Troubleshooting What if my Router Speed is capped at 100 Mbps?
This Article Applies to:
TP-Link Routers
Issue Description/Phenomenon:
Some customers may report the speed is limited to 100 Mbps when connected to the TP-Link router, while the speed is much faster and can reach up to 500+ or 900+ Mbps when connecting to the ISP modem directly. If this is what you are experiencing, follow this article to get it resolved.
Troubleshooting Suggestions:
1. Mark certain you are getting a gigabit router, which has gigabit WAN/LAN ports. Some models like Archer C20 and Archer C50 only support 10/100 Mbps WAN/LAN ports, you can find that in the product specifications here and here. If your router only has 10/100 Mbps WAN/LAN ports, you cannot get a higher speed than 100 Mbps, and you need to get a gigabit router.
2. Login to the web GUI of the router, go to Basic > Network Map > click on the Icon for TP-Link router, slide down to the bottom of the page, and you will see the Negotiation Speed of the Ethernet ports in the Ethernet part. You can refer to this article to find more detailed instructions.
3. If the Internet Port Negotiation Speed is not 1000Mbps, go to Advanced > Network > Internet page, choose 1000Mbps Full Duplex, save and reboot the router:
4. If it's still connected at 100 Mbps, try with another Cat5e/6 cable or change the port of your ISP device, where you're connecting the TP-Link router (if possible).
5. If the Internet speed is negotiated correctly at 1000 Mbps, but the LAN gets stuck at 100 Mbps, it is also suggested to try with another Cat5e/6 cable between the router LAN and the client device, try with another client device if that is possible. Follow this thread to troubleshoot further.
6. Try to reset the router to the default factory following the FAQ.
7. Upgrade the router firmware to the latest. You can follow this guide.
If the speed still gets stuck at 100 Mbps after checking all the above, it is suggested to comment below and be sure to provide the following information:
1. Model number, hardware, and firmware version of your TP-Link Router.
2. What troubleshooting have you done, and what are the results? Send us the screenshots about the Negotiation speed.
3. What are the devices that you are testing the LAN speed, and what are the models of the adapters?
4. When did you purchase the TP-Link router, and when did the issue begin to happen?
5. What is the model of the ISP modem that this TP-Link router connects to?
Related Articles:
What if my LAN speed is capped at 100 Mbps
[Solution] Killer Software lower down AX1100's Speed
How to check the negotiation speed of Ethernet ports on the TP-Link Wireless Router?
What should I do if my internet connection is slow?
How to place your wireless router for optimal reception and performance?
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@Kevin_Z I'm having the same issue with AX5400 (AX73).
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Hello
I ordered new Router and Acess Point - TP LINK Router Archert C20 (AC750) V6
I see Archer C20 (AC750) claims that it gives:
300 Mbps (2.4 GHz)
433 Mbps (5 GHz)
But all Archer C20 (AC750) ports are 100 Mbps.
I see that Router Speed is capped at 100 Mbps :(
By Lan Cable i have 100 mbps :(
By WiFI i have 100 mbps :(
I tried another Router and it works gives 300 mbps.
My ISP gives 300 mbps
The cables are CAT6.
I am confused.
How can i have 300 Mbps (2.4 GHz)?
And what can i do with this confusion?
Thanks,
Anatoly
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Thanks for your question @Anatolyg .
300 Mbps (2.4 GHz)/433 Mbps (5 GHz), that are the WiFi speed or link speed from the specification, which are does not mean actual internet speed.
At the bottom of the Archer V20 Overview page, you may know more.
Or it is suggested to read this article.
As your ISP provides 300 Mbps and the Ethernet ports of this router can only be up to 100 Mbps, you may consider to return this product and purchase another one to make the most ISP speed.
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I recently bought a TP-Link Archer ax23 router bt the wan port is constantly showing 100 mbps duplex.i already tried changing the cable and update the port negotiate setting to 1000 Mbps bt it's still the same.what can I do now?
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I recently bought a TP-Link Archer ax23 router bt the wan port is constantly showing 100 mbps duplex.i already tried changing the cable and update the port negotiate setting to 1000 Mbps bt it's still the same.what can I do now?
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What is the model number of the front-end modem connected to the Internet/WAN port of the AX23? Please make sure the modem and its Ethernet port are functioning properly by connecting a computer or another router to that port and verifying you can get a constant 1000Mbps speed.
If the modem and port are confirmed to be working correctly but the AX23 still negotiates at 100Mbps, can I know how long is the cable between the AX23 and the front-end modem? If possible, please try a shorter one.
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