Home Network Community > Wi-Fi Routers > What if my Router Speed is capped at 100 Mbps?
< Wi-Fi Routers

Troubleshooting What if my Router Speed is capped at 100 Mbps?

1131415

Troubleshooting What if my Router Speed is capped at 100 Mbps?

141 Reply
Re:What if my Router Speed is capped at 100 Mbps?
2025-06-05 12:50:47

@CraZyToEzDK 

 

CraZyToEzDK wrote

  @Kevin_Z 
I just can´t get the speed i pay for on this router..

I got Fiber 1000/1000 connection but when i connect to the TP router i lose 150-200Mbps.

 

How did you test the speed? Did you run a speed test on one of the three wired devices?

 

When conducting the speed test, please ensure there is no high-traffic usage on the network, including both wired and wireless devices.

 

Have you enabled the QoS feature for any devices or services? If so, please ensure it is correctly configured based on the bandwidth provided by your ISP.

 

If none of the above helps, please try resetting the AX73 to factory defaults and reconfiguring it from scratch, then connecting only one computer to its LAN port to test the real speed.

Nice to Meet You in Our TP-Link Community. Check Out the Latest Posts: Introducing AI QoS: Elevate Your Gaming Experience on the Archer GE800 Gaming Router! Connect TP-Link Archer BE550 to Germany's DS-Lite (Dual Stack Lite) Internet via WAN Archer GE550 - BE9300 Tri-Band Wi-Fi 7 Gaming Router Archer AX90 New Firmware Added Support for EasyMesh and Ethernet Backhaul If you found a post or response helpful, please click Helpful (arrow pointing upward icon). If you are the author of a topic, remember to mark a helpful reply as the "Recommended Solution" (star icon) so that others can benefit from it.
  0  
  0  
#139
Options
Re:[Troubleshooting] Speed limit to 100 Mbps
2025-06-05 12:57:48

 

DEBASISHMONDAL wrote

  @Kevin_Z Connected via CAT 6 and the Internet Option is Locked at 100mbps despite setting it to 1000mbps full duplex. When Connecting the Same through ISP to Laptop via the cable ignoring the router getting full speed. TP link customer Service is clueless they can't find any solution.

 

@DEBASISHMONDAL Please try my suggestions for VictorServellon, such as changing the Cat 6 cables, testing with other LAN ports on your ISP modem.

 

BTW, what is the specific model number of your ISP modem? How about the hardware and firmware version of the Archer C6?

 

Please also try resetting the C6 to factory defaults and reconfiguring it from scratch, then checking if the Internet port can be negotiated at a proper speed.

Nice to Meet You in Our TP-Link Community. Check Out the Latest Posts: Introducing AI QoS: Elevate Your Gaming Experience on the Archer GE800 Gaming Router! Connect TP-Link Archer BE550 to Germany's DS-Lite (Dual Stack Lite) Internet via WAN Archer GE550 - BE9300 Tri-Band Wi-Fi 7 Gaming Router Archer AX90 New Firmware Added Support for EasyMesh and Ethernet Backhaul If you found a post or response helpful, please click Helpful (arrow pointing upward icon). If you are the author of a topic, remember to mark a helpful reply as the "Recommended Solution" (star icon) so that others can benefit from it.
  0  
  0  
#140
Options
Re:[Troubleshooting] Speed limit to 100 Mbps
2025-06-05 13:44:42

  @Kevin_Z 1.0.16 Build 20230828 rel.44667

Already factory reset but nothing happened. Bought new Cat 6 cable which gave full speed when directly connected it to Laptop via ISP but speed capped at 100mbps when connected via Router WAN port

  0  
  0  
#141
Options
Re:[Troubleshooting] Speed limit to 100 Mbps
2025-06-06 10:06:17

 

DEBASISHMONDAL wrote

  @Kevin_Z 1.0.16 Build 20230828 rel.44667

Already factory reset but nothing happened. Bought new Cat 6 cable which gave full speed when directly connected it to Laptop via ISP but speed capped at 100mbps when connected via Router WAN port

 

@DEBASISHMONDAL 

 

If that is the case, we recommend reaching out to the local tech support, so they can work with you in looking into the issue further or help with the replacement:
https://www.tp-link.com/support/contact-technical-support/#Hotline-Support

Nice to Meet You in Our TP-Link Community. Check Out the Latest Posts: Introducing AI QoS: Elevate Your Gaming Experience on the Archer GE800 Gaming Router! Connect TP-Link Archer BE550 to Germany's DS-Lite (Dual Stack Lite) Internet via WAN Archer GE550 - BE9300 Tri-Band Wi-Fi 7 Gaming Router Archer AX90 New Firmware Added Support for EasyMesh and Ethernet Backhaul If you found a post or response helpful, please click Helpful (arrow pointing upward icon). If you are the author of a topic, remember to mark a helpful reply as the "Recommended Solution" (star icon) so that others can benefit from it.
  0  
  0  
#142
Options
Re:[Troubleshooting] Speed limit to 100 Mbps
2025-07-14 20:59:10 - last edited 2025-07-14 21:10:48

I have the same problem with my Archer AX72. After turning on the computer, sometimes I get 1000 Mb/s and sometimes 100 Mb/s. I have a new Cat. 6 cable. Interestingly, if I put the computer to sleep at 100 Mb/s and then wake it up, I get 1000 Mb/s again. What's causing this? Is it the router, the cable, or the computer's motherboard?

  0  
  0  
#144
Options
Re:[Troubleshooting] Speed limit to 100 Mbps
2025-07-15 11:17:40

Hello @Pawel8 ,

Welcome to our community.

I think it's best that you focus on one post to ask questions. In this way, we can focus on the information to locate the problem encountered by your device.

For your situation, please compare different devices to see if they have the same problem.
Is the PC connected by wire? If so, please connect directly to the front-end modem for comparison.

Check Out the Latest Posts: △ Pre-release Firmware for Archer AX80 Supports EasyMesh in AP Mode, DoH/DoT, ECO Mode, and More △Introducing AI QoS: Elevate Your Gaming Experience on the Archer GE800 Gaming Router △Connect TP-Link Archer BE550 to Germany's DS-Lite (Dual Stack Lite) Internet via WAN △ Tether KidShield Test Recruitment - Safeguarding Children's Online Experience
  0  
  0  
#145
Options
Re:[Troubleshooting] Speed limit to 100 Mbps
2025-07-15 20:24:02 - last edited 2025-07-15 22:53:10

  @Joseph-TP 

Yes, I have my desktop computer connected via Ethernet cable. Since I get 1000 Mbps every time I connect it directly to the Huawei modem, but I have to manually enter my login details, I changed my approach a bit:
- I bought a new cable,
- I reinstalled Windows on my desktop computer,
- I connected my desktop computer to a different port (LAN1) on the AX72,
- I connected my laptop to LAN4.
Results:

After about 30 restarts, the laptop still works at 1000 Mbps (on both cables).
- The desktop computer negotiates 100 Mbps approximately every 10 restarts, instead of 1000 Mbps (on both cables).

 

The router is 4 months old. Everything worked fine until I restarted it (after 4 months).

 

Furthermore, when I force Device Manager from Auto Negotiation to 1000 Mbps, I get about 28% packet loss in the test packetlosstest test. When I set it to Auto and return it back to 1000 Mbps, I get 0% packet loss. What's going on here?

  0  
  0  
#146
Options
Re:[Troubleshooting] Speed limit to 100 Mbps
2025-07-17 06:38:40

Hello@Pawel8 ,

Thanks for your detailed reply.

 

From your description, the problem probably started after reinstalling the Windows system on the PC?
1. Connect the PC to different LAN ports of the AX72 for comparison.
2. Please force the LAN port connected to the PC to a negotiation speed of 1000Mbps on the AX72:

Please log in to your router's web management page by visiting: https://tplinkwifi.net
Then, go to Advanced > Internet > Internet Port Negotiation Speed Setting and select "Auto-Negotiation". You can also set the port to "1000Mbps Full Duplex".

 

If possible, I also suggest you contact PC support to check if the PC settings need to be modified.

Check Out the Latest Posts: △ Pre-release Firmware for Archer AX80 Supports EasyMesh in AP Mode, DoH/DoT, ECO Mode, and More △Introducing AI QoS: Elevate Your Gaming Experience on the Archer GE800 Gaming Router △Connect TP-Link Archer BE550 to Germany's DS-Lite (Dual Stack Lite) Internet via WAN △ Tether KidShield Test Recruitment - Safeguarding Children's Online Experience
  0  
  0  
#147
Options
Re:What if my Router Speed is capped at 100 Mbps?
2 weeks ago

  @Kevin_Z Hi, i keep having my LAN speed limited at 100 Mbps.
 

1.  AX1800 Dual-Band Wi-Fi 6 Router, hardware located below:

2. I have rebooted the router, reset it to factory settings and bought a cat8 ethernet cable and have enabled the Internet Port Negotiation Speed Setting to 1000Mbps Full Duplex. 

3. I am testing it with my pc which has plugged in the AV600 Passthrough Powerline Starter Kit. 

4. I purchased the router today and the issue has not gone yet.

5. Model of the ISP modem is DATA FD704G-AE-R410 Single-Fiber 4GE+CATVONU. I checked and it should be having enough bandwith:

  0  
  0  
#148
Options
Re:What if my Router Speed is capped at 100 Mbps?
2 weeks ago

Aether12 wrote

 

3. I am testing it with my pc which has plugged in the AV600 Passthrough Powerline Starter Kit. 

 

 

  @Aether12 

 

Hi,

 

Please note that all "AV600" Powerline adapters that TP-Link sells are equipped with 100 Mbps Ethernet ports.

 

Therefore, whatever you plug into an AV600 Powerline adapter will be limited to a 100 Mbps connection.

  1  
  1  
#149
Options
1131415

Tags

Highlighted Thread Official
About Us
Press
Copyright © TP-Link Systems Inc. All rights reserved.