2019

bandwidth - Optimize Performance of Google WiFi and CenturyLink 1Gbps Fiber

I had Google Wifi and it really works well. A few months ago I switched to CenturyLink 1Gbps Fiber service and overall I have been very satisfied with that as well. I have seen other posts of serious bandwidth issues with this combination, and while I don't have serious issues, I feel like there is something limiting my performance.


When the technician installed the CenturyLink fiber, he tested it and I was getting around 900Mbps down and up. Pretty impressive.


I was never able to get the Google Wifi to work with the C2100T CenturyLink Router. It may very well be that I didn't have the correct settings - I am able to set the C2100T to transparent bridge mode but I'm not sure of the correct Broadband Settings and the Auto options don't work for me.


After reading some posts I ordered a TP-Link TL-SG105E and configured it for the VLAN tagging. The network has worked reliably with that setup although the bandwidth is not as good as directly out of the C2100T. With this setup I get between 500-600Mbps down and 200-300Mbps up over wired connection.


Since the TL-SG105E is a relatively inexpensive (~$30), I thought it might be limiting my bandwidth. I swapped the managed switch out for a Mikrotik RB750Gr3 setup in bridge mode. And I get the same speeds as with the TL-SG105E. That kind of points to the Google Wifi as the bottleneck.


Can anyone confirm that these are the limits with Google Wifi?
Alternatively, any suggestions on alternate configurations to try?


Here is what I tried today:




  • 900/900Mbps ONT->C2100T->Laptop (Laptop connected to LAN port in C2100T)




  • 530/220Mbps ONT->RB750Gr3->Google-Wifi->Laptop (Laptop connected to Google Wifi LAN port)




  • 520/220Mbps ONT->TL-SG105E->Google-Wifi->Laptop (Laptop connected to Google Wifi LAN port)




I played around with the C2100T in transparent bridge mode, but again I was unable to get that working.

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