Problem
After some forum and internet search it seems the primary reason for the Realtek RTL8125B 2.5GB network card not working if for a lack of the right driver in the Truenas Scale. I’m currently on version 25.04 so it still seems a problem. I found the existing ticket NAS-124224 was created suggesting to create a feature request so that it can get voted on.
Impact
I found this topic has been brought up multiple times even with Truenas Core. Common statement is built-in driver packages in Truenas modifications should be avoided. As it would break with every new release of Truenas.
User Story
As mentioned in ticket NAS-124224 maybe offer a GUI option to select varies drivers to different peripherals. 2.5GB network cards are really cheap.
2 Likes
This would be nice. Just bought this nic to replace a dead intel to find out truenas doesn’t support it (even tho linux does).
Um, I am using RTL8125B without any issues on multiple TrueNAS boxes. I have no idea what people are talking about when they’re claiming it’s not supported, since I didn’t have to do anything other than pop the card in.
I read that on the forums for some people it just works. In my case the nic is able to link up while the system is still booting through BIOS. Once it gets into Truenas link turns off and does not show up in the GUI. Running some linux commands i’m able to see the hardware but I believe it has a incorrect realtek driver stack attached to it. I’ve read you can manual replace the included driver however it is typically not recommended. This is my personal backup so I’m not willing to risk it messing with system level files.
Nics are so cheap and plentiful these days a 2.5gb Intel card is 25 bucks and an Amazon box away. Especially since Realtek cards are known bad entities for truenas and that’s a short list.
