Gigabit speeds

[gingerangles]

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?

[Les-Gibson]

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 

[gingerangles]

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.

[NigelB72]

Does the laptop have a gigabit network card? 

[gingerangles]

yup 🙂

[NigelB72]

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

[Les-Gibson]

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@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.

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

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

[gingerangles]

Hi... no not connected to port 16 🤔

[licquorice]

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

[gingerangles]

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?