this post was submitted on 25 Nov 2023
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I have cat 6 cabale and router and laptop have gbps port and also my network provider support gbps speed still my network shows me its 100 mbps any solution?

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[–] [email protected] 2 points 10 months ago

Test patching directly into router, not via internal cabling.
Test different cable.
Test with different laptop.

Just for fun: test WiFi, preferably 5 GHz. If that nets you more than 100 mbit then your router/ISP is the issue.

Also, what do you get when testing on e.g. Speedtest.net?

[–] [email protected] 2 points 10 months ago (1 children)

check for damaged pins in ethernet ports. gigabit uses 4 pairs and 100 meg uses 2 pairs so maybe a bad connection in one of the ports.

[–] [email protected] 1 points 10 months ago

We have same problem. Wiggling cable in wall port will fix it up.

[–] [email protected] 1 points 10 months ago

The better question here are what models are your laptop and router? That would rule them out in terms of compatibility with gigabit speed.

[–] [email protected] 1 points 10 months ago (1 children)

What are you hooking your laptop up to? Make and model? And can you verify in devicemanagement that your laptop has a gigabit NIC?

[–] [email protected] 1 points 10 months ago

Yes my nic has gigabit support i check alredy

[–] [email protected] 1 points 10 months ago (1 children)

Yeah I suspect theres a cable somewhere not playing.

[–] [email protected] 1 points 10 months ago (2 children)

I m ordering new cable for that to see what a problem

[–] [email protected] 1 points 10 months ago

Good idea. Check all that may be able to influence the speed. I spent an hour scratching my head about this same problem once and it was a Cat5 (fe) cable between my switch and router - I kissed it because I kept looking at the patching on the port. If cables test out fine then go 'upstream'.

[–] [email protected] 1 points 10 months ago

And connect it to router directly. You can have problém in Wall socket.

[–] [email protected] 1 points 10 months ago

Are you plugged directly into your router or into a switch? What model is your network card on your computer? What model is your router or any switched in between your computer and the router? There is probably a device that is a 10/100 device instead of a 10/100/1000 device but we need more info to diagnose the issue.

[–] [email protected] 1 points 10 months ago (1 children)

Cat 5e also supports gigabit.

[–] [email protected] 1 points 10 months ago
[–] [email protected] 1 points 10 months ago

Bad cable somewhere.

[–] [email protected] 1 points 9 months ago

Here are my checklist when this happens.

  1. Check the NIC on the machine and see if it supports 1 GBPS
  2. Check the ethernet wire to see if the cable is properly terminated or not.
  3. Check the port on the switch/router you are connecting to and see if that's the culprit.
[–] [email protected] 1 points 10 months ago

Check you are not going through a surge protector on the ethernet. Couple years ago for some reason the ethernet surge protector built into my power strip reduced me to 100mbps connection.

[–] [email protected] 1 points 10 months ago

large chunk of laptops are 100mb ports. for cost cutting.

cheaper to do faster chip with wifi . then a a wired chip.

[–] [email protected] 1 points 10 months ago

Gigabit needs four pairs connected. If any are damaged, it'll fall back to 100Mbps which requires only two pairs. So check your cable. An Ethernet cable tester is quite cheap but handy.

[–] [email protected] 1 points 10 months ago

Do you have any other device in your home that you know is gigabit capable? If so, is it possible for you to use the same cables and connect to another device and see if you get a 1Gbps link? Usually TVs with gigabit ports can tell you what the connection speed. Or you may be able to see the connection speed if you log into the router management interface.

There is also the possibility that the NIC speed on your laptop is set to 100mbps. It might be worth double checking that just to eliminate that possibility, and if it is, set it to auto. And while checking that, make sure the duplex is set to auto.

If the same cables give you gigabit speed with other devices, and the NIC speed and duplex is good, take a look at the pins on the rj45 port on your laptop, make sure they look good and not broken/bent. If they look good as well, then go to ASUS's website and download the latest LAN drivers. Then uninstall the current driver's for the network adapter and install the newly downloaded drivers.

If that still doesn't work, last thing to check is if your laptop gives you a gigabit connection elsewhere. Maybe go to a friend's house and use a cable they might have and test it.

If it still doesn't work, then it's likely your Ethernet port is fault. Only option would be to either get ASUS to replace the laptop if it's under warranty otherwise, get it repaired out of warranty, although that might cost a fair bit of money. Cheapest option would be to purchase a USB3.0 to RJ45 Gigabit adapter (making sure to use a USB 3 port).

[–] [email protected] 1 points 10 months ago (1 children)

Most people here are mentioning hardware or bottleneck issues, and those guesses are certainly very possible, but have you checked your link speed / duplex settings? If you Google it you should find instructions for making sure it's set to allow the right speeds.

[–] [email protected] 1 points 10 months ago

This maybe set on 100 and not 1000. Check the nic settings

[–] [email protected] 1 points 10 months ago

Test the cable using another device.

If the other device connects at 1gb then it’s not the cable. Look at your nic settings and make sure it’s set to auto/auto link speed/duplex. If it is, consider getting a different nic.

[–] [email protected] 1 points 10 months ago

I've had this problem. The issue is probably cable termination, and if it's not that, the next most-likely answer is a problem with the shielding and/or twisting along the run. 100 Mbps is the same as 1 Gbps with a higher error rate. Swap out the cable if you can. If still experiencing the problem, try different devices on each end if you have them available.

[–] [email protected] 1 points 10 months ago

Stop guessing and test Here is a link to a thread about testers

https://www.reddit.com/r/networking/s/6MFnkLAHLy

[–] [email protected] 1 points 10 months ago

I have a ROF zephyrus laptop and for some reason it's gigabit Ethernet card started stating it was 10/100 and nothing I did would get it off FE.

It has WiFi 6 and I use a thunderbolt dock that has Ethernet and because of that I'm not that worried, but ports can and will just go bad or drop down to FE.

[–] [email protected] 1 points 10 months ago

It's your NIC

[–] [email protected] 1 points 10 months ago

It's likely just a driver update. I had a similar problem and that fixed it

[–] [email protected] 1 points 10 months ago (1 children)
  1. try another cable - make sure it is CAT6 or better CAT6A
  2. Have a look if (even if it says so) Auto-MX is active - if it is, set connection speed manualy to 1gbps
  3. If there is another Port on your Providers Router, go for it
[–] [email protected] 1 points 10 months ago (1 children)

In 2. What is auto mx ? Are you talking about properties of realteck drivers?

[–] [email protected] 1 points 10 months ago (1 children)

Properties of your NIC - but also on the router - if not possible (stuff from ISP)try another port on your router first if it has more than one "Lan ports"

[–] [email protected] 1 points 10 months ago

I already tried all the port s and also change nic settings

[–] [email protected] 1 points 10 months ago

Your laptop probably has a broken ethernet port.

[–] [email protected] 1 points 10 months ago

If the cable is good and is a direct connection between device and switch/router, then it’s a hardware issue. Gig requires all 4 pairs, 100Mbps only 2.

[–] [email protected] 1 points 10 months ago

its cable most likely. try another one.

[–] [email protected] 1 points 10 months ago

Are you paying for gigabit speeds?

[–] [email protected] 1 points 10 months ago

This just happened to me today lol, turns out my old Dell laptop doesn't have a gigabit port. Got full speed on Apple TV and new laptop.

[–] [email protected] 1 points 10 months ago (1 children)

99 times out of 100 this is an issue with the cable. Be it the one in the computer or the one in the wall.

[–] [email protected] 1 points 10 months ago

Laptop port has problem i figure out

[–] [email protected] 1 points 10 months ago

Almost certainly the NIC in the PC. The fact that it’s exactly 100 sounds like a misconfiguration

[–] [email protected] 1 points 10 months ago

I've seen 5-6 Asus Zephyrus laptops refuse to connect at anything other than 100Mbps, even after turning off the auto-neg and setting it to 1G, they would still connect to the switch at 100M.

This has all been within the last 6 months, I wonder if they released a broken driver for whatever NIC they're using.

[–] [email protected] 1 points 10 months ago

Even if you have a cat 6 rated cable depending on the cable itself, the NIC and your router will validate if it can reach 1GB speeds, if the twisted pairs in the cat 6 cable are degraded in anyway then the NIC and the router will negotiate to a speed it can support, which may be your issue here. I would try using another cat 6 cable you know is good to validate if its just a bad cable or not.

or lets say ha

[–] [email protected] 1 points 10 months ago

Not sure why this isn't a more common solution, but check your negotiation settings in Speed and Duplex.

https://www.youtube.com/watch?v=km4lbL-JP74

[–] [email protected] 1 points 10 months ago

Bad cable probably.

[–] [email protected] 1 points 10 months ago

Classic Layer 8 issue

[–] [email protected] 1 points 10 months ago

If you terminated your own cables, this is the issue.

[–] [email protected] 1 points 10 months ago

Thanks you all my buddy to hellping me it got resolved .my laptops ethernet port has a problem its supports 1 gbps in past but maybe some hardware got damged recently so that giving me 100 mbps.

[–] [email protected] 0 points 10 months ago (2 children)

im no expert but that picture right there is telling you that your adapter is only 100Mbps

[–] [email protected] 2 points 10 months ago (1 children)

You are right that you are no expert. You are unable to help here.

[–] [email protected] 0 points 10 months ago

im glad you are here to straighten me up. thank you im going to delete my comment now

[–] [email protected] 1 points 10 months ago

It's telling you the adapter is connected at 100 Mbps, but it could support gigabit or more, but something else along the chain doesn't and that's why it's running at that speed.