Ethernet link speed limited to 100mbps
Issue started about 2 months ago.
Link speed on all my wired connected devices is linked at 100mbps on the coda 4680. Wi-fi speeds are fine.
Tried resetting and restarting router no change.
Cables are all fine, did test with different cables and devices. Issue is from router firmware or router ports (but to have all 4 defective is rare).
I suspect the firmware.
When was the latest firmware uploaded?
Answers
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In addition, if i unplug/plug or restart router i will get link speeds of 1000mbps but after a few minutes or hours it will drop to 100mbps.
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Fizz is pushing modem upgrades automatically and you can't force it.
Try to follow these troubleshooting steps:
Make sure that you test with a Cat 5e or Cat 6 cable. The LED on the modem's LAN port should glow yellow for a 1 Gbps connection and green for a 10/100 Mbps connection.
Make sure that your hardware drivers are up to date.
If you are on Windows, go to Device Manager > Network adapters, right-click your adapter, select Properties, go to the Advanced tab, find the Speed & Duplex option, and set it to "Auto Negotiation" or "1.0 Gbps Full Duplex".0 -
Does anyone have been having issues with ethernet link speeds with firmware 7.3.5.1.2b21 ?
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@Andrei_ref_R7VK1 said:
Fizz is pushing modem upgrades automatically and you can't force it.Try to follow these troubleshooting steps:
- Make sure that you test with a Cat 5e or Cat 6 cable. The LED on the modem's LAN port should glow yellow for a 1 Gbps connection and green for a 10/100 Mbps connection.
- Make sure that your hardware drivers are up to date.
- If you are on Windows, go to Device Manager > Network adapters, right-click your adapter, select Properties, go to the Advanced tab, find the Speed & Duplex option, and set it to "Auto Negotiation" or "1.0 Gbps Full Duplex".
Cables are Cat 6 and Cat 6A (fluke tested).
Running on Mac OS with latest updates on both devices. All devices are on auto negotiate and even if i set to 1gbps it will drop to 100mbps eventually.
I know i can’t push updates and it’s auto from Fizz but they must know when they did the last update on my router?
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If you get 1000 Mbps after the modem restart and few minutes later it drops to 100 Mbps, this looks like a network speed negotiation between the hardware. Do you have any switches in between? If yes, try to bypass them by connecting to your modem directly.
Additionally, connect to your modem 192.168.0.1, go to Advanced -> Switch setup -> Switch control -> Select a port and change from Auto Negotiation to 1Gbs full duplex -> Save changes.
On your Mac force 1Gbs as well.
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@Andrei_ref_R7VK1 said:
If you get 1000 Mbps after the modem restart and few minutes later it drops to 100 Mbps, this looks like a network speed negotiation between the hardware. Do you have any switches in between? If yes, try to bypass them by connecting to your modem directly.Additionally, connect to your modem 192.168.0.1, go to Advanced -> Switch setup -> Switch control -> Select a port and change from Auto Negotiation to 1Gbs full duplex -> Save changes.
On your Mac force 1Gbs as well.
No switches. Will try forcing 1gbps on both ends
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PC or Mac ? Check for update of your driver.
Check settings: Windows 10 and 11
Right‑click on the Start button → select Device Manager.
Expand Network adapters → right‑click your Ethernet adapter → choose Properties.
Go to the Advanced tab.
Find the option called Speed & Duplex.
Set it to Auto Negotiation or 1.0 Gbps Full Duplex.
To check the current link speed:
Press Windows + I → open Settings.
Go to Network & Internet → Ethernet.
Click your Ethernet connection → scroll down to Link speed (Receive/Transmit).
If it shows 1.0 Gbps, your card and connection are running at gigabit speed.
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