Speed Drops on Archer C80 Router After 8-9 Hours (WAN Replug Resolves Issue)
I have a 300 Mbps internet connection and use the TP-Link Archer C80 router. After approximately 8-9 hours of usage, the internet speed drops significantly to around 90-100 Mbps. However, when I unplug and replug the WAN cable, the speed restores to 300 Mbps temporarily before the cycle repeats.
Could this be due to a firmware or hardware-related issue? Has anyone else experienced a similar problem, and are there any permanent solutions to prevent the speed drop?
Let me know if additional information is required.
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Hi @HimanshuRahi,
When the issue occurs, please log in to the web interface of router. Please check what is the negotiation speed of WAN, LAN port?
Go to Network Map-->Archer C80-->Ethernet Status
Auto-negotiation allows a port on a router to communicate with the wired device to determine the optimal duplex mode and speed for the connection.
To enable the Auto-Negotiation on the internet port, Please log into your router's web management page by visiting: https://tplinkwifi.net
Then go to Advanced->Network->Internet-> Internet Port Negotiation Speed Setting and select "Auto-Negotiation". You can also set the port to "1000Mbps Full Duplex".
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Hi @HimanshuRahi,
When the issue occurs, please log in to the web interface of router. Please check what is the negotiation speed of WAN, LAN port?
Go to Network Map-->Archer C80-->Ethernet Status
Auto-negotiation allows a port on a router to communicate with the wired device to determine the optimal duplex mode and speed for the connection.
To enable the Auto-Negotiation on the internet port, Please log into your router's web management page by visiting: https://tplinkwifi.net
Then go to Advanced->Network->Internet-> Internet Port Negotiation Speed Setting and select "Auto-Negotiation". You can also set the port to "1000Mbps Full Duplex".
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@Joseph-TP As you mentioned, I have changed the Negotiation Speed to 1000 Mbps/full duplex. Will the speed not drop now?
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Hi @HimanshuRahi,
Did you test the internet again after you changed the Negotiation Speed to 1000 Mbps/full duplex? Is the speed stable?
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