Why does the Ubuntu network periodically disappear and the data transfer speed is 100Mbps, although the network card has a declared 1000?

Question

linux

Why does the Ubuntu network periodically disappear and the data transfer speed is 100Mbps, although the network card has a declared 1000?



I connect via wi fi to the network everything works without interruption, why is that?

Answer 1

Network card or cable

Answer 2

Questions about your network card, the cable plugged into it, or the port on the ISP switch if the cable goes directly to the computer.

Answer 3

I would venture to suggest that the firewood on the adapter is not quite gut arbiten.
Waffle and Isernet are usually different adapters.
In the case of Waffle, everything works fine, but the Izernet adapter does not want, which is very often the case in Ubuntu, especially with new chips.
Dig a decent driver or a fix from the guys in the open.
I think you are not alone with this trouble with your adapter.
Manual configuration of the netplan config often helps.
Those. Completely manually prescribe all the parameters.
By default, this file (it can be of 2 types: 01-netcfg.yaml and 01-network-manager-all.yaml. The first one is controlled by Networkd, and the second by NetworkManager) is very poor in terms of parameters, but it can be modified and any adapter cine can be written from and to!