Port Health

What is port health?

Port health is the overall condition of the Ethernet ports on your router, switch, or access point. Each port has a few things that can go wrong: it might connect at a slower speed than expected, operate in a limited mode, or keep disconnecting and reconnecting.

Think of Ethernet ports like electrical outlets in your house. Most of the time they just work, but a loose connection, corroded wiring, or a faulty outlet can cause flickering lights or devices that don't get enough power. Port health tells you whether your network's "outlets" are all working properly.

Why it matters

A single unhealthy port can slow down everything connected through it. If your main computer or a security camera is plugged into a port that negotiated at 100 Mbps instead of gigabit, that device is bottlenecked to a fraction of your network's real speed. Worse, a flapping port can cause brief outages that are hard to track down because they come and go.

Most people never check their Ethernet ports because the lights on the front of the router all look the same. Network Weather reads the actual port status from your equipment so you can spot problems without crawling behind furniture to inspect cables.

What you can do

• Check the port health dashboard for any warnings, then focus on the specific port that is flagged
• If a port shows a slow speed, try replacing the Ethernet cable first; that fixes the problem more often than not
• Unplug and replug the cable on both ends to reseat the connection
• Try moving the cable to a different port on the same switch or router to see if the problem follows the cable or stays with the port
• If a port keeps flapping (disconnecting and reconnecting), the cable may be damaged or too long; Ethernet cables should be under 100 meters (328 feet)
• If the port itself is faulty and swapping cables does not help, you may need to replace the switch or router

What Network Weather shows you

Network Weather checks each Ethernet port on your router and managed switches for speed, duplex, and link stability issues.