Proxmox server not connecting after reboot or reboot of the router

[DanXIV]

Hi guys.
I'm facing this issue where my server won't connect to my LAN after the connection is lost for any reason.
If my server or router reboots my proxmox server won't connect.
It connects randomly after few or many forced reboots, and if I'm lucky it connects.
Since I'm new to proxmox and not an expert on linux I'm clueless where to start to investigate.

I searched in many other threads and forums but with no success.

Thank you for any help you can provide.

 

[DanXIV]

I ran a couple of commands that i saw from a similar post in case someone asks me theese outputs.

 

[sw-omit]

Were these commands ran on one of the times when the server was connecting to the network?
If so, it's good to have, but we'll probably need it from a moment where it is not working as well (a photo of the monitor works too)
As well as the above, also try these commands:

ping 192.168.1.1
ping 1.1.1.1
ip r
ethtool enp2s0
/sbin/ifup enp2s0
ping 192.168.1.1
(yes that last one is a repeat, it's for after we've run the /sbin/ifup command to see if something changed)

 

[DanXIV]

I'll Leave this in case someone lands on this thread for a similar problem. In this case the problem wasn't software, it was hardware, after months of troubleshooting I happend to change a component and everything started working. In my case it was a faulty USB-C hub. I don't really wanna know why and I shouldn't wonder, but this hub was causing electrical problems and the system was actually turning on, I suppose it wasn't posting some times or it was causing problems only on the Ethernet chip, since i could see a display output and ran commands. Also my server is a zimablade that doesen't have status LEDs for diagnostics, sooo good luck finding out. Unfortunately it was totally random so good luck finding out X2. I changed the Hub wuth another one and now everything works as intended.
In summary, look out for what you attach to your server.