Networking works at boot but falls over when pushing image

[Harth]

Hi, Fresh install of the latest version of proxmox, networking works at first and then falls over after attempting to upload ubuntu via the webui, posting a few logs

Tried installing raw debian and the networking broke after installing the proxmox kernel, so reinstalled the proxmox iso.

Any help appreciated

 

[Kingneutron]

Could be bad/overheating NIC, driver issue, bad cable, bad port on switch, etc. Look at your network infrastructure and test point-to-point speed with e.g. iperf3

Post hardware details - lspci of ethernet, speed, switch, router, etc