60% packet loss when connected to an unmanaged switch

[Butterwhales]

So new to cachyOS just got it all installed today and ive been experiencing lots of packet loss only when im hooked up to my 2.5gbit dlink 8 port switch.

When i connect directly to my router/switch/access point via ethernet combo no issue
When i connect through wifi to the router no issue

Connected to this unmanaged switch is the only time i get packet loss. Tested by pinging various other computers/devices on my network
Ive swapped cables and reboot everything

Any suggestions?

[CoolDownTimer]

Then it’s probably the NIC/drivers. I have had very bad experience with some Realtek NICs, especially the 2.5G ones on Linux. Get a different NIC, preferably Intel, or if you don’t have the PCIe slot/space inside, get a USB/USB C 2.5G Linux supported NIC

[Butterwhales]

I believe I’ve discovered the solution to this. On install cachyOS loaded the r8169 driver which only sort of worked….

I looked around and discovered i could install a aur package called r8125-dkms
Link: AUR (en) - r8125-dkms
Thanks last commenter

So far after installing it with paru it seems the issue has been resolved and i can go back to using ethernet

Working at the full 2.5 gbps now

[Steeledpick]

@Steeledpick

Realtek based 2.5Gbps NICs (especially the widespread RTL8125B chip) under Linux when paired with some cheap/unmanaged 2.5Gbps switches D-Link DMS-108 is one of the switches that is known to have problems with it on Linux.

You can try to force the connection to 1gig with sudo ethtool -s speed 1000 duplex full autoneg off
for testing. I don’t know what your hardware your using though

If its the r8125 then you can try the following.

sudo pacman -S r8125-dkms linux-headers  # or linux-cachyos-headers if you use cachyos kernel
sudo mkinitcpio -P   # if needed
sudo reboot

Thats all I can think of.

[Steeledpick]

Yes its much more stable.