VM kills physical NIC on hypervisior

[helldunkel]

Hi,

I installed the service bunkerweb on a plain Debian12 VM.
After some time the physical NIC which the VM is comunicating make some strange things -> is not usable.

Proxmox 8.4.1
physical NIC -> bridge -> VMs

On same bridge runs 14 more server, no problems the last 10 years.

Bunkerweb is nginx with some modifications and an UI.

Only restart the physical NIC helps.

Where I can start debug? Itś strange. Never had before.

 

[hd--]

Can you please be a bit more specific about the issue:

After some time the physical NIC which the VM is comunicating make some strange things -> is not usable.

Normally the VM has a virtual NIC, are you talking about the Virtual NIC of the VM or the physical NIC of the host.
If it is the physical NIC of the host, is the Link up for the NIC?
ip a | grep <iface>
If it is the virtual NIC of the VM, do you receive errors in the VM or can you see messages in the journal?

Can you please check the journal of the host as well for connection issue?

 

[helldunkel]

It is the physical NIC of the host that makes trouble.
The phyiscal NIC is up.

root@pve:~# ip a | grep enp0s25
2: enp0s25: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master vmbr200 state UP group default qlen 1000
23: enp0s25.60@enp0s25: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue master vmbr200v60 state UP group default qlen 1000
32: enp0s25.250@enp0s25: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue master vmbr200v250 state UP group default qlen 1000

After the VM is up and runs some time vlan60 is not working on interface (line "23:").

The problem VM runs without VLAN.

 

[hd--]

Can you please post you full network configuration?
cat /etc/network/interfaces
Feel free to anonymize the output.