KVM Guest does not inherit VLAN Tag from host interface with ixgbe and ixgbevf drivers in RHEL 6.4

Issue

• KVM Guest does not inherit VLAN Tag from host interface with ixgbe and ixgbevf drivers in RHEL 6.4.
• VLAN tagging fails with SR-IOV to KVM Guest.
• Modprobe option ixgbe max_vfs=63,63 fails to create SR-IOV VF virtual function devices with VLAN tagging enabled on the guest network devices.
• VF virtual function devices are not created with SR-IOV and ixgbevf driver in RHEL 6.4

KVM guest configuration showing VLAN TAG ID 42

virsh dumpxml RHEL64

<interface type='hostdev' managed='yes'>
      <mac address='d2:0f:cf:32:00:c4'/>
      <source>
        <address type='pci' domain='0x0000' bus='0x15' slot='0x10' function='0x0'/>
      </source>
      <vlan>
        <tag id='42'/>                      <--------------- VLAN tag defined
      </vlan>
      <model type='virtio'/>
      <alias name='hostdev0'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x1a' function='0x0'/>
    </interface>

Expected results:

[root@lab053-host06 vm]# ip link show eth0 | head
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1508 qdisc mq state UP qlen 10000
    link/ether e4:11:5b:95:03:18 brd ff:ff:ff:ff:ff:ff
    vf 0 MAC d2:0f:cf:32:00:c4, vlan 42     <--------------- SUCCESS VLAN tag

Actual results:

[root@lab053-host06 vm]# ip link show eth0 | head
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1508 qdisc mq state UP qlen 10000
    link/ether e4:11:5b:95:03:18 brd ff:ff:ff:ff:ff:ff
    vf 0 MAC d2:0f:cf:32:00:c4              <--------------- FAIL VLAN tag