What's the make and model of the switch? Is it a managed switch? Does it support EEE?

If the cable is labelled with a fantasy spec / bandwidth then I would be tempted to blame the cable.

It is otherwise very strange for a host not to come back at the rated speed of the NIC following a cold reboot if the cable is really ok.

The devices on both ends make an assessment of whether a cable can sustain 2.5G, 1G, 100M and so there is really no point in trying to set manual speed/duplex for 1G or faster because instead of negotiating a usable rate you just get link dropouts and/or retries instead.

(yes I realise there are known corner cases for things like how BT historically configure ADVAs without auto negotiation and you end up with a fallback to 10M/half. and this is not that)

Edited by prlzx (Mon 05-Aug-24 11:05:20)

Have you checked that Energy Effiecient ethernet on the pc is not enabled ? My intel 1gbit nic is enabled but my realtek 2.5 isn't. The realtek has also an EEE speed setting too which the intel one hasn't

My memory serves me wrong...

This is not the cable that listed its self at cat 6e. I found the order on Amazon. Had this since 2019.

https://www.amazon.co.uk/dp/B00YSFSLKO/ref=pe_318791...

The switch is this:
https://www.amazon.co.uk/dp/B09M2WFBP1?psc=1&ref=ppx...

I am using this router as my WiFi AP but its also on standby as a backup for my PFSENSE/Proxmox box if that goes tits up.

https://www.amazon.co.uk/dp/B0CP7S3117?psc=1&ref=ppx...

This has 2x 2.5gbps ports and one is spare at the moment. I might try connecting to that vs the switch and see if the problem follows. If it does then it's either the cable or the PC.

In reply to a post by Seansmit17:

This has 2x 2.5gbps ports and one is spare at the moment. I might try connecting to that vs the switch and see if the problem follows. If it does then it's either the cable or the PC.

Do this now, as that will sort out if its the pc settings or the cable...... You may find that its fine with that combination but I'd then try another shorter cable with the switch, as it maybe the cable being sensitive to the switch compared to the GL-MT6000. Personally i'd double check the nic settings in device manager as a matter of procedure to rule out that and it only takes a minute

In reply to a post by Seansmit17:

My memory serves me wrong...

This is not the cable that listed its self at cat 6e. I found the order on Amazon. Had this since 2019.

https://www.amazon.co.uk/dp/B00YSFSLKO/ref=pe_318791...

on a side note the comments for that cable is hilarious

Edited by Taras (Tue 06-Aug-24 07:32:59)

In reply to a post by Taras:

on a side note the comments for that cable is hilarious

As is the current price, £0.10p BUT postage is £3.98p...

Cheers!

I think there is high chance the problem is the quality of the cable, I've experienced the same in the past.
I've had good results with "Cable Matters" cables from Amazon running at 2.5G and 10G

Equivalent to your linked one is probably https://amzn.eu/d/eYtE20N but shorter the better.

I paid £2.49 and free shipping as I had prime

The issue seems to have gone now I’m connected to the router vs the switch.

I will confirm tonight when I get home from work.

This switch and pc and cable never had this issue for the first month of using it.

But I’ll grab the suggested cable and see how that goes

Just noticed that this is the same cable I bought to go from the switch to my other devices. Router pfsense etc I got a 5 pack of .9m cables 😁 and those have been working flawlessly

Is your BIOS on the PC up to date?