please delete this post

[kemil]

I installed ifupdown2 with apt install ifupdown2 and it installed from debian repos instead of proxmox.

now, network connectivity is lost, and my server cannot boot from HD. I just have access to rescue mode.

I tried
Code:
apt update && apt dist-upgrade
, but still server could not restart from HD mode.

in the rescue mode, when I check my network interfaces, it is different than when it was working fine. I will put some output below, Please take a look and suggest some solution.

 

[oah433]

I am not 100% sure, but proxmox doesn't just use the normal config, it defines using "tap" interfaces firewall-bridge as we all as the vmbr0 bridge which I am not seeing in ur config above. Have you tried to copy the default config from a working proxmox setup?

 

[kemil]

I am not 100% sure, but proxmox doesn't just use the normal config, it defines using "tap" interfaces firewall-bridge as we all as the vmbr0 bridge which I am not seeing in ur config above. Have you tried to copy the default config from a working proxmox setup?

Yes. I tried the default config copied from a working server. But server is not booting up from HD. I have to again put it into rescue mode and then network is reset.

 

[Neobin]

You already have a long thread: [1] going on, that lead to nowhere, because it seems that you have absolutely no clue what your own network setup looks like.
How should others know, how it looks like, if even you do not know it?!

Maybe consider getting paid help/support...

[1] https://forum.proxmox.com/threads/r...etwork-configuration-cannot-access-gui.120624