Ubuntu Server VM Lost Internet Access After Restart

[allie83go]

Hello,

I have a very similar problem as mentioned in this thread here: https://forum.proxmox.com/threads/u...ernet-access-while-other-vms-are-fine.102049/, however the solution mentioned does not work for me.

I have a Ubuntu Server (22.04.1 LTS) VM that has been working perfectly for ~2 months with multiple reboots, however when I rebooted it last night, it now longer has internet access and cannot connect to the gateway. Nothing has been modified within PVE itself, or the VM's config, but I did try to restore the VM from a backup and had the same results.

It's also worth the mention, I have other VMs that I have installed that still work as expected.

ip a:



The ens18 interface is "DOWN" and that's what it should be using for internet access.

route:



The default route seems to be missing?

I don't have a /etc/network/interfaces file as I believe this version of Ubuntu no longer uses it and the only file I have within /etc/netplan is 00-installer-config.yaml with the following contents:



I also cannot modify the above file because it seems like netplan is not installed by default? And since I don't have internet access with this VM, I cannot install it.

Any help would be appreciated!

 

[cheiss]

Hi,

could you please provide the output of qm config <vmid> and pveversion -v?
Also, are there any messages which might be relevant to this in the syslog (host and/or VM)?

I'm not really familiar, but can you also try running ip link set ens18 up in the VM and see what it does? This should force the interface up.