I have an intel 4 port NIC that only had one port active. I tried added the other ports through the gui and then proxmox froze. I restarted I am able to access the console directly not SSH. I have tried plugging in to each of the internet ports but no lights are on any of the ports. Please see attached picture of my hardware, and etc/network/interfaces. I am sure it is an easy fix but I am not sure how to do it.
https://imgur.com/a/aw9ZF78
https://imgur.com/a/aw9ZF78