Proxmox VE 8.0 + UDM Pro clients disconnected alerts

daniele.ci

New Member
Jul 31, 2023
1
0
1
Hi, I'm having this annoying problem. I installed Proxmox 8.0 on a PowerEdge R250 Server with two NICs. Currently Proxmox is installed using only one of the two cards in bridge with ip 192.168.20.10/24.

auto lo
iface lo inet loopback

iface eno8303 inet manual

iface eno8403 inet manual

auto vmbr0
iface vmbr0 inet static
address 192.168.20.10/24
gateway 192.168.20.1
bridge-ports eno8303
bridge-stp off
bridge-fd 0

iface idrac inet manual

I have installed some Windows Server 2022 virtual machines (192.168.20.11, 192.168.20.12, etc.) and two Linux machines (Debian 12 and Fedora Server) using VirtIO para-virtualized as network model.

The QEMU agent is installed in every machines.

My infrastructure is: UDM Pro as gateway + 48 ports Pro switch and 24 ports POE Pro switch connected in fiber optics.

My problem is: Dell server with Proxmox and virtual machines are configured to use VLAN 20 called "Servers".

I have not enabled VLAN support on Proxmox's network. I tagged the port with VLAN 20 into the 48 port switch.

The problem is that I get a lot of alerts like the following:
Machine X has disconnected from VLAN Servers. If this is unexpected, please ensure the device's connections are secure and undamaged.
Machine Y has disconnected from VLAN Servers. If this is unexpected, please ensure the device's connections are secure and undamaged.
etc. etc. 1000 times a day.

If I ping from Proxmox to UDM Pro there is no packet loss, same from Promox to UDM pro. If I connect with RDP to a machine I don't loose the connection, but If I log out the machines I get the alert the the system was disconnected from the VLAN.

If I connect to the machines with remote desktop I don't riceve the alert (I left the session active for 10 hours), but when I exit the remote desktop I get this disconnected client alert.

With the Fedora Server I haven't problem, with Windows, Debian and Ubuntu yes.

Can you help me? I'm going crazy.. I don't know if the problem is Ubiquiti or some misconfigued Proxmox.

Proxmox is updated with the last packages and kernel.

Thank you,

Daniele
 

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