This topic

Gigabit speeds

gingerangles — Wed, 05 May 2021 07:15:23 GMT

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?

Re: Gigabit speeds

Les-Gibson — Wed, 05 May 2021 08:24:37 GMT

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

Re: Gigabit speeds

gingerangles — Wed, 05 May 2021 08:36:50 GMT

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.

Re: Gigabit speeds

NigelB72 — Wed, 05 May 2021 09:23:56 GMT

Does the laptop have a gigabit network card?

Re: Gigabit speeds

gingerangles — Wed, 05 May 2021 09:24:48 GMT

yup 🙂

Re: Gigabit speeds

NigelB72 — Wed, 05 May 2021 12:28:26 GMT

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

Re: Gigabit speeds

Les-Gibson — Wed, 05 May 2021 20:08:25 GMT

@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

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

Re: Gigabit speeds

gingerangles — Wed, 05 May 2021 20:13:20 GMT

Hi... no not connected to port 16 🤔

Re: Gigabit speeds

licquorice — Wed, 05 May 2021 20:15:36 GMT

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

Re: Gigabit speeds

gingerangles — Wed, 05 May 2021 20:20:53 GMT

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?

Re: Gigabit speeds

Les-Gibson — Wed, 05 May 2021 20:24:39 GMT

Can you not just temporarily disconnect another piece of kit and try the laptop on the end of that cable?

Re: Gigabit speeds

licquorice — Wed, 05 May 2021 20:49:31 GMT

@gingerangles wrote:

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?

Good plan