Network slowdown

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I have three pc on my LAN, A, B, & C. Up till a week ago A, B and C were each getting – per ookla – 50 Mbps Internet down load over wifi and  A would get 100 Mbps down 15 Mbps up over wired ethernet. B and C are still getting 50 Mbps, but A has dropped to a very consistent 10 Mbps up or down whether wired or wifi. A has run W10 1909 for about six weeks. No other slow down has been noticed. Nothing was installed coincident with the slowdown. Typical memory usage is 25% of 28 GB, C drive is not showing any sign of problem, processor (4G i7) runs very light. Both A and the router have been reset multiple times.

Obviously solutions regenerating the original speed are the pot of gold for me, but in the mean time does anyone have recommendations for an app that will check my LAN speed so I can see if the problem is LAN,  or if this one pc has a throttled WAN speed?

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I use Robocopy (built in to Windows) with a large file or 2 as it works by naming the network path directly and has a nice summary with throughput. You must turn off the progress indicator (/NP) as this slows the process down with screen updates.

GUI for Robocopy

cheers, Paul

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petermat

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petermat wrote:

but in the mean time does anyone have recommendations for an app that will check my LAN speed so I can see if the problem is LAN,  or if this one pc has a throttled WAN speed?

You can test these Network diagnostic apps :

Try All My LAN.

https://www.networkworld.com/article/3325736/10-useful-and-free-networking-tools-that-are-windows-10-apps.html

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Artur Z, petermat

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OK I now have enough data to be confused as well as upset – as follows:

With ethernet disabled and wifi enabled in network connections

All My Lan reports Up speed as 144 Mps, Down Speed as 300 Mbps

Robocopying 2 of 1.1 GB files reports Speed as 1.2 Mbps

OOpsla browser and native internet speed tests offered Download of 30 Mbps and Upload of 16 Mbps

With ethernet enabled and wifi disabled in network connections

All My Lan reports Up speed as 10 Mps, Down Speed as 10 Mbps

Robocopying 2 of 1.1 GB files stalled after copying the first file – tried three times.

OOpsla browser and native speed tests offered Download of 9.5 Mbps and Upload of 9.5 Mbps

Note that with the same hardware I have, in the past, measured over 200 Mbps  over  wired ethernet. And yes I have tried unplugging and replugging.

I believe ethernet adaptors report their speed capability. How is this done? Could the setting on the ethernet be corrupt? This port is direct off the motherboard

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So, Wi-Fi is faster than ethernet? The first thing I would check is the ethernet cable from PC to router, i.e. seated firmly at both ends, no damage to the cable itself caused by moving furniture, etc. If possible, do a substitution test with another ethernet cable.

If, after this, the results are the same (i.e. ethernet much slower than Wi-Fi) then the next step is to look at harware and drivers (and any Windows updates).

Hope this helps…

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petermat

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petermat wrote:

Robocopying 2 of 1.1 GB files reports Speed as 1.2 Mbps

Robocopy reports in mega Bytes per second, internet speed is usually measured in mega bits per second – around 10 bits to one Bytes in speed measurement.

cheers, Paul

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petermat

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Paul,

True, and I knew that but misreported – my apologies, and thanks to pointing it out.

Rick,

First thing I checked – always on ethernet – was the ends, without any effect. I had hesitated over substituting the cable because it was difficult but you pushed me over the edge on that, and it did fix the problem. Not furniture – the cable goes up the wall through the loft and down the wall – maybe a rat!! So I just have to climb up there with another long cat 5 cable  – rats!

Thanks to all.

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@petermat – I know your pain.

Many years ago I did onsite support and cable integrity-testing was a nightmare. One of my local technical stores closed down and during their fire sale I bought a ‘Fluke’ network tester for a pittance. This meant I could test cable integrity in a matter of minutes rather than using the ‘cable substitute’ method. It worked perfectly for 12 years then just failed… and I couldn’t justify the cost of replacing it. So… back to the old ‘cable substitute’ method.

Anyway, good to hear that it’s fixed. Thanks for letting us know.

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[EP]

@petermat

you should be using either a CAT 5E or CAT 6 cable (NOT CAT 5) if you want much faster internet speeds thru a wired/ethernet connection

• This reply was modified 2 years, 11 months ago by EP.

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Artur Z

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EP – my memory error – it’s a while since I bought cables. They are in fact 5e and I am getting over 300 Mbps

Thanks again.

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