[SOLVED] Proxmox 7.1-12 need the PCNET LAN for a Telephone VM

[mx-738]

Hello,

i have a ready to use VM for a PBX Telefon System. For this VM i need a AMD NIC: Am79C970A PCnet-PCI II Single-Chip Full-Duplex Ethernet Controller
In the Post https://forum.proxmox.com/threads/add-custom-virtual-nic-device-in-vm-container.35439/ it's written that i can add

args: -net nic,model=pcnet
balloon: 0

then the VM should work.

I made this, but when i start the VM i got this error:

kvm: -device VGA,id=vga,bus=pci.0,addr=0x2: PCI: slot 2 function 0 not available for VGA, in use by pcnet
TASK ERROR: start failed: QEMU exited with code 1


Is the Version 7.1-12 still support the PCNET ethernet card?
If not, is it possible to add it?
If not, is the Version 6.x support the PCNET ethernet card?

 

[leesteken]

You might need to chose an unused (by Proxmox) address for the virtual device. Try something like: args: -net nic,model=pcnet,addr=0x16

 

[mx-738]

Hi leesteken,

thank you for this information. With the addr=0x16 the VM starts.
How can i map this PCNET NIC to my vmbr0?

 

[leesteken]

How can i map this PCNET NIC to my vmbr0?

I don't know how that works, sorry.
When I use qm showcmd 100 for a VM (with number 100), with a single virtio network device net0, it ouputs something like:
-netdev 'type=tap,id=net0,ifname=tap100i0,script=/var/lib/qemu-server/pve-bridge,downscript=/var/lib/qemu-server/pve-bridgedown,vhost=on' -device 'virtio-net-pci,mac=52:54:56:01:00:00,netdev=net0,bus=pci.0,addr=0x12,id=net0'.
It's not clear to me how that connects to a bridge like vmbr0. Probably the Perl scripts in /var/lib/qemu-server/ read the VM configuration file.
Maybe you can do something like that for your virtual PCNET and write you own scripts to connect to the right bridge?

 

[leesteken]

Alternatively, you might get away with adding a virtio net0 device and then just change net0: virtio=52:54:56:01:00:00,bridge=vmbr0 to net0: pcnet=52:54:56:01:00:00,bridge=vmbr0. This won't be supported by Proxmox or the web GUI, but it appears to just work. Then you won't need the args: ... at all.

 

[mx-738]

net0: pcnet=52:54:56:01:00:00,bridge=vmbr0
That looks great, as i can see the system recieve an IP address, so it sould work.
I have to check it with the phone company, to see if it works right. but everything looks fine for the moment.

Thank you a lot, great support.

 

[ivanromeromendoza]

net0: pcnet=52:54:56:01:00:00,bridge=vmbr0
That looks great, as i can see the system recieve an IP address, so it sould work.
I have to check it with the phone company, to see if it works right. but everything looks fine for the moment.

Thank you a lot, great support.

Hi! Sorry for revive this post, i`ve done that and Interface go UP...ish, but not working, no ping in or out. This is REdHat 3 VM with 2.4 Kernel, so its OLD.
Any ideas? thanks!