r/techsupport Nov 12 '22

Why is my Ethernet slow Open | Networking

I get about 220mbps on Ethernet connected to my pc using a cat6 cable and my pc has up to 10gb connection port. I know 220mbps isn’t slow but when I’m next to my router and I use Wi-Fi on my phone I get 380/400mbps. I have all the latest drivers installed. The cable Is new. I’m running windows 11

69 Upvotes

45 comments sorted by

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16

u/tlokzz90 System Administrator Nov 12 '22

Would you mind sharing a SpeedTest.net screenshot?

13

u/fvkstain Nov 12 '22

Hold on I just switch my router to modem mode and now getting 400mbps. This is good however I can’t keep it in modem mode and have to switch back to Wi-Fi as other people use the Wi-Fi. Do you know what could be causing the problem. I am home alone at the moment so no one else is affecting the speed.

27

u/tlokzz90 System Administrator Nov 12 '22

Possibly QoS settings on the router.

9

u/luigithebeast420 Nov 12 '22

If you can I’d suggest getting a router and putting the original router into modem mode.

3

u/fvkstain Nov 12 '22

That seems to be the only option giving my router currently has no QoS settings not allowing me to prioritise Ethernet.

2

u/luigithebeast420 Nov 13 '22

That’s another way you can get rid of double nat.

1

u/mushpuppy Nov 13 '22

Assuming you have FIOS, you might try going into your router and disabling ipv6.

1

u/Fluffleblow Nov 14 '22

Is there any benefit to keeping it enabled in the first place?

1

u/mushpuppy Nov 14 '22

As far as I know, only if you have enough devices on your local network to need it.

5

u/TwennySeven Nov 12 '22

QoS settings most likely, if you’re going directly from your pc to the router. If you have other hardware components in between you might need to check those out

2

u/fvkstain Nov 13 '22

Yes QoS is most likely the problem but my isp for some reason makes really shitty routers so I have no option to change the QoS settings.

3

u/cluckay Nov 13 '22

AT&T?

2

u/fvkstain Nov 13 '22

Virgin media (UK)

2

u/Just_Inspired Nov 13 '22

I've had Virgin since they were Blueyonder/Telewest. Their cable modem/routers are pretty awful as routers so I've always used them in modem mode with my own router.

3

u/Zeusie92 Nov 13 '22

You can buy your own router if the one that is given to you by your isp can't deliver the intended speeds you're paying for. The ISP does tend to get cheap routers. Virtually any router you find at Walmart would work or you can find modern ones online

3

u/LiquidGoat Nov 13 '22

what speed are you expecting to be getting? 10,000mpbs?

because youre on windows, try checking your tcp autotuning level setting in command prompt with netsh interface tcp show global | findstr Auto-Tuning

If that says disabled then try changing it to experimental netsh interface tcp set global autotuninglevel=experimental and run another speed test.

other possibilities are how many PCIe lanes your 10gb network card is using, etc

1

u/fvkstain Nov 13 '22 edited Nov 13 '22

No I am trying to reach 400mbps which is double what I am getting at the moment. I’ve tried the commands but it doesn’t seem to do anything and for the network card, I don’t have one, the 10gb input is direct to my motherboard so I’m not sure how to check the details of the NIC

2

u/DeFex Nov 13 '22 edited Nov 13 '22

Could it be the speed of the drive on the source you are copying from? If the NIC is configured for auto negotiation it can switch to half duplex and / or slower speed because of the router being configured that way or some other problem. Also, make sure to cable isn't running close to any power adapters, some of them generate a lot of interference.

1

u/fvkstain Nov 13 '22

I’m not sure exactly what you’re trying to say. What do you mean by speed of the drive? And I have a integrated NIC, not sure if it is configured for auto negotiation. Sorry about this but I don’t know much on this topic.

1

u/DeFex Nov 13 '22 edited Nov 13 '22

That part only matters if you are testing by copying files from another computer, If you are using internet speed test, dont worry about it.

You can see the integrated NICs settings. In device manager, properties of the NIC, advanced tab (thats how it is in win 10, they might have changed it).

1

u/RED_TECH_KNIGHT Nov 12 '22

Does your router have gig ports?

2

u/tlokzz90 System Administrator Nov 12 '22 edited Nov 13 '22

Then it would be 100Mbps ports. He stated he's getting 220 which is greater than 100.

EDIT: Unless you meant what MBps would a gig port get.

1000 / 8 = 125MBps.

Added more context because people seem to miss my original logic.

10

u/RED_TECH_KNIGHT Nov 12 '22

220mbps

220 Mbps = 27.5 MB/s

Right. My bad. Need more coffee.

-3

u/homiej420 Nov 12 '22

Router technology sometimes refers to megabits per second so you need to covert to bytes before you show the calculation

1

u/tlokzz90 System Administrator Nov 12 '22 edited Nov 13 '22

Huh?

EDIT: What does that have to do with my comment?

-2

u/BlackDO34 Nov 13 '22

Bits =/= bytes

1

u/91gsixty Nov 13 '22

Tcp/ip reset

Disable antivirus. Inspect filters

Set interface to desired speed eg. 1gig

1

u/nightlyear Nov 12 '22

Do you have the option to hardwire into the router? I’m assume you have a modem/router combo? Can you get a dedicated modem and a sep router if that’s the case?

1

u/fvkstain Nov 13 '22

Yes I can however I’m trying to avoid it. What’s weird is I can use other devices such as a ps5 and I’ll get 400mbps but my pc for some reason doesn’t get it unless I put my router into modem mode.

1

u/nightlyear Nov 13 '22

What is your wireless receiver specs? Why do you avoid the direct plug in?

1

u/FlyingNinjaGypsy Nov 13 '22

crazy but if u have verizon try turning off ipv6

0

u/fvkstain Nov 13 '22

Na I’m in the Uk, I have virgin media. I always thought Verizon was just a phone service.

1

u/Johnsmith13371337 Nov 14 '22

What tests exactly are you performing on each device to get these readings?

1

u/Xifax22 Nov 15 '22

Hey OP, did you find a solution?

1

u/fvkstain Nov 15 '22

Nope, I’m gonna try asking my isp why they’re throttling my Ethernet

0

u/Lelouch25 Nov 12 '22

Check your cable. It might be kinked somewhere.

1

u/fvkstain Nov 13 '22

My first initial thought but it’s not the cable.

1

u/Pretend_Selection334 Nov 13 '22

Kinked? 😂😂😂😂 it’s not a garden hose. 😂

1

u/Lelouch25 Nov 13 '22

Eh mine kinked. I use a 50ft to drag from my living room to my room. I use 2-3 rubber step things so I don’t trip on them.

1

u/Pretend_Selection334 Nov 13 '22

Oh I understand they can kink. I’ve seen this all the time. My point was this doesn’t cause data to slow down on the cable as if it was a garden hose slowing down water.

2

u/PositivelyAcademical Nov 13 '22

I wired my own house last summer. 13 runs of cat6a, including some pinned to the side of the house outdoors (only way to get to two rooms without completely demolishing one wall). 12 runs ran perfectly 1Gbps (don’t have any 10gig equipment). One run worked fine, but started to notice speeds dropping to 100Mbps occasionally, of course it was the one to the switch for the office. After days of troubleshooting, rewiring the keystones, etc; ended up pulling that cable and doing a new run 4 feet over, problem solved. Sometimes cables in walls just aren’t happy.

But that’s unlikely going to u/fvkstain’s issue; with cable issues most equipment will lower itself to the highest stable standardised speed 10Mb/100Mb/1Gb/2.5Gb*/10Gb.

* 2.5Gbps only if supported. Not all 10Gbps rated equipment support physical multi-Gig connections.

1

u/Lelouch25 Nov 13 '22

Long term kink caused my cable to crack at that location and caused my internet to drop all the time.

1

u/Pretend_Selection334 Nov 13 '22

Yes, because the cable broke and connecting wires were severed. Same thing could happen if you slash it with a knife.