Just wanna chime in and say that I had the exact same problem. I'm on Unraid 6.2.10 with an Ubuntu 24.04 VM. I sat a static IP on the enp1s0 interface after installation which worked just fine, but after adding an Unraid share in the VM settings, it had changed to enp3s0. All I needed to do was to change from enp1s0 to enp3s0 in the netplan config file, if anyones interested `/etc/netplan/01-netcfg.yaml`:
 

network:
  version: 2
  ethernets:
    enp3s0:
      dhcp4: no
      addresses:
        - 192.168.1.158/24
      routes:
        - to: default
          via: 192.168.1.1
      nameservers:
          addresses:
            - 192.168.1.1
            - 1.1.1.1

 

 

I'm still getting this issue on 7.0.1.

I have a successfully running Ubuntu 24.04.02 server with 1 9p manual share running.  As soon as I try to add a second 9p share, either manual or unraid share, I can not get an IP address.

Still an issue in 7.1.4. The bug is that adding a share robs the pci address of the network card in the vm definition. The interface does get a new pci address, but that changes the network interface names inside the vm. So, you either have to restore the pci address in the vm definition, or adjust network settings inside the vm.

I myself used the fix in this comment . In a nutshell, restore back the old pci address of the network interface. The bus attribute in "<address ... >" got changed. When restoring, move the new bus value from the interface into the new share's bus value. Otherwise there are two devices with same pci address.

Edited July 14, 2025Jul 14 by Helediron

still issue in 7.2.2

I still have the same issue in 7.2.3.

Need to swap the pci to make network working.