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Description of problem:

Refer to Bug 998865 Comment #3.

> Hi, qiguo
> 
> Does rhel6 support vlan parameter in RHEL6? I remember we use it for RHEL5.
> Anyway, the assertion is not good.

Hi, xhan and qzhang

Only RHEL5 host uses the vlan para, so we do not support it in rhel6 and rhel7, you can file a bug that remove the options in rhel6.

Thanks !
Qian Guo.

Need remove vlan option for all virtual nics in 
        1) the command line help 
        2) and man help.

qemu-kvm -device e1000,?
e1000.mac=macaddr
e1000.vlan=vlan                   <------
e1000.netdev=netdev

qemu-kvm -device virtio-net-pci,?
.....
virtio-net-pci.mac=macaddr
virtio-net-pci.vlan=vlan          <------
virtio-net-pci.netdev=netdev

qemu-kvm -device rtl8139,?
rtl8139.mac=macaddr
rtl8139.vlan=vlan                 <------

Version:
qemu-kvm-rhev-0.12.1.2-2.394.el6.x86_64

vlan option should continue to remain a valid option and should not be removed.
Upstream already correctly handles the coexistence of vlan and netdev options,
which was the root cause of the original problem (BZ 998865).  We will add
proper error handling in RHEL6 to prevent the invalid configuration.