Ethernet Connection Keeps Dropping: Causes and Fixes

Why Ethernet Drops While Wi-Fi Stays Up

Ethernet and Wi-Fi use separate hardware paths inside your router. Ethernet depends on a cable, the wired port on the router, and the network adapter in your computer or console. Wi-Fi depends on the router's radios and antenna system. When the Wi-Fi side keeps working but the wired side drops, the failure is usually in one of the Ethernet components, not in the wireless network.

Before you change router settings, notice the pattern. If only one wired device drops, the cable or that device's adapter is the likely cause. If every wired device drops at the same time, the router port, router power, or router hardware deserves more attention. This guide walks through the checks in order.

Check the Cable First

A damaged or loosely seated Ethernet cable is the most common cause of intermittent wired drops. Unplug both ends, inspect the connector clip, and reseat them until they click. If the cable passes through a wall, under a rug, or next to power cords, try a known-good cable in the same path.

Cable damage can come from repeated bending, pets, furniture, or poor manufacturing. The useful test is simple: wiggle the cable near each connector while you watch the router port's link light. If the link drops when the cable moves, replace the cable. A cable that works in one position and fails in another is a strong clue. For more on cable types and limits, see ethernet cable categories explained.

• Reseat both ends of the cable
• Use a different, known-good cable
• Move the cable away from power cords and sharp edges
• Watch the link light while moving the cable gently

Check the Port and the Device Adapter

The Ethernet port itself can fail even when the rest of the router works. Move the cable to a different LAN port on the router. If the connection stabilizes, the original port may be damaged or have dirty contacts. If every port drops, the problem could be the router's wired switching hardware, its firmware, or its power supply.

On the computer or console side, the Ethernet adapter can also cause disconnects. Some operating systems include an Ethernet power saving mode that drops the link to save energy. Turn that setting off, or update the adapter driver, and then test again. If you use a wall plate or network switch, connect directly into the router to remove that extra hardware. See how to test an Ethernet cable with your router for the full check.

Check Router Settings and Firmware

Once the cable and port are cleared, look at the router. An outdated firmware can contain bugs in the Ethernet driver or in power management code. Update the firmware through the vendor's update page or app, then reboot the router. Keep your router on a supported firmware version.

Advanced settings can also interfere with a wired link. If you manually changed speed, duplex, or VLAN settings, try resetting that port to auto-negotiation and to the default LAN VLAN. Disable features you do not need, such as link aggregation on a single cable, and confirm that the port is not assigned to a separate network. If you are not sure how to start, read router firmware updates explained or how to troubleshoot no internet.

Check Power, Heat and Physical Safety

A router that loses power briefly or overheats can drop every wired link while the Wi-Fi radio recovers at a different time. Give the router room to breathe, confirm the power adapter is firmly connected, and avoid running the router from an overloaded power strip. The U.S. Consumer Product Safety Commission publishes home electrical and fire safety education resources, and those basic precautions apply to networking gear.

Heat-related drops often happen after the router has been running for hours. If the wired connection drops after a long session, then works after a reboot, heat or power is a likely suspect. Keep the router away from other warm equipment and out of enclosed cabinets. Keep cables away from heat sources and sharp bends at the same time.

Keep Security in Mind While You Troubleshoot

While you are checking cables and ports, do not ignore network security. The Wi-Fi Alliance describes WPA3, Protected Management Frames, and other protections in its security materials, and NIST's cybersecurity and privacy work offers broader guidance for securing a home network. A compromised router can behave erratically, including dropping wired links.

If you see unknown devices, unexpected admin logins, or settings that change on their own, treat the router as potentially compromised. Change the admin password, update the firmware, and review the connected device list. For a refresher on the basics, see router security basics.

When to Replace or Upgrade

If a known-good cable, a different port, and a firmware update do not stop the drops, the router's Ethernet hardware may be failing. A router that loses wired connectivity across all ports is difficult to trust for gaming, video calls, or a home office. At that point, replacing the router is often more practical than repairing it.

For a stable wired network, look for a router with enough LAN ports for your devices and the port speed that matches your internet plan and local needs. The right choice depends on your home size and the devices you connect. Browse best Wi-Fi 6 routers, best gaming routers, or best mesh routers to match the next router to your setup. If you simply need more wired connections, a network switch can extend the router's ports without requiring a new router.

What to pick for your use

Questions

Why does Ethernet keep dropping while Wi-Fi stays connected?

Ethernet and Wi-Fi use separate hardware paths in the router. A problem in the cable, port, or wired adapter can interrupt Ethernet without affecting Wi-Fi.

Can a bad Ethernet cable cause intermittent drops?

Yes. Damaged conductors, loose connectors, or a strained cable can pass traffic at some times and fail when moved or heated. Test with another known-good cable.

Why does my wired connection drop after a few minutes?

The cause may be an Ethernet power saving setting on the computer, a failing router port, or overheating after the router warms up. Test with another device and another port.

Should I turn off Wi-Fi when I use Ethernet?

Not required. Keeping Wi-Fi on lets other devices connect. If your computer is choosing Wi-Fi over Ethernet, disable Wi-Fi on that device to force the wired link.

Is a router reboot a real fix?

It can fix a temporary issue such as a stuck Ethernet driver or exhausted router memory. If drops return quickly, look for a hardware, heat, or firmware cause.

When should I buy a new router?

When a known-good cable and a different port still drop, and the router is out of support or has failing ports, replacement is usually the practical option.