[libvirt-users] SR-IOV Pool Availability

[Dax Kelson]

I have an Intel X540 SR-IOV NIC in a box with ACS support running RHEL6.4.

Hi Hongming, I'm hoping you can please help with two issues:

1. The pool works, but I transparent VLAN with the pool does not. I
have to manually run "ip" afterwards to get it to work.

#  virsh net-dumpxml em2net
<network connections='1'>
  <name>em2net</name>
  <uuid>d5dabeb2-fa09-3edf-660a-db42d8cd3f4d</uuid>
  <forward mode='hostdev' managed='yes'>
    <pf dev='em2'/>
      <snip giant list of VFs>
  </forward>
</network>

#  virsh dumpxml guestbox
---
    <interface type='network'>
      <mac address='52:54:00:c0:de:00'/>
      <source network='em2net'/>
      <vlan>
        <tag id='17'/>
      </vlan>
      <alias name='hostdev0'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x07'
function='0x0'/>
    </interface>
---

The networking doesn't work until I run the following command on the host:

ip link set em2 vf 0 vlan 17

Then networking in the guest starts working and the following shows up
in dmesg on the host:

ixgbe 0000:01:00.1: Setting VLAN 17, QOS 0x0 on VF 0

2. I can only do a single SR-IOV NIC per guest. If I try to add
another NIC (or even PCI passthrough), I get "Duplicate ID 'hostdev0'
for device"

Best regards,
Dax Kelson