problem hotplug NIC "400 Parameter verification failed"

[AlexKir]

Hello!

I can not hotplug add NIC to vm

400 Parameter verification failed
VM 227 qmp command failed - VM 227 qmp command 'netdev_add' failed - Device 'tap' could not be initialized

After I turn off vm nic added without problem.

# qm config 227

qm config 227
bootdisk: virtio0
cores: 2
ide2: none,media=cdrom
memory: 4096
name: pg-test
net0: e1000=AE:40:EE:B3:AD:53,bridge=vmbr300
numa: 0
ostype: l26
smbios1: uuid=df231fb6-060c-4ffb-a8eb-6b734ffb1466
sockets: 1
virtio0: vm_shared2-1:vm-227-disk-1,cache=writethrough,size=32G
virtio1: vm_shared2-1:vm-227-disk-2,cache=writethrough,size=32G

# brctl show

bridge name     bridge id               STP enabled     interfaces
vmbr3           8000.a0d3c1f7fd79       no              eth1.3
                                                        tap144i1
vmbr300         8000.a0d3c1f7fd79       no              eth1.300
                                                        tap122i0
                                                        tap127i0
                                                        tap128i0
                                                        tap131i0
                                                        tap200i0
                                                        tap201i0
                                                        tap212i0
                                                        tap214i0
                                                        tap227i0
vmbr301         8000.a0d3c1f7fd79       no              eth1.301
                                                        tap133i0
vmbr312         8000.a0d3c1f7fd79       no              eth1.312
                                                        tap219i0

#qm set 227 -net1 e1000,bridge=vmbr3

update VM 227: -net1 e1000,bridge=vmbr3
400 Parameter verification failed.
net1: hotplug problem - VM 227 qmp command 'netdev_add' failed - Device 'tap' could not be initialized

# pveversion -v

proxmox-ve-2.6.32: 3.4-156 (running kernel: 2.6.32-39-pve)
pve-manager: 3.4-6 (running version: 3.4-6/102d4547)
pve-kernel-2.6.32-39-pve: 2.6.32-156
pve-kernel-2.6.32-37-pve: 2.6.32-150
pve-kernel-2.6.32-26-pve: 2.6.32-114
lvm2: 2.02.98-pve4
clvm: 2.02.98-pve4
corosync-pve: 1.4.7-1
openais-pve: 1.1.4-3
libqb0: 0.11.1-2
redhat-cluster-pve: 3.2.0-2
resource-agents-pve: 3.9.2-4
fence-agents-pve: 4.0.10-2
pve-cluster: 3.0-17
qemu-server: 3.4-6
pve-firmware: 1.1-4
libpve-common-perl: 3.0-24
libpve-access-control: 3.0-16
libpve-storage-perl: 3.0-33
pve-libspice-server1: 0.12.4-3
vncterm: 1.1-8
vzctl: 4.0-1pve6
vzprocps: 2.0.11-2
vzquota: 3.1-2
pve-qemu-kvm: 2.2-10
ksm-control-daemon: 1.1-1
glusterfs-client: 3.5.2-1

 

[tom]

Hello!

I can not hotplug add NIC to vm

400 Parameter verification failed
VM 227 qmp command failed - VM 227 qmp command 'netdev_add' failed - Device 'tap' could not be initialized

...

Looks like the VM has no NIC, therefore no additional NIC can be hot-plugged.

Try hot-plugging a second NIC.

 

[AlexKir]

Looks like the VM has no NIC, therefore no additional NIC can be hot-plugged.
Try hot-plugging a second NIC.

No. This is second nic (see vm config)

Earlier, hotplug worked.
It stops working after the upgrade, but I can not say exactly when

 

[AlexKir]

Strange.
I turn off vm and turn on again and I hotplug added nic without error.
But now I can not hotplug remove NIC, I receive error "400 Parameter verification failed"

 

[spirit]

does it work with virtio nic ?

 

[AlexKir]

does it work with virtio nic ?

No.
After turn off/on VM I can add hotplug nic but can not remove it.

 

[spirit]

what is your guest os ?
do you have loaded modules

#modprobe acpiphp
#modprobe pci_hotplug

?

unplug failed could be the guest no releasing the device

 

[AlexKir]

SLES 11 SP3 & Windows 2008 R2

I am performing tests with SLES I load module and NIC plug & unplug without error

Thanks

I check with Windows and it`s work.

Early I could not plug nic to my windows vm and I had turn off/on vm for add nic
And I begin test with SLES vm

 

[Antan]

I am also having the same problem. It only happens in Win 7.

 

[abarakat]

You need to add the MAC address and it will update the existing network card vs adding a new one with new mac.

 

[Glob]

Hello!

I can not hotplug add NIC to vm

400 Parameter verification failed
VM 227 qmp command failed - VM 227 qmp command 'netdev_add' failed - Device 'tap' could not be initialized

After I turn off vm nic added without problem.

I had this problem when I used an inactive bridge for the new nic. You can add such nic when the VM is off, but it probably won't boot