internet speed limited to 100mbps

[d00m1ord]

Just now, 191x7 said:

And now we know the issue is your PC.

 

Do you have any software that could affect the ethernet, like some Internet optimization tools (cFos, NetLimiter, ...)?

 

Were there any power outages recently, thunderstorms etc?

i dont think i have any software for networking. also no power issues recently.

[191x7]

1 minute ago, d00m1ord said:

i dont think i have any software for networking. also no power issues recently.

Can you boot a live Linux (like Ubuntu) and check if the Ethernet speeds are OK when using it?

[d00m1ord]

Just now, 191x7 said:

Can you boot a live Linux (like Ubuntu) and check if the Ethernet speeds are OK when using it?

i would have to get ubuntu but sure. I will have to do that tomorrow and get back to you

 

[191x7]

52 minutes ago, d00m1ord said:

i would have to get ubuntu but sure. I will have to do that tomorrow and get back to you

 

That wil ltell us if it's the motherboard or the Windows (OS).

[d00m1ord]

21 hours ago, 191x7 said:

That wil ltell us if it's the motherboard or the Windows (OS).

so I got Ubuntu running off a usb stick. Do I need to install any drivers for it to run at 1Gbps? Currently just booting it up and checking the settings it is saying 100Mbps.

[191x7]

1 hour ago, d00m1ord said:

so I got Ubuntu running off a usb stick. Do I need to install any drivers for it to run at 1Gbps? Currently just booting it up and checking the settings it is saying 100Mbps.

It's the computer.

Does everything else work? If yes, you might need to get a network adapter.

[Falcon1986]

On 11/6/2022 at 9:35 AM, d00m1ord said:

cable is good it gives 250mbps when plugged into my laptop.

On 11/6/2022 at 12:36 PM, d00m1ord said:

no it shows 1Gbps on the laptop but 100mbps on the pc

On 11/6/2022 at 3:11 PM, d00m1ord said:

if i plug them into each other then they both say 100mbps

Have you tried a new ethernet cable (Cat5e or better)? Cable defects can have different effects on performance from one ethernet adapter to another.

 

On 11/6/2022 at 9:43 AM, d00m1ord said:

the cable to my switch was crimped by my dad i dont know how he did it but the cable to my computer is one supplied by Virgin

How is the switch involved in this? Do all ports in the network chain support 1Gbps?

 

Also, from the command prompt, run the following command and tell us what is shows under ‘Receive Window Auto Tuning Level’:

netsh interface tcp show global

 

If it’s disabled, enable it and test after reboot…

netsh int tcp set global autotuninglevel=normal

 

If it’s enabled, disable it and test after reboot…

netsh int tcp set global autotuninglevel=disabled

[d00m1ord]

19 hours ago, Falcon1986 said:

Have you tried a new ethernet cable (Cat5e or better)? Cable defects can have different effects on performance from one ethernet adapter to another.

 

How is the switch involved in this? Do all ports in the network chain support 1Gbps?

 

Also, from the command prompt, run the following command and tell us what is shows under ‘Receive Window Auto Tuning Level’:

netsh interface tcp show global

 

If it’s disabled, enable it and test after reboot…

netsh int tcp set global autotuninglevel=normal

 

If it’s enabled, disable it and test after reboot…

netsh int tcp set global autotuninglevel=disabled

I have tried at least 3 cables all cat 6.

 

the switch is the only break in the cable from my router to my pc

 

so i ran the command propt and it was enabled. So i disabled it and rebooted my pc and now i am getting 250mbps and when i check control panel it says 1Gbps now. What did that command do?

[Needfuldoer]

Make sure your network card isn't hard coded to use a 100 meg connection. It should be set to "Auto Negotiation".

 

https://www.technology.pitt.edu/help-desk/how-to-documents/pittnetwired-configuring-windows-10-wired-publicly-accessible-network

 

 

If that's not it, check the physical network connector on your PC. 10/100 Ethernet only needs two pairs of conductors in the cable, but Gigabit needs all four. If some of the pins are shorted or marginal, it might be falling back to 100 meg just to make sure you have a stable connection.

[d00m1ord]

3 hours ago, Needfuldoer said:

Make sure your network card isn't hard coded to use a 100 meg connection. It should be set to "Auto Negotiation".

 

https://www.technology.pitt.edu/help-desk/how-to-documents/pittnetwired-configuring-windows-10-wired-publicly-accessible-network

 

 

If that's not it, check the physical network connector on your PC. 10/100 Ethernet only needs two pairs of conductors in the cable, but Gigabit needs all four. If some of the pins are shorted or marginal, it might be falling back to 100 meg just to make sure you have a stable connection.

i know my ports are not coded to only use 100mbps as i checked this the other day and they both said auto negotiation. i have checked both ports and they look to be fine and undamaged and after running the command line Falcon1986 gave me earlier i am now getting the correct speed. i now want to know what exactly that command line did and what it changed