Router TP Link Archer C80 switching between 100mbps and 1gbps

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Router TP Link Archer C80 switching between 100mbps and 1gbps

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Router TP Link Archer C80 switching between 100mbps and 1gbps
Router TP Link Archer C80 switching between 100mbps and 1gbps
2021-06-09 20:34:11 - last edited 2021-07-19 06:58:23
Model: Archer C80  
Hardware Version: V1
Firmware Version: 1.5.7 Build 210308 Rel.60033n(5553)

I have this problem which is driving me crazy, my internet speeds are switching on my brand new TP Link Archer C80:

At first the tests are limited to 100mbps but when I switch between the ports something weird happens:
Speedtest #1 LAN port 1: 91mbps down/76mbps up
Speedtest #2 LAN port 2: 247mbps down/165mbps up
Speedtest #3 LAN port 1: 254mbps down/171mbps up

And then it seems like the speed goes back up to its normal but only for some hours, then it goes back to being limited to 100mbps

My equipments:

OTN: Huawei Echolife EG8145V5
Router: TP-Link Archer C80 (Internet Port Negotiation Speed Setting = Auto Negotiation)
Cables: Furukawa CAT6 e Furukawa cat5e
Computer 1 (Desktop):
Ethernet adapter: Realtek® 8111F-VL GbE LAN chip (10/100/1000 Mbit) (Motherboard Gigabyte B85M-D3PH)
Mode speed&duplex set on Windows 10: Auto Negotiation
Operating System: Windows 10 64bit

The exact same behavior occurs on my other machine (Dell Latitude E7440):
Ethernet adapter: Intel Corporation Ethernet Connection I218-LM (rev 04)
Mode speed&duplex set on Windows 10: Auto Negotiation
Operating System: Debian Buster 64bit/Windows 10 64bit

I don't know what to do anymore, should I return the router?
 

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1 Accepted Solution
Re:Router TP Link Archer C80 switching between 100mbps and 1gbps-Solution
2021-06-09 22:25:15 - last edited 2021-07-19 06:58:23

@jmribeiro 

 

What you can do is to observe the device ports negotioated speed:

 

 

Check if these are correct according to you devices HW capabilities.

If the problem is with the Internet port only then you can set it like this or use another LAN port on the Huawei router:

 

 

Then observe the ethernet status again.

If the problem is with the LAN ports then change,observe ethernet status and test with another quality Cat 5E/6 cables.

The other thing you could do is to configure C80 in AP mode to avoid the double NAT in your network.

If that persists then go ahead and replace the device.

If this was helpful click once on the arrow pointing upward. If this solves your issue, click once the star to mark it as a "Recommended Solution".
Recommended Solution
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#2
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1 Reply
Re:Router TP Link Archer C80 switching between 100mbps and 1gbps-Solution
2021-06-09 22:25:15 - last edited 2021-07-19 06:58:23

@jmribeiro 

 

What you can do is to observe the device ports negotioated speed:

 

 

Check if these are correct according to you devices HW capabilities.

If the problem is with the Internet port only then you can set it like this or use another LAN port on the Huawei router:

 

 

Then observe the ethernet status again.

If the problem is with the LAN ports then change,observe ethernet status and test with another quality Cat 5E/6 cables.

The other thing you could do is to configure C80 in AP mode to avoid the double NAT in your network.

If that persists then go ahead and replace the device.

If this was helpful click once on the arrow pointing upward. If this solves your issue, click once the star to mark it as a "Recommended Solution".
Recommended Solution
  3  
  3  
#2
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