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Message 1 of 12

Gigabit speeds

Hi Folks

Quick Q if I can... I'm not getting gigabit speeds to a hardwired laptop... I think I have tracked the problem down to the last cable in the chain... (the path from the router is cable from switch to wall socket, internal cable from socket to another socket and finally the cable from socket to laptop that I seem to think is dodgy.

I've plugged a patch cable into the last socket to the laptop and get 1Gb speed hence thinking its that last cable.  It is a piece of maybe 10m cable that I have made myself by putting connectors on using the same cat5e cable I have used elsewhere to network the house over which I don't seem to have any other problems... I have checked the cable with my continuity tester and it says it's fine...

What could the problem be?

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Message 2 of 12

Re: Gigabit speeds

When you say switch I assume you mean an un-managed one, are you sure that is gigabit? some are only 10/100 Mb/s 

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Message 3 of 12

Re: Gigabit speeds

Hi there!  Yes its a gigabit unmanaged switch (TP Link TL-SG1024D).  I get gigabit speed on all connections currently barring the one that I mentioned.

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Message 4 of 12

Re: Gigabit speeds

Does the laptop have a gigabit network card? 

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Message 5 of 12

Re: Gigabit speeds

yup 🙂
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Message 6 of 12

Re: Gigabit speeds

Oh... How close to vmax are you getting? I'd expect some drop off due to bottlenecks in the system though.

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Message 7 of 12

Re: Gigabit speeds


@gingerangleswrote:

Hi there!  Yes its a gigabit unmanaged switch (TP Link TL-SG1024D).  I get gigabit speed on all connections currently barring the one that I mentioned.


Is the laptop connected to port 16 by any chance? see below

Network Switch.jpg

 https://static.tp-link.com/2020/202007/20200706/7106508931_UnmanagedEasy%20Smart%20Rackmountable%20S...

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Message 8 of 12

Re: Gigabit speeds

Hi... no not connected to port 16 🤔

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Message 9 of 12

Re: Gigabit speeds

Are you sure all 8 wires are firmly terminated. GbE requires all 8 wires but 100M only needs 4.

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Message 10 of 12

Re: Gigabit speeds

I can only think this must be it... although I've continuity tested the cable and that says it's ok.

Perhaps I should try redoing the plugs?

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