New network port created and old one hidden after server sudden shutdwon

W

Wodel

New Member
Jul 31, 2022
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Hi,

We have a 3 nodes HCI cluster.
One of our nodes was accidently shutdown (hard shutdown).
After reboot, all Windows VMs had booted with a new network port (same mac address) but as dhcp port, and the old one was hidden by the OS.

Could you help us understand this?

Regards.
 
Hi,

Could you explain more?
Do you mean : "I had updates applied but without reboot" ? No, I have not.


Regards.
 
Proxmox did not create a new interface on the VMs (at least this is what is shown in the WebUI), there was only one NIC per VM and it stayed that way, the problem happened inside Windows VMs.
After the VMs came back, we found that VMs were not reachable, after verification, we found that their NICs has become dhcp configured, and when we tried to configure them back by fixing their IP addresses, Windows displayed a warning saying that a hidden interface has the same IP.

We are worried about this behavior, because it can cause us real troubles.
 
Wodel said:
We are worried about this behavior, because it can cause us real troubles.
Click to expand...
Maybe it's something specific to Windows VMs being unexpectedly shutdown hard because i have never seen this with Linux, but maybe other people here know better.
I think the best prevention is to not shutdown Proxmox hard and to prevent unexpected power loss with something like a UPS and proper shutdown (and regular backups via PBS).
 
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