modified the wrong file


New Member
May 19, 2023
Well, I'm not proud, I played with this file
earlier today and VMs cant reach network now

Instead of using the GUI I used /etc/network/interfaces to make my changes. I removed an old pci card port name manually. I also remove a bridge that was not in service since a couple of weeks then I did this command : systemctl restart networking

When I did that, gui was still reachable, but no VMs was able to access the network, I double checked the file, everything was fine exept the removed lines.

Then I decided to reboot VMs to see whats happen. Then BOOM network back online!

It was the fix, but should I do something else? Is there something wrong if I reboot the proxmox ? Missing file somewhere?

I assume this thread is for Proxmox VE (and not for the Mail Gateway)?
I moved the thread accordingly.

The issue is most likely due to running:
systemctl restart networking

This has never worked in PVE (and in my experience also not in most other situations) - the issue with PVE is that your VM's virtual nics lose the association to the bridge, through which they connect to the outside world

In PVE you can run `ifreload -a` to correctly reload your network config - or ... use the GUI

I hope this explains it!
I used the gui to apply random conf. For exemple adding a dummy bridge, then earase it to allow apply button. So if I understand well, you are saying that running ifreloas -a in shell can help to fix potential issue? Will a reboot do the same?


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