cat 6 in the wall, cat 5e to pc

Forums › LAN (ethernet/Wifi/routers/Bluetooth) › cat 6 in the wall, cat 5e to pc

uvprotector

7 posts

Wannabe Geek

#305729 31-May-2023 13:17

Hi,

Here is another question i do not understand why.

My pc is a month old and has a Realtek PCIe GbE Family Controller.

I have utp cat6 in my walls. From my wall socket to the pc I also use a cat6 into the ethernet port of the pc.

I get a speed of 100/100 (Mbps)

However if I use a cat5e from wall to pc I get 1000/1000 (Mbps)

Anybody experience the same issue or has an answer?

Thanks

openmedia

3329 posts

Uber Geek

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#3082766 31-May-2023 13:29

You've probably got an issue with one of the strands in the Cat6 cable - so you're dropping back to 10/100.

Generally known online as OpenMedia, now working for Red Hat APAC as a Technology Evangelist and Portfolio Architect. Still playing with MythTV and digital media on the side.

Ge0rge

2055 posts

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#3082767 31-May-2023 13:31

Have you a second cat6 cable to try? Sounds like a dodgy cable to me.

wellygary

8323 posts

Uber Geek

#3082768 31-May-2023 13:37

Ge0rge:

Have you a second cat6 cable to try? Sounds like a dodgy cable to me.

Yip, if changing the cable gets you 1GB and going back to the old cable drops it back to 100Mbs, then dollars to doughnuts you've got a partly faulty cable, toss it out....

uvprotector

7 posts

Wannabe Geek

#3083379 1-Jun-2023 16:55

Tried a different cable which is attached to laptop and provides 1000Mbps.

Also tried to cable that was in the PC into the laptop and also gives laptop 1000Mbps indicating cable is ok.

Actually my son has an older gaming pc which shows the exact same symptoms also with Realtek network card.

I wondered if it could be the wall socket (PDL iconic) but the laptop works fine.

I have emailed realtek, will see if they get back with anything.

Ge0rge

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#3083381 1-Jun-2023 17:02

I'm confused.

You swapped out the cable, the speeds went up. You tried a laptop in the same port, and it was 1Gbps - so you've proved its not the port, or the PC - and now you are emailing the network card company to ask what exactly?

CYaBro

4585 posts

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#3083385 1-Jun-2023 17:33

Just use the CAT5e patch cable.

Such a short distance won't make any difference to the speed compared to a CAT6 cable.

Opinions are my own and not the views of my employer.

nzkc

1572 posts

Uber Geek

#3083394 1-Jun-2023 18:13

Can you manually set the NIC to 1000 rather than auto negotiate?

But as others say just use the cable that works!

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uvprotector

7 posts

Wannabe Geek

#3083458 1-Jun-2023 18:46

@Ge0rge I see that the first sentence confused you. I meant that I used the cable that is in the laptop which gives the laptop 1gbps but did only provide 100Mbps to pc.

@CYaBro will do that ofcourse but am trying to find out why this happens and to see if maybe others had a similar problem.

@nzkc have tried that but did not make a difference.

I had wondered if it was my UniFi USG-3P, US-24-250W switch and CloudKey 1 but then the laptop would/should show the same problem.

MadEngineer

4278 posts

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#3083482 1-Jun-2023 20:28

I think we'd all love a photo of the terminations on the back of that PDL module.

You're not on Atlantis anymore, Duncan Idaho.