Network not usable - drops Interfaces all the time - X540-T2

Hi i am new to this Forum

i came from Networking site and i try to get more knowledge on Virtualization in my Homelab..
first i dont get it why Proxmox has so much issues to get a stable NetworkConfiguration with absolute Standard Network Cards

i mean i have network but i cant Upload an Image or as soon a little load get on it Proxmox will loose its Network Interfaces it is real annoying ....

in this case i use Intel X540-T2

i find so many Reports with Google about that issue but it...

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