I had a problem after upgrading one of my VMs to Debian 11 so I made a rollback followed by a VM restart. Now the VM has lost it's IPv4 address, only IPv6 is available:
My Proxmox version in use is: 6.4-14
Any ideas how this could happen and how I can get back the IPv4 address?
> how does the container get its IP addresses normally?
Via DCHP and I've changed nothing in my router config. The only thing I can remember which maybe could cause the problem is that I create the snapshot while the VM was running. Maybe I had to shutdown the VM to get a "clean" snapshot?
Because I had the same problem with another VM: Maybe the DHCP lease time of my router was too long (3 weeks). After setting it to 30 minutes the VM got the usual IP back.
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